JP5992568B1 - Pants-type disposable diaper - Google Patents

Abstract

The present invention provides a pants-type disposable diaper having an exterior body division structure in which the display on the display sheet is clearly visible and prevents the opening of the crotch end in the exterior body. A non-stretchable region A1 includes an inner sheet layer 12H and an outer sheet layer 12S continuous from the stretchable region A2, and an unnecessary elastic stretchable member 18 left between the inner sheet layer 12H and the outer sheet layer 12S. The display sheet 25 that is visible from the outer surface is provided adjacent to the inner side of the outer sheet layer 12S in the non-stretchable region A1, and the unnecessary elastic elastic member 18 is not attached to the inner surface of the display sheet 25 and the outer surface of the inner sheet layer 12H. The front side exterior body 12F and the rear side exterior body 12B are fixed, and the sheet material forming the outer sheet layer 12S is folded back and fixed inside the inner sheet layer 12H at the end of the crotch side. This is solved by having the folded portion 20. [Selection] Figure 5

Description

  The present invention relates to a pants-type disposable diaper including a display sheet on which a design or the like is printed.

  The pants-type disposable diaper includes an exterior body that individually or integrally forms a front body and a back body, and an interior body that includes an absorbent body that is attached to the inner surface of the exterior body so as to extend from the front body to the back body. A waist opening and a pair of left and right leg openings are formed by joining the side edge portions of the outer body of the front body and the side edges of the outer body of the rear body to form a side seal portion. Is common.

  In such a pants-type disposable diaper, in order to improve fit to the body, the exterior body has a laminated structure having a plurality of sheet layers, and various elastic elastic members are attached in an expanded state between the sheet layers. In particular, elongated elastic expansion / contraction members along the width direction are arranged in the front / rear direction in the waist area corresponding to the side seal portion and the middle area located between the front and rear waist areas. What is attached in a state of being extended in the width direction at intervals in the direction has a relatively high fit to the body (for example, see Patent Document 1).

  The waistline region and the intermediate region overlap with the front-rear direction range having the absorber, and there are inner and outer fixing portions for fixing the interior body to the exterior body in the range. Therefore, even if an elastic elastic member is provided so as to cross the range in the front-rear direction having the absorber, its expansion / contraction function is limited by the rigidity of the absorber. In addition, the absorbent body may contract in the width direction, thereby deteriorating the wearing feeling and appearance, and the absorbent body may be twisted or cracked, resulting in a decrease in absorption performance.

  For this reason, conventionally, the elastic elastic member is continuously attached along the width direction, and almost the entire portion overlapping the absorber is finely cut, or the elastic elastic member is attached to the exterior body at the portion overlapping the absorber. It is generally employed to form a non-stretchable region where a contraction force in the width direction does not act on the absorbent body by making it non-fixed and cutting at one place in the middle in the width direction.

  On the other hand, the exterior body in the non-stretchable region is superior in light transmittance as compared with the portion where the shrinkage wrinkle is formed because the contraction force of the elastic stretchable member hardly acts and the shrinkage wrinkle is hardly formed. Therefore, the display sheet which attached the pattern etc. was interposed between the exterior body and interior body in this part (refer patent document 1) and the sheet | seat layer (refer patent document 2) of an exterior body.

  Since the display sheet is visually recognized through the constituent material of the exterior body, the display sheet is provided with the elastic elastic member of the exterior body and the outside thereof, as described in Patent Document 2 in that the display can be visually recognized more clearly. It is desirable to interpose between the sheet layers. In this case, since the display sheet and the elastic expansion / contraction member are adjacent to each other, in order to completely eliminate the influence of the contraction force of the elastic expansion / contraction member, the display sheet and the inner sheet layer are elastic. It is desirable to have a display sheet back non-fixed structure in which the elastic member is not fixed.

  However, such a display sheet back non-fixed structure is not an exterior body continuous structure in which the exterior body is continuous from the front body to the back body as in Patent Documents 1 and 2, and the front exterior body that is separated in the front-rear direction and When applied to an exterior body dividing structure having a rear exterior body, when the display sheet is extended to the crotch side end of the exterior body in order to enlarge the display, the sheet layer inside the display sheet and the elastic elastic member And the crotch side opens, and not only the appearance deteriorates, but also the sheet layer of the exterior body may be peeled off. Further, when such an opening is formed, there is a possibility that the elastic elastic member cut in order to kill the elasticity as described above may protrude from the opening, or fragments of the elastic elastic member may come out of the opening. There is also.

JP 2012-1000069 A Japanese Patent Laid-Open No. 2004-254861 JP 2010-158590 A

  Therefore, a main object of the present invention is to provide a pants-type disposable diaper having an exterior body division structure in which the display of the display sheet is clearly visible and the opening of the crotch side end portion of the exterior body is prevented.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
A front exterior body that constitutes the front body and a rear exterior body that constitutes the rear body, and an interior body including an absorbent body provided at the center in the width direction from the inner surface of the front exterior body to the inner surface of the rear exterior body. Prepared,
An inner / outer fixing portion that fixes the front exterior body and the rear exterior body to the interior body, a side seal portion in which both side portions of the front exterior body and both side portions of the rear exterior body are joined, and a waist opening and a parts and pair of leg openings,
The front exterior body and the rear exterior body are spaced apart in the front-rear direction,
At least one of the front exterior body and the rear exterior body includes a non-stretchable region provided in the middle in the width direction in the front-rear direction range having the absorber, and a stretchable region provided on both sides in the width direction of the non-stretchable region. And
The elastic region includes an inner sheet layer, an outer sheet layer, and a plurality of elongated elastic elastic members attached along the width direction with a space in the front-rear direction between the inner sheet layer and the outer sheet layer. And an area having
The non-stretchable region includes an inner sheet layer and an outer sheet layer that are continuous from the stretchable region, a remaining cutting portion that is left between the inner sheet layer and the outer sheet layer, and that is continuous from the elastic stretchable member of the stretchable region, and both. An elastic elastic member in the elastic region and an unnecessary elastic elastic member made of at least one of the cut pieces of the elastic elastic member which is not continuous.
The non-stretchable region is provided with a display sheet visible from the outer surface,
In pants-type disposable diapers;
The display sheet is provided adjacent to the inside of the outer sheet layer in the non-stretchable region,
The unnecessary elastic elastic member is non-fixed to the inner surface of the display sheet and the outer surface of the inner sheet layer,
The exterior body having the display sheet of the front exterior body and the rear exterior body has a crotch side folded portion where a sheet material forming the outer sheet layer is folded back inside the inner sheet layer at an end portion on the crotch side. has,
The width direction range of the non-stretchable region includes the width direction range of the inner and outer fixed portions,
The crotch side folded portion has a portion located in the side seal portion, a portion located in the inner / outer fixing portion, and an intermediate portion therebetween.
The portion located in the side seal portion is sandwiched and fixed between the front exterior body and the rear exterior body, and the portion located in the inner / outer fixing portion has an inner surface that is not fixed to the opposing surface and the inner surface is the inner body. Fixed to the intermediate portion, the outer surface is not fixed to the opposite surface,
A pants-type disposable diaper characterized by that.

(Function and effect)
In the present invention, since the display sheet is provided adjacent to the inside of the outer sheet layer in the non-stretchable region, the display on the display sheet can be clearly seen. In addition, since the unnecessary elastic elastic member has a display sheet back non-fixed structure in which the unnecessary elastic elastic member is not fixed to the inner surface of the display sheet and the outer surface of the inner sheet layer, the influence of the shrinkage force of the unnecessary elastic elastic member on the display sheet is affected. It can be completely eliminated. In particular, in the present invention, the exterior body having the display sheet has a crotch portion in which the sheet material forming one of the inner sheet layer and the outer sheet layer is folded and fixed behind the other at the crotch side edge. It has a side turn part. Therefore, in the exterior body having the display sheet, the gap between the display sheet and the inner sheet layer is closed by the sheet material at the end of the crotch type, so that the gap is surely prevented from opening to the crotch side. As a result, the gap between the display sheet and the inner sheet layer opens to the crotch side, the appearance is deteriorated, the sheet layer of the exterior body is peeled off, or the elastic elastic member cut to kill the elasticity is opened from the opening. It is also possible to reliably prevent the protrusion or the elastic elastic member fragments from coming out of the opening.

<Invention of Claim 2>
The pants-type disposable diaper according to claim 1, wherein the exterior body having the display sheet individually includes a sheet material forming the inner sheet layer and a sheet material forming the outer sheet layer.

(Function and effect)
Thus, in the form which has individually the sheet material which forms an inner sheet layer, and the sheet material which forms the said outer sheet layer, since there are few folding processes of a sheet material, an inner sheet layer and an outer sheet layer are bonded together. There is an advantage that it is difficult to shift. Further, by folding the outer sheet layer inside the inner sheet layer, the folded portion of the outer sheet layer is not exposed on the outer surface of the diaper, so that deterioration of appearance due to folding can be prevented.

<Invention of Claim 3 >
A front exterior body that constitutes the front body and a rear exterior body that constitutes the rear body, and an interior body including an absorbent body provided at the center in the width direction from the inner surface of the front exterior body to the inner surface of the rear exterior body. Prepared,
An inner / outer fixing portion that fixes the front exterior body and the rear exterior body to the interior body, a side seal portion in which both side portions of the front exterior body and both side portions of the rear exterior body are joined, and a waist opening and a parts and pair of leg openings,
The front exterior body and the rear exterior body are spaced apart in the front-rear direction,
At least one of the front exterior body and the rear exterior body includes a non-stretchable region provided in the middle in the width direction in the front-rear direction range having the absorber, and a stretchable region provided on both sides in the width direction of the non-stretchable region. And
The elastic region includes an inner sheet layer, an outer sheet layer, and a plurality of elongated elastic elastic members attached along the width direction with a space in the front-rear direction between the inner sheet layer and the outer sheet layer. And an area having
The non-stretchable region includes an inner sheet layer and an outer sheet layer that are continuous from the stretchable region, a remaining cutting portion that is left between the inner sheet layer and the outer sheet layer, and that is continuous from the elastic stretchable member of the stretchable region, and both. An elastic elastic member in the elastic region and an unnecessary elastic elastic member made of at least one of the cut pieces of the elastic elastic member which is not continuous.
The non-stretchable region is provided with a display sheet visible from the outer surface,
In pants-type disposable diapers;
The display sheet is provided adjacent to the inside of the outer sheet layer in the non-stretchable region,
The unnecessary elastic elastic member is non-fixed to the inner surface of the display sheet and the outer surface of the inner sheet layer,
Of the front exterior body and the rear exterior body, the exterior body having the display sheet is such that both the sheet material forming the inner sheet layer and the sheet material forming the outer sheet layer are folded inward at the crotch end. Crotch side folded portion ,
The width direction range of the non-stretchable region includes the width direction range of the inner and outer fixed portions,
The crotch side folded portion has a portion located in the side seal portion, a portion located in the inner / outer fixing portion, and an intermediate portion therebetween.
The portion located in the side seal portion is sandwiched and fixed between the front exterior body and the rear exterior body, and the portion located in the inner / outer fixing portion has an inner surface that is not fixed to the opposing surface and the inner surface is the inner body. Fixed to the intermediate portion, the outer surface is not fixed to the opposite surface,
A pants-type disposable diaper characterized by that.

(Function and effect)
In the present invention, since the display sheet is provided adjacent to the inside of the outer sheet layer in the non-stretchable region, the display on the display sheet can be clearly seen. In addition, since the unnecessary elastic elastic member has a display sheet back non-fixed structure in which the unnecessary elastic elastic member is not fixed to the inner surface of the display sheet and the outer surface of the inner sheet layer, the influence of the shrinkage force of the unnecessary elastic elastic member on the display sheet is affected. It can be completely eliminated. In particular, in the present invention, the exterior body having the display sheet is fixed by folding both the sheet material forming the inner sheet layer and the sheet material forming the outer sheet layer inwardly or outwardly at the crotch end. The crotch side has a folded portion. Therefore, in the exterior body having the display sheet, the gap between the display sheet and the inner sheet layer is closed by the sheet material at the end of the crotch type, so that the gap is surely prevented from opening to the crotch side. As a result, the gap between the display sheet and the inner sheet layer opens to the crotch side, the appearance is deteriorated, the sheet layer of the exterior body is peeled off, or the elastic elastic member cut to kill the elasticity is opened from the opening. It is also possible to reliably prevent the protrusion or the elastic elastic member fragments from coming out of the opening.

<Invention of Claim 4 >
The pants-type disposable diaper according to any one of claims 1 to 3 , wherein the exterior body having the display sheet has the display sheet extended to an end portion on the crotch side.

(Function and effect)
With such a structure, the gap between the display sheet and the inner sheet layer is easily opened to the crotch side. Therefore, the present invention is suitable for such a form.

<Invention of Claim 5 >
The pants-type disposable diaper according to any one of claims 1 to 4 , wherein the unnecessary elastic stretchable member is composed of only a cutting remainder continuous from the elastic stretchable member in the stretchable region.

(Function and effect)
Such a form becomes possible by cutting the elastic stretchable member for forming the non-stretchable region only at one place in the width direction of the non-stretchable region. In this case, the cutting trace (melting trace and pressurization trace) of the sheet layer is reduced, and it is possible to prevent the display sheet from being difficult to see due to the overlap of the cutting traces. When the gap between the inner sheet layer and the inner sheet layer opens to the crotch side, it tends to protrude from the opening. Therefore, the present invention is suitable for such a form.

<Invention of Claim 6 >
The underpants according to claim 5 , wherein the unnecessary elastic elastic member is continuous from the elastic elastic member of the elastic region on one side in the width direction and is longer than the elastic elastic member of the elastic region on the other side in the width direction. Type disposable diapers.

(Function and effect)
Such a form becomes possible by cutting the elastic stretchable member for forming the non-stretchable region at a portion other than the center in the width direction of the non-stretchable region. In this case, not only the cutting trace (melting trace or pressure trace) of the sheet layer is reduced, but also the position of the cutting trace is other than the center, so that it is effective to make it difficult to see the display sheet display due to overlapping cutting traces, etc. However, since the unnecessary elastic elastic member on one side in the width direction remains particularly long, if the gap between the display sheet and the inner sheet layer opens to the crotch side, it tends to protrude from the opening. Therefore, the present invention is suitable for such a form.

  As described above, according to the present invention, it is possible to provide a pants-type disposable diaper with an exterior body division structure that prevents the opening of the crotch end in the exterior body while making the display of the display sheet clearly visible. Is brought about.

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. (A) 5-5 sectional drawing of FIG. 1, (b) 6-6 sectional drawing of FIG. It is a perspective view of a pants type disposable diaper. FIG. 5 is a cross-sectional view corresponding to a 5-5 cross section of FIG. 1. FIG. 5 is a cross-sectional view corresponding to a 5-5 cross section of FIG. 1. FIG. 5 is a cross-sectional view corresponding to a 5-5 cross section of FIG. 1. FIG. 5 is a cross-sectional view corresponding to a 5-5 cross section of FIG. 1. FIG. 5 is a cross-sectional view corresponding to a 5-5 cross section of FIG. 1. FIG. 5 is a cross-sectional view corresponding to a 5-5 cross section of FIG. 1. It is a perspective view of a cutting device. It is an enlarged plan view of a display sheet portion.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 to 6 show an example 100 of a pants-type disposable diaper. The dotted pattern in the cross-sectional view shows an adhesive as a joining means for joining the constituent members located on the front side and the back side, and is a solid, bead, curtain, summit or spiral coating of hot melt adhesive, or pattern coating (Transfer of hot melt adhesive in a relief printing system) or the like, or the fixed portion of the elastic stretchable member is formed by application to the outer peripheral surface of an elastic stretchable member such as a comb gun or a shroud coating instead of or together with this Is. Examples of hot melt adhesives include EVA, adhesive rubber (elastomer), olefin, and polyester / polyamide types, which can be used without any particular limitation. As a joining means for joining the constituent members, means by material welding such as heat sealing or ultrasonic sealing can be used.

  The pants-type disposable diaper 100 of the present embodiment extends from the front exterior body 12F constituting the front body F and the rear exterior body 12B constituting the rear body B and from the front exterior body 12F to the rear exterior body 12B through the crotch part. The exterior body 12F and 12B are provided inside the exterior body 12F, and both side portions of the front exterior body 12F and both side portions of the rear exterior body 12B are joined to form the side seal portion 12A. By being formed, the opening formed by the front and rear end portions of the exterior bodies 12F and 12B becomes a waist opening WO through which the wearer's torso passes, and the lower edge of the exterior bodies 12F and 12B and the interior are formed on both sides in the width direction of the interior body 200. The portions surrounded by the side edges of the body 200 are leg openings LO through which the legs pass. The interior body 200 is a part that absorbs and holds excrement such as urine, and the exterior body 12 is a part that supports the interior body 200 with respect to the wearer's body. The symbol Y indicates the total length of the diaper in the deployed state (the length in the front-rear direction from the edge of the waist opening WO of the front body F to the edge of the waist opening WO of the back body B), and the symbol X indicates the diaper in the deployed state. The full width of is shown.

  Moreover, the pants-type disposable diaper 100 of this embodiment forms a waist region T defined as a front-rear direction range (a front-rear direction range extending from the waist opening WO to the upper end of the leg opening LO) having the side seal portion 12A, and a leg opening LO. And an intermediate region L defined as a front-rear direction range (between the front-rear region having the side seal portion 12A of the front body F and the front-rear region having the side seal portion 12A of the rear body B). The waistline region T can be divided into a “waist portion” W that conceptually forms the edge of the waist opening and a “waist lower portion” U that is a lower portion than this. Usually, in the case where there is a boundary in the waistline region T in which the width direction expansion / contraction stress changes (for example, the thickness or elongation rate of the elastic expansion / contraction member changes), the waist opening WO side is closer to the waist opening than the boundary on the waist opening WO side. When there is no such boundary, the waist opening WO side becomes the waist portion W with respect to the absorbent body 56 or the interior body 200. These lengths in the front-rear direction vary depending on the size of the product and can be determined as appropriate. For example, the waist portion 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 region L are wrapped in a U-shape or a curved shape along the circumference of the leg of the wearer, and this is a portion into which the wearer's leg is put. As a result, the unfolded pants-type disposable diaper has a substantially hourglass shape as a whole.

(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 top sheet 30 on the body side, a liquid-impermeable sheet 11, and an absorbent element 50 interposed therebetween. Yes, it is the main body that has 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 a three-dimensional gather 60 that stands on the body side and is provided on both sides of the interior body 200 in order to prevent excrement from leaking to both sides of the interior body 200.

  The interior body 200 can be fixed to the exterior bodies 12F and 12B by a joining means by material welding such as heat sealing or ultrasonic sealing, or by a hot melt adhesive. In the illustrated embodiment, the inner surface 200 is fixed to the inner surface of the exterior body 12 by a hot melt adhesive applied to the rear surface of the interior body 200, that is, in this case, the back surface of the liquid-impermeable sheet 11 and the attachment portion 65 of the three-dimensional gather 60. Yes. The inner and outer fixing portions 201 for fixing the inner body 200 and the outer bodies 12F and 12B can be provided in almost the entire region where both overlap, and are usually provided in a portion excluding both ends in the width direction of the inner body. preferable.

(Top sheet)
The top sheet 30 has a property of allowing liquid to pass through, 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. .

  The top sheet 30 may be composed of a single sheet or 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.

  In the case of providing the three-dimensional gather 60, both sides of the top sheet 30 pass between the liquid-impermeable sheet 11 and the three-dimensional gather 60 to reach the back side of the absorbent element 50, in order to prevent liquid penetration. It is preferable to join to the permeable sheet 11 and the three-dimensional gather 60.

  For the purpose of preventing displacement of the top sheet 30 with respect to the back side member, the top sheet 30 is preferably fixed to a member adjacent to the back side by a joining means by material welding such as heat sealing or ultrasonic sealing, or a hot melt adhesive. . In the illustrated form, the top sheet 30 is fixed to the surface of the intermediate sheet 40 and the surface of the packaging sheet 58 on the front side of the absorbent body 56 by a hot melt adhesive applied to the back surface thereof.

(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 in order to quickly transfer the liquid that has permeated through the top sheet 30 to the absorber. This intermediate sheet 40 not only improves the absorption performance by 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 materials 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 2.0 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.

  The intermediate sheet 40 is preferably fixed to a member adjacent to the back side by a joining means by material welding such as heat sealing or ultrasonic sealing, or a hot melt adhesive for the purpose of preventing positional displacement with respect to the back side member. . In the illustrated embodiment, the intermediate sheet 40 is fixed to the surface of the portion of the packaging sheet 58 located on the front side of the absorbent body 56 with a hot melt adhesive applied to the back surface thereof.

(Liquid impervious sheet)
The material of the liquid-impermeable 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 provided with a plastic film on the surface of the nonwoven fabric, or a plastic film For example, a laminated sheet in which a nonwoven fabric or the like is laminated and bonded to each other can be exemplified. For the liquid-impermeable sheet 11, it is preferable to use a liquid-impervious and moisture-permeable material that is preferably used 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 microdenier fiber, enhancement of leakproofness by reducing the voids of the fiber by applying heat or pressure, application of superabsorbent resin or hydrophobic resin or water repellent Thus, a sheet that is liquid-impermeable without using a plastic film can also be used as the liquid-impermeable sheet 11.

  The liquid-impermeable sheet 11 has a width that can be accommodated on the back side of the absorbent element 50 as shown in the drawing, and in order to improve leakage prevention, the liquid-impermeable sheet 11 wraps around both sides of the absorbent element 50 to form the side surface of the top sheet 30 of the absorbent element 50. It can also extend to both sides. 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 sheet 11, especially the absorber 56 side surface.

(Three-dimensional gather)
The three-dimensional gather 60 is a belt-like member that extends over the entire front-rear direction along both side portions of the interior body 200, blocks excrement that travels in the lateral direction along the top sheet 30, and prevents side leakage. Is provided. The three-dimensional gather 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 rises 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 three-dimensional gather 60 folds the belt-shaped gather sheet 62 having a length equal to the length in the front-rear direction of the interior body 200 in the width direction and folds it into two. In addition, a plurality of elongated gather elastic elastic members 63 are fixed along the longitudinal direction at intervals in the width direction. A base end portion (an end portion on the side opposite to the sheet folding portion in the width direction) located on the opposite side to the front end portion of the three-dimensional gather 60 is an attachment portion 65 fixed to the back surface of the side edge portion of the interior body 200. A portion other than the attachment portion 65 is a protruding portion 66 (a portion on the folded portion side) protruding from the attachment portion 65. The projecting portion 66 includes a base side portion that extends toward the center in the width direction, and a tip side portion that is folded back outward in the width direction from the tip of the base side portion. This form is a surface contact type three-dimensional gather, but a line contact type three-dimensional gather (not shown) that is not folded outward in the width direction can also be employed. And while the both ends of the front-back direction among the protrusion parts 66 are used as the front-back fixing | fixed part 67 fixed with respect to the side surface of the top sheet 30 in the lying state, the front-back direction intermediate part located between these is not A gathering elastic member 63 extending in the front-rear direction is fixed to the free part 68 in an extended state.

  In the free portion 68 of the three-dimensional gather 60, hot melt adhesives and heat seals and super seals by various coating methods are used to bond the inner layer and the outer layer of the gather sheet 62 and to fix the gather elastic elastic member 63 sandwiched therebetween. At least one of fixing means by material welding such as a sonic seal can be used. Since the flexibility is lost when the entire inner layer and outer layer of the gather sheet 62 are bonded together, it is preferable that the portions other than the bonding portion of the gather elastic elastic member 63 are not bonded or weakly bonded. In the illustrated embodiment, a hot melt adhesive is applied only to the outer peripheral surface of the gather elastic elastic member 63 by an application means such as a comb gun or a sure wrap nozzle, and is sandwiched between the inner layer and the outer layer of the gather sheet 62, thereby collecting the elastic elastic stretch. A structure in which the elongated elastic elastic member is fixed to the inner layer and the outer layer of the gather sheet 62 and the inner layer and the outer layer of the gather sheet 62 are fixed only by the hot melt adhesive applied to the outer peripheral surface of the member 63. It has become.

  Also, hot melt adhesives and heat seals by various application methods are used for fixing the waterproof film 64 and the gather sheet 62 incorporated in the three-dimensional gather 60 and fixing the front and rear fixing portion 67 to the side surface of the interior body 200. Or at least one of means by material welding such as ultrasonic sealing can be used. In the illustrated embodiment, slot application of hot melt adhesive is used for fixing the waterproof film 64. Further, in the illustrated embodiment, the front and rear fixing portion 67 is fixed by combining hot melt adhesive and material welding means, but these can be fixed only by any one of the means.

The gather sheet 62 is made of a spunbond nonwoven fabric (SS, SSS, etc.), SMS nonwoven fabric (SMS, SSMMS, etc.), a melt-blown nonwoven fabric with 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 drawing, a waterproof film 64 can be interposed between the gather sheets folded in two.

  2-6 are preferable and, as for the number of the elongate elastic expansion-contraction members 63 provided in the free part of the three-dimensional gather 60, 3-5 are more preferable. 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 three-dimensional gather 60 can be an appropriate member such as the top sheet 30, the liquid-impermeable sheet 11, the absorbent element 50 in the interior body 200.

  In the three-dimensional gather 60 thus configured, the contraction force of the elongated elastic elastic member 63 acts so that both ends in the front-rear direction are brought close to each other, but the both ends in the front-rear direction of the protruding portion 66 are fixed so as not to 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 positioned on the back surface side of the interior body 200, the three-dimensional gather 60 stands up so as to open outward in the width direction at the crotch portion and in the vicinity thereof. It comes in contact, and the fit is improved.

  The dimensions of the three-dimensional gather 60 can be determined as appropriate, but in the case of an infant paper diaper, for example, as shown in FIG. 3, the standing height of the three-dimensional gather 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, the distance W3 between the folds located on the innermost side in a state where the three-dimensional gather 60 is folded flat so as to be parallel to the surface of the top sheet 30 is preferably 60 to 190 mm, particularly preferably 70 to 140 mm.

  Note that, unlike the illustrated embodiment, the three-dimensional gathers can be provided in double (two rows) 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.

  The absorber 56 may have a rectangular shape, but as shown in FIGS. 1 and 2, the front end portion, the rear end portion, and a constricted portion having a narrower width than the front end portion and the rear end portion are located between them. It is preferable to form an hourglass shape having the shape because the fit of the absorbent body 56 and the three-dimensional gather 60 around the legs is improved.

  Moreover, the dimension of the absorber 56 can be appropriately determined as long as it extends to the front, rear, left and right of the urination port position, but it preferably extends to the peripheral portion of the interior body or the vicinity thereof in the front-rear 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 superabsorbent polymer particles 54, those used for this type of disposable diaper can be used as they are, for example, by sieving (shaking for 5 minutes) using a 500 μm standard sieve (JIS Z8801-1: 2006). The proportion of particles remaining on the top is preferably 30% by weight or less, and the proportion of particles remaining on the screen by sieving (shaking for 5 minutes) using a 180 μm standard sieve (JIS Z8801-1: 2006) 60% by weight or more is 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 70 seconds or less, particularly 40 seconds or less are preferably used. If the water absorption speed is too slow, the liquid supplied into the absorber 56 is likely to cause a so-called reverse return that returns to the outside of the absorber 56.

  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 amount of the liquid excretion site more than 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 edge portions protrude from the front and rear of the absorbent body 56, and the overlapping portion and the overlapping portion of the front and rear protruding portions are joined by a joining means such as hot melt adhesive or material welding.

(Exterior body)
The exterior bodies 12F and 12B include a front exterior body 12F that is a part constituting the front body F and a rear exterior body 12B that is a part constituting the rear body B. The front exterior body 12F and the rear exterior body 12B Are not continuous on the crotch side and are separated in the front-rear direction. This separation distance 12d can be about 150 to 250 mm. A part of the exposed portion of the back surface of the interior body 200 in this separated portion (for example, the entire portion in the front-rear direction of the portion exposed between the front exterior body 12F and the rear exterior body 12B, but does not extend to the front and rear ends of the interior body 200 In addition, it is desirable that the crotch portion cover sheet 12M made of a nonwoven fabric or the like is attached so as to cover the entire side of the interior body 200 so that both side edges in the width direction do not reach the both side edges of the interior body 200, but may be omitted.

  The exterior bodies 12 </ b> F and 12 </ b> B have a waistline portion that is a front-rear direction range corresponding to the waistline region T. In this embodiment, the front exterior body 12F does not have a portion corresponding to the intermediate region L, but the rear exterior body 12B has a collar cover portion 14 that extends from the waist region T to the intermediate region L side. doing. Although not shown, the front exterior body 12F is also provided with a collar cover portion that extends from the waistline region T toward the intermediate region L, a configuration that does not provide a collar cover portion while providing a groin cover portion, and the front exterior body 12F and It is not necessary to provide a portion corresponding to the intermediate region L in both of the rear exterior bodies 12B. Further, in the illustrated embodiment, the lower edge of the buttock cover portion 14 is formed in a straight line shape along the width direction, similarly to the lower edge of the front exterior body 12F, but is positioned on the waist opening side toward the outer side in the width direction. It can also be a curve that becomes

  As shown in FIGS. 3 to 5, the exterior bodies 12 </ b> F and 12 </ b> B are formed by joining the outer sheet layer 12 </ b> S and the inner sheet layer 12 </ b> H by a joining means such as a hot melt adhesive or welding. The sheet material for forming the outer sheet layer 12S and the sheet material for forming the inner sheet layer 12H are individual sheet materials as shown in FIGS. 5, 7, 8, 11, and 12, and 9 and FIG. 10 can be used as a common sheet material. That is, in the latter case, the inner sheet layer 12H and the outer sheet layer 12S are respectively formed by the inner portion and the outer portion of one sheet material folded at the crotch side edge. In the former form, since there are few sheet material folding steps, there is an advantage that the inner sheet layer 12H and the outer sheet layer 12S are not easily displaced, and in the latter form, the number of sheet materials is small. There is.

  As shown in FIG. 10, when the end portions of the sheet material forming the outer sheet layer 12S and the inner sheet layer 12H and the front and rear ends of the interior body 200 are exposed to the waist opening WO, the corners of the sheet material hit the skin and the touch becomes worse. There is a possibility that a waist part W elastic elastic member, which will be described later, or a hot melt adhesive for fixing the same will be exposed. Therefore, as shown in FIGS. 5, 7 to 9, and 11, the sheet material that forms the outer sheet layer 12 </ b> S wraps around the waist side edge of the sheet material that forms the inner sheet layer 12 </ b> H. It is preferable to fold inwardly to form a waist-side folded portion and to extend the waist-side folded portion 12r over the waist-side end of the interior body 200. As shown in FIG. 12, both the sheet material forming the outer sheet layer 12S and the sheet material forming the inner sheet layer 12H are folded inward at the edge on the waist side, and the folded portion 12r is turned to the waist side of the interior body 200. You may extend to the edge part.

The sheet material used for the outer sheet layer 12S and the inner sheet layer 12H can be used without particular limitation as long as it is a sheet, but is preferably a non-woven fabric. 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, the basis weight is preferably about 10 to 30 g / m ² .

Moreover, it is preferable that the total weight of the exterior bodies 12F and 12B is about 20 to 60 g / m ² .

  And in the exterior bodies 12F and 12B, in order to improve the fit to the wearer's torso, elongated elastic elastic members 15 to 19 such as thread rubber are stretched between the outer sheet layer 12S and the inner sheet layer 12H. Is provided at a rate. As the elongated elastic elastic members 15 to 19, synthetic rubber or natural rubber may be used. For bonding the outer sheet layer 12S and the inner sheet layer 12H in the exterior bodies 12F and 12B and fixing the elongated elastic members 15 to 19 sandwiched between them, hot melt adhesives and heat seals by various coating methods are used. At least one of fixing means by material welding such as an ultrasonic seal can be used. Since the flexibility is lost when the entire exterior bodies 12F and 12B are firmly fixed, it is preferable that the portions other than the adhesive portions of the elongated elastic elastic members 15 to 19 are not adhered or weakly adhered. In the illustrated embodiment, a hot melt adhesive is applied only to the outer peripheral surfaces of the elongated elastic elastic members 15 to 19 by an application means such as a comb gun or a sure wrap nozzle, and sandwiched between both sheet layers 12S and 12H, thereby forming the elongated shape. With only the hot melt adhesive applied to the outer peripheral surfaces of the elastic elastic members 15 to 19, fixing the elongated elastic elastic members 15 to 19 to both the sheet layers 12S and 12H and fixing between the two sheet layers 12S and 12H It has a structure to do.

More specifically, between the outer sheet layer 12S and the inner sheet layer 12H in the waist part W of the exterior bodies 12F and 12B, a plurality of waist elastic elastic members 17 are vertically spaced so as to be continuous over the entire width direction. And is fixed in a state of being stretched along the width direction at a predetermined stretch rate. Moreover, about the 1 or several arrange | positioned by the area | region adjacent to the waist lower part U among the waist part elastic elastic members 17, you may overlap with the interior body 200 or the width direction which overlaps with the interior body 200 You may each provide in the width direction both sides except a center part. As the waist resilient and elastic members 17, the thickness 155～1880Dtex, particularly about 470～1240Dtex (the case of synthetic rubber. Cross-sectional area in the case of natural rubber 0.05 to 1.5 mm ^2, in particular 0.1 to 1 the rubber thread .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 elastic elastic member 17 does not need to have the same thickness and elongation rate. For example, the thickness and elongation rate of the elastic elastic member may be different between the upper portion and the lower portion of the waist portion W.

  In addition, a plurality of waist lower elastic elastic members 15 and 19 made of an elongated elastic elastic member are vertically spaced between the outer sheet layer 12S and the inner sheet layer 12H in the waist lower part U of the exterior bodies 12F and 12B. And is fixed in a state of being stretched along the width direction at a predetermined stretch 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. the rubber thread ~1.0mm about ^2), 1 to 15 mm, particularly 5 to 30 present approximately at intervals of 3 to 8 mm, respectively elongation 200-350%, preferably fixed in particular about 240-300%.

  Further, a plurality of cover elastic elastic members 16 made of an elongated elastic elastic member are vertically spaced between the outer sheet layer 12S and the inner sheet layer 12H in the buttock cover part 14 of the rear exterior body 12B. And it is being fixed in the state extended | stretched along the width direction with the predetermined expansion | extension rate.

The cover elastic elastic member 16 has 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 1. It is preferable to fix the thread rubber of about 0 mm ² ) at intervals of 5 to 40 mm, particularly 5 to 20 mm, and stretch ratios of 150 to 300%, particularly 180 to 260%, respectively.

  In the case where an inguinal cover is provided on the front exterior body 12F, a cover elastic member can be provided in the same manner.

  When the elastic elastic members 15, 16, and 19 are provided in the front-rear direction range having the absorbent body 56, such as the waist lower part U and the buttock cover part 14 in the illustrated form, the width of the absorbent body 56 in part or all thereof. In order to prevent shrinkage in the direction, the middle in the width direction (preferably including the entire inner / outer fixing portion 201) including part or all of the portion overlapping the absorbent body 56 in the width direction is defined as the non-stretchable region A1, and its width Both sides in the direction are the stretchable region A2 over the entire width direction. In such a structure, the elastic elastic members 15, 16 and 19 are attached from the one side seal portion 12 </ b> A to the other side seal portion 12 </ b> A across the absorber 56, and the elastic elastic member 15 is formed as the non-elastic region A <b> 1. , 16, 19 are not fixed to the inner sheet layer 12H and the outer sheet layer 12S, and are cut at one place in the middle in the width direction, or almost the entire elastic elastic members 15, 16, 19 are cut finely to expand and contract. The non-stretchable region A1 can be constructed by killing the stretchability while leaving the stretchability in the region A2.

  When elastic elastic members 15, 16, and 19 are not fixed to the inner sheet layer 12H and the outer sheet layer 12S and are cut at one place in the middle in the width direction, as shown in FIG. Between the inner sheet layer 12H and the outer sheet layer 12S, a seal roll 70 provided with a pressing part 71 having a cut projection 72 at the outer peripheral surface and an anvil roll 80 having a smooth surface disposed opposite thereto is described later. Is sandwiched between the cutting projection 72 and the outer peripheral surface of the anvil roll 80 by sandwiching the cutting target to which the display sheet 25 and the elastic elastic members 15 to 17 and 19 are attached, and heating the cutting projection as necessary. It is possible to adopt a method of cutting the elastic elastic members 15, 16, and 19 only at the portions to be removed. In this case, a part of the outer sheet layer 12S may be cut, but it is desirable to cut only the elastic elastic members 15, 16, and 19 only by heating and pressing without cutting the outer sheet layer 12S. In the product subjected to such processing, as shown in FIGS. 14 (a) and 14 (b), a cut mark 22 remains in at least one of the outer sheet layer 12S and the inner sheet layer 12H, and the outer sheet layer 12S and the inner sheet. Between the layers 12H, only the uncut portion that continues from the elastic elastic members 15, 16, and 19 in the elastic region A2 remains as the unnecessary elastic elastic member 18.

  Further, when almost the entire elastic elastic members 15, 16, and 19 are finely cut, as shown in FIG. 13 (b), a seal roll 70 provided with a pressing portion 71 having a large number of cutting projections 73 on the outer peripheral surface; The object to be cut is sandwiched between the inner sheet layer 12H and the outer sheet layer 12S with the display sheet 25 and elastic elastic members 15-17, 19 to be described later between the inner sheet layer 12H and the outer sheet layer 12S. Accordingly, a method of cutting the elastic elastic members 15, 16, and 19 only at a portion sandwiched between the cutting projection 73 and the outer peripheral surface of the anvil roll 80 can be adopted by heating the cutting projection 73 according to the above. . In this case, it may be cut together with the outer sheet layer 12S, but it is desirable to cut only the elastic elastic members 15, 16, and 19 only by heating and pressing without cutting the outer sheet layer 12S. In the product subjected to such processing, as shown in FIG. 14 (c), a cutting trace 22 remains in at least one of the outer sheet layer 12S and the inner sheet layer 12H, and between the outer sheet layer 12S and the inner sheet layer 12H. The elastic remaining members that are continuous from the elastic elastic members 15, 16, and 19 in the elastic region A2 and the cut pieces of the elastic elastic members that are not continuous with the elastic elastic members 15, 16, and 19 in both elastic regions A2 are unnecessary. It will remain as 18.

(Display sheet)
Characteristically, a display sheet 25 having a character or the like is interposed in the non-stretchable region A1 of at least one of the front exterior body 12F and the rear exterior body 12B so as to be adjacent to the inside of the outer sheet layer 12S. The display of the display sheet 25 can be seen through the outer sheet layer 12S. The display sheet 25 is a base sheet made of paper or non-woven fabric, a decorative pattern (including pictures and one-point characters), usage instructions, usage assistance, function indications such as size, or the manufacturer or product name. It is possible to preferably use a display such as a mark display such as a characteristic function added by printing or the like.

  Characteristically, in order to completely eliminate the influence of the contraction force of the unnecessary elastic elastic member 18 on the display sheet 25, the unnecessary elastic elastic member 18 is not applied to the inner surface of the display sheet 25 and the outer surface of the inner sheet layer 12H. It is fixed. Furthermore, the inner surface of the display sheet 25, the unnecessary elastic elastic member 18 and the outer surface of the inner sheet layer 12H may be unfixed to each other. That is, the outer surface of the display sheet 25 and the inner surface of the inner sheet layer 12H can be fixed to the opposite surface by a fixing means such as a hot melt adhesive, but the inner surface of the display sheet 25, the unnecessary elastic elastic member 18 and the inner surface. The outer surface of the sheet layer 12H is not fixed to the opposite surface by a fixing means such as a hot melt adhesive. As a result, a continuous gap is formed on the back side of the display sheet 25. In order to prevent the unnecessary elastic elastic member 18 from being fixed, a part of the elastic elastic members 15, 16, 19 in the non-expandable region A 1 is manufactured by fixing the inner side surface of the display sheet 25 by a fixing means such as a hot melt adhesive. Do not fix to the outer surface of the inner sheet layer 12H.

(Crotch side folded part)
Characteristically, the front exterior body 12F and the rear exterior body 12B in the form shown in FIGS. 5, 7, and 8 are configured such that the sheet material forming the outer sheet layer 12S is the inner sheet layer 12H at the end of the crotch side. The crotch-side folded portion 20 is formed by folding back inside, and the crotch-side folded portion 20 is fixed so as not to open. Therefore, since the gap 12i between the display sheet 25 and the inner sheet layer 12H in the front exterior body 12F and the rear exterior body 12B is closed by the sheet material at the end of the crotch type, the gap 12i may open to the crotch side. It is surely prevented. As a result, when the gap 12i between the display sheet 25 and the inner sheet layer 12H opens to the crotch side, the appearance deteriorates, the inner sheet layer 12H and the outer sheet layer 12S of the exterior bodies 12F and 12B peel, Therefore, it is possible to reliably prevent the unnecessary elastic elastic member 18 cut in order to kill the property from sticking out of the opening or coming out of the opening. Further, when the outer sheet layer 12S is folded back inside the inner sheet layer 12H to form the crotch side folded portion 20 as in this embodiment, the folded portion of the outer sheet layer 12S is not exposed on the outer surface of the diaper, so that the appearance is deteriorated by folding Can be prevented . On the contrary, as in the form shown in FIG. 11, the present invention does not include a structure in which the sheet material forming the inner sheet layer 12H is folded outside the outer sheet layer 12S at the crotch end.

As for the fixing structure of the crotch side folded portion 20, in the present invention, as shown in FIG. 5, the crotch side folded portion 20 is fixed by other members such as the inner and outer fixing portions 201 as a result. And fix it. In a portion located inside and outside the fixed portion 201, the crotch-side folded portion 20 as shown in FIG. 7 and shall be fixed to the opposite surface through the hot melt adhesive, to indicate a sealed portion at reference numeral 21 in FIG. 8 In addition, it is not included in the present invention that the crotch side folded portion 20 is sealed together with the original portion by means of material welding such as heat sealing or ultrasonic sealing.

When the outer sheet layer 12S and the inner sheet layer 12H of the front exterior body 12F and the rear exterior body 12B are formed with a common sheet material, as shown in FIGS. A form in which the inner sheet layer 12H and the outer sheet layer 12S of the front exterior body 12F and the rear exterior body 12B are respectively formed by the inner part and the outer part of the folded sheet material is included in the present invention. Not . Even in such a configuration, the gap 12i between the display sheet 25 and the inner sheet layer 12H in the front exterior body 12F and the rear exterior body 12B is closed by the sheet material at the end of the crotch type, so that the gap 12i is on the crotch side. Opening is reliably prevented.

Further, as in the form shown in FIG. 12, both the sheet material forming the inner sheet layer 12H and the sheet material forming the outer sheet layer 12S in the front exterior body 12F and the rear exterior body 12B are located at the crotch end. A form in which the crotch-side folded part 20 is formed by folding outward is not included in the present invention, but a form folded inward is included in the present invention . Even in such a configuration, the gap 12i between the display sheet 25 and the inner sheet layer 12H in the front exterior body 12F and the rear exterior body 12B is closed by the sheet material at the end of the crotch type, so that the gap 12i is on the crotch side. Opening is reliably prevented.

  As can be seen from these various forms, the folding length of the crotch-side folded portion 20 can be determined as appropriate, and in addition to a short portion of about 5 to 30 mm, as shown in FIGS. 9 and 10 The length of the exterior body having the folded portion may be approximately the same as the longitudinal length.

  As described above, in the present invention, since the gap 12i between the display sheet 25 and the inner sheet layer 12H is difficult to open to the crotch side, the display sheet 25 is an end portion on the crotch side of the front exterior body 12F and the rear exterior body 12B. The display area can be widened and a large display area can be secured. Therefore, the separation distance 25e between the crotch side edge of the display sheet 25 and the crotch side edges of the front exterior body 12F and the rear exterior body 12B having the display sheet 25 can be about 5 to 30 mm.

  As described above, the elastic elastic members 15, 16, and 19 for forming the non-stretchable region A1 are cut at only one position in the width direction of the non-stretchable region A1, thereby FIG. As shown to b), it is a preferable form that the unnecessary elastic elastic member 18 consists only of the cutting remainder continuous from the elastic elastic member of expansion-contraction area | region A2. In this case, there is an advantage that the display of the display sheet 25 is difficult to see due to the fact that the cut traces 22 are reduced and the cut traces 22 overlap. In particular, as shown in FIG. 14 (b), when cutting the elastic elastic members 15, 16, and 19 for forming the non-stretchable region A1 is cut at other than the center in the width direction of the non-stretchable region A1, This is preferable because the position becomes other than the center and the display on the display sheet 25 is hardly obstructed. In this case, the unnecessary elastic elastic member 18 continues for a long time from the elastic elastic member of the elastic region A2 on one side in the width direction, but the gap 12i between the display sheet 25 and the inner sheet layer 12H is difficult to open to the crotch side. Therefore, it will not be a problem.

(Other)
In the above example, the crotch-side folded portion 20 is provided on both the front exterior body 12F and the rear exterior body 12B, but only one of them can be provided (although both have display sheets 25, only one Including the case of applying the structure of the invention).

<Explanation of terms in the specification>
The following terms in the specification have the following meanings unless otherwise specified in the specification.
The “front / rear (vertical) direction” means a direction connecting the ventral side (front side) and the back side (rear side), and the “width direction” means a direction (left / right direction) orthogonal to the front / rear direction.

  “Elongation rate” means a value when the natural length is 100%.

-"Gel strength" is measured as follows. Artificial urine (urea: 2 wt%, sodium chloride: 0. 8 wt%, calcium chloride dihydrate:. 0 0 3wt%, magnesium sulfate heptahydrate:. 0 0 8wt%, and ion-exchanged water: 97.09 wt%) 49.0 g, 1.0 g of the superabsorbent polymer is added and stirred with a stirrer. The produced gel is left in a constant temperature and humidity chamber of 40 ° C. × 60% RH for 3 hours and then returned to room temperature, and the gel strength is measured with a card meter (Curdmeter-MAX ME-500, manufactured by I.techno Engineering).

  ・ "Weight" is measured as follows. After the sample or test piece has been pre-dried, it is left in a test room or apparatus in a standard state (test location is temperature 20 ± 5 ° C., relative humidity 65% or less) to obtain a constant weight. Pre-drying refers to making a sample or test piece constant in an environment where the relative humidity is 10 to 25% and the temperature does not exceed 50 ° C. In addition, it is not necessary to perform preliminary drying about the fiber whose official moisture content is 0.0%. A sample with a size of 200 mm × 250 mm (± 2 mm) is cut out from the test piece in a constant weight using a rice-basis plate (200 mm × 250 mm, ± 2 mm). Measure the weight of the sample, multiply it by 20, calculate the weight per square meter, and use it as the basis weight.

- "thickness" is used automatic thickness measuring instrument (KES-G5 Handy Compression measurement program), load: 10 gf / cm ^2, and the pressure area: automatically measured under the conditions of 2 cm ^2.

  -The amount of water absorption is measured according to JIS K7223-1996 "Test method for water absorption of superabsorbent resin".

  ・ The water absorption rate is the “time to end point” when JIS K7224-1996 “Test method for water absorption rate of superabsorbent resin” is performed using 2 g of superabsorbent polymer and 50 g of physiological saline. .

  ・ If there is no description about the environmental conditions in the test and measurement, the test and measurement shall be performed in a test room or equipment in the standard condition (test location is temperature 20 ± 5 ℃, relative humidity 65% or less). .

  The present invention can be used for pants-type disposable diapers such as the above examples.

  A1 ... non-stretchable region, A2 ... stretchable region, L ... intermediate region, LO ... leg opening, T ... waist circumference region, U ... waist lower part, W ... waist part, WO ... waist opening, 11 ... liquid impermeability Sheet, 12 ... exterior body, 12A ... side seal part, 12F ... front side exterior body, 12B ... rear side exterior body, 12H ... inner sheet layer, 12S ... outer sheet layer, 12i ... gap, 12r ... waist side folded part, 14 DESCRIPTION OF SYMBOLS ... Butt part cover part, 18 ... Unnecessary elastic elastic member, 20 ... Crotch side folding part, 22 ... Cutting trace, 25 ... Display sheet, 30 ... Top sheet, 40 ... Intermediate sheet, 50 ... Absorbing element, 56 ... Absorber, 58 ... Packaging sheet, 60 ... Solid gather, 62 ... Gather sheet, 200 ... Interior body, 201 ... Inside / outside fixing part.

Claims (6)

A front exterior body that constitutes the front body and a rear exterior body that constitutes the rear body, and an interior body including an absorbent body provided at the center in the width direction from the inner surface of the front exterior body to the inner surface of the rear exterior body. Prepared,
An inner / outer fixing portion that fixes the front exterior body and the rear exterior body to the interior body, a side seal portion in which both side portions of the front exterior body and both side portions of the rear exterior body are joined, and a waist opening and a parts and pair of leg openings,
The front exterior body and the rear exterior body are spaced apart in the front-rear direction,
At least one of the front exterior body and the rear exterior body includes a non-stretchable region provided in the middle in the width direction in the front-rear direction range having the absorber, and a stretchable region provided on both sides in the width direction of the non-stretchable region. And
The elastic region includes an inner sheet layer, an outer sheet layer, and a plurality of elongated elastic elastic members attached along the width direction with a space in the front-rear direction between the inner sheet layer and the outer sheet layer. And an area having
The non-stretchable region includes an inner sheet layer and an outer sheet layer that are continuous from the stretchable region, a remaining cutting portion that is left between the inner sheet layer and the outer sheet layer, and that is continuous from the elastic stretchable member of the stretchable region, and both. An elastic elastic member in the elastic region and an unnecessary elastic elastic member made of at least one of the cut pieces of the elastic elastic member which is not continuous.
The non-stretchable region is provided with a display sheet visible from the outer surface,
In pants-type disposable diapers;
The display sheet is provided adjacent to the inside of the outer sheet layer in the non-stretchable region,
The unnecessary elastic elastic member is non-fixed to the inner surface of the display sheet and the outer surface of the inner sheet layer,
The exterior body having the display sheet of the front exterior body and the rear exterior body has a crotch side folded portion where a sheet material forming the outer sheet layer is folded back inside the inner sheet layer at an end portion on the crotch side. has,
The width direction range of the non-stretchable region includes the width direction range of the inner and outer fixed portions,
The crotch side folded portion has a portion located in the side seal portion, a portion located in the inner / outer fixing portion, and an intermediate portion therebetween.
The portion located in the side seal portion is sandwiched and fixed between the front exterior body and the rear exterior body, and the portion located in the inner / outer fixing portion has an inner surface that is not fixed to the opposing surface and the inner surface is the inner body. Fixed to the intermediate portion, the outer surface is not fixed to the opposite surface,
A pants-type disposable diaper characterized by that.   The pants-type disposable diaper according to claim 1, wherein the exterior body having the display sheet individually includes a sheet material forming the inner sheet layer and a sheet material forming the outer sheet layer. A front exterior body that constitutes the front body and a rear exterior body that constitutes the rear body, and an interior body including an absorbent body provided at the center in the width direction from the inner surface of the front exterior body to the inner surface of the rear exterior body. Prepared,
An inner / outer fixing portion that fixes the front exterior body and the rear exterior body to the interior body, a side seal portion in which both side portions of the front exterior body and both side portions of the rear exterior body are joined, and a waist opening and a parts and pair of leg openings,
The front exterior body and the rear exterior body are spaced apart in the front-rear direction,
At least one of the front exterior body and the rear exterior body includes a non-stretchable region provided in the middle in the width direction in the front-rear direction range having the absorber, and a stretchable region provided on both sides in the width direction of the non-stretchable region. And
The elastic region includes an inner sheet layer, an outer sheet layer, and a plurality of elongated elastic elastic members attached along the width direction with a space in the front-rear direction between the inner sheet layer and the outer sheet layer. And an area having
The non-stretchable region includes an inner sheet layer and an outer sheet layer that are continuous from the stretchable region, a remaining cutting portion that is left between the inner sheet layer and the outer sheet layer, and that is continuous from the elastic stretchable member of the stretchable region, and both. An elastic elastic member in the elastic region and an unnecessary elastic elastic member made of at least one of the cut pieces of the elastic elastic member which is not continuous.
The non-stretchable region is provided with a display sheet visible from the outer surface,
In pants-type disposable diapers;
The display sheet is provided adjacent to the inside of the outer sheet layer in the non-stretchable region,
The unnecessary elastic elastic member is non-fixed to the inner surface of the display sheet and the outer surface of the inner sheet layer,
Of the front exterior body and the rear exterior body, the exterior body having the display sheet is such that both the sheet material forming the inner sheet layer and the sheet material forming the outer sheet layer are folded inward at the crotch end. Crotch side folded portion ,
The width direction range of the non-stretchable region includes the width direction range of the inner and outer fixed portions,
The crotch side folded portion has a portion located in the side seal portion, a portion located in the inner / outer fixing portion, and an intermediate portion therebetween.
The portion located in the side seal portion is sandwiched and fixed between the front exterior body and the rear exterior body, and the portion located in the inner / outer fixing portion has an inner surface that is not fixed to the opposing surface and the inner surface is the inner body. Fixed to the intermediate portion, the outer surface is not fixed to the opposite surface,
A pants-type disposable diaper characterized by that. The pants-type disposable diaper according to any one of claims 1 to 3 , wherein the exterior body having the display sheet has the display sheet extended to an end portion on the crotch side. The pants-type disposable diaper according to any one of claims 1 to 4 , wherein the unnecessary elastic stretchable member is composed of only a cutting remainder continuous from the elastic stretchable member in the stretchable region. The underpants according to claim 5 , wherein the unnecessary elastic elastic member is continuous from the elastic elastic member of the elastic region on one side in the width direction and is longer than the elastic elastic member of the elastic region on the other side in the width direction. Type disposable diapers.

Images