JP2018033748A - Pants-type disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pants-type disposable diaper which can fill a gap in the back of a diaper according to the user's choice and can assist absorption of a portion where the gap is filled. SOLUTION: In the above problem, a pocket 20 for inserting an absorbent material 28 having an insertion port 21 on the waist opening WO side is provided inside the elastic member in the rear exterior body 12B, and the pocket 20 is on the skin side. This is solved by a pants-type disposable diaper characterized in that a large number of holes 22 penetrating inside and outside the pocket 20 are formed on the wall portion of the pocket 20 at intervals. [Selection diagram] FIG. 12

Description

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

  In the disposable diaper, a gap is formed between the back part of the diaper and the body surface, and excrement such as urine, watery stool, and loose stool may leak through the gap (back leakage). This problem of back leakage can also occur in a pants-type disposable diaper that is said to have a relatively high fit. For this reason, the technique which aims at prevention of the back leak of a pants type disposable diaper conventionally is proposed.

  For example, Patent Document 1 proposes to provide a back-side barrier body along the width direction on the back-side inner surface. However, such a barrier body cannot adjust thickness and cushioning properties, and cannot cope with a user who does not need the barrier body.

  On the other hand, as described in [0091] of Patent Document 2, when a sponge body is provided on the bag body provided on the inner surface on the back side, the bag body elastically blocks the gap between the diaper and the wearer's back. This effectively prevents leakage from the back side. In this case, if the sponge body is taken out, the user can select the use of the cushion material.

  However, since the thing described in the cited document 2 is used for wiping the body by inserting a hand, even if the gap can be closed, it cannot be absorbed.

JP 2009-034270 A JP 2010-233605 A

  Then, the main subject of this invention is providing the underpants type disposable diaper which can fill the clearance gap of the back of a diaper by a user's selection, and can also absorb absorption in the part which filled the clearance gap.

A typical aspect of the present invention that solves the above problems is as follows.
<First aspect>
An integral exterior body from the front body to the back body, or an exterior body provided separately for the front body and the back body;
An interior body including an absorbent body extending in the front-rear direction from the front body to the back body and joined to the exterior body;
Side seal portions in which both side portions of the exterior body in the front body and both side portions of the exterior body in the back body are joined,
In a pants-type disposable diaper with a waist opening and a pair of left and right leg openings,
An elastic member that elastically expands and contracts in the width direction is provided on the outer body of the back body in the waist area corresponding to the side seal portion and the front-rear direction range,
Inside the outer body of the outer body of the back body, a pocket for inserting an absorbent material having an insertion port on the waist opening side is provided, and on the skin side wall portion of the pocket, inside and outside of the pocket A number of through holes are formed at intervals,
A pants-type disposable diaper characterized by that.

(Function and effect)
In the waist area, an absorbent material insertion pocket having an insertion opening on the waist opening side is provided on the inner side of the elastic member of the outer body of the back body, so that the user can roll or fold the pocket inside the pocket. By inserting an appropriate disposable absorbent material such as tissue paper as necessary, the gap between the diaper causing back leakage and the back of the wearer can be filled. In addition to filling the gap, a large number of holes are formed in the part, so that the absorbent material in the pocket can absorb and hold the liquid through the holes, so back leakage is prevented. This can be prevented more effectively.

<Second aspect>
The outer body of the back body has an inner sheet layer made of a water-repellent or hydrophobic nonwoven fabric, and an outer sheet layer made of a water-repellent or hydrophobic nonwoven fabric, and the inner sheet layer and the outer sheet layer between the inner sheet layer and the outer sheet layer. The elastic member is sandwiched,
The nonwoven fabric forming at least one of the inner sheet layer and the outer sheet layer is folded inward from the inner sheet layer and the outer sheet layer at the edge of the waist opening, and the folded portion is crotch side from the waist opening. And a front side portion that is folded back on the crotch side and extends to the waist opening side,
At least a pair of joint portions that join the front side portion and the back side portion are provided at intervals in the width direction, and the non-joint portions between these joint portions are the pockets,
The underpants type disposable diaper of a 1st aspect.

(Function and effect)
In the form of filling the gap in the back described in Patent Document 2, a process of separately manufacturing and attaching the bag body is required, which complicates the manufacturing and increases the cost. On the other hand, when the pocket is formed using the sheet material for forming the exterior body as described above, it can be manufactured without increasing the number of manufacturing steps as described later. Moreover, a water-repellent or hydrophobic non-woven fabric is widely used as the material of the outer package, but in the present invention, since a large number of holes are formed in the pocket, the absorption function by the pocket is not hindered.

<Third Aspect>
The non-woven fabric forming both the inner sheet layer and the outer sheet layer is folded back to the inner side of the inner sheet layer and the outer sheet layer at the edge of the waist opening, and the folded portion is located on the crotch side from the waist opening. While having a back side portion that extends and a front side portion that is folded back on the crotch side and extends to the waist opening side,
Between the nonwoven fabric of the portion located on the front side of the pocket in the front side portion, an elastic member that elastically expands and contracts in the width direction is provided.
The underpants type disposable diaper of a 2nd aspect.

(Function and effect)
Thereby, since the front side part which is a wall part by the side of the skin of a pocket is elastically pressed with respect to a back side part, the absorber inserted in the pocket comes to be hold | maintained firmly in a pocket.

<Fourth aspect>
As the pocket, a plurality of vertically long pockets are provided at intervals in the width direction, and in the portion located between adjacent pockets, the back side portion is not joined to the member located outside the pocket,
The underpants type disposable diaper of the 2nd or 3rd aspect.

(Function and effect)
In this embodiment, the gap filling material is inserted into both of the adjacent pockets, so that the back side portion between the adjacent pockets is lifted from the further outer member, and a gap opening on the crotch side is formed. Therefore, while filling the gap with the absorbent material inserted in the pocket to prevent the leakage of excrement, the excrement is introduced into the gap between the adjacent pockets and clogged between the adjacent pockets. Can be prevented.

<Fifth aspect>
The portion located on the back side of the pocket in the back side portion is not joined to the member located on the outside thereof, and a large number of holes penetrating the inside and outside of the pocket are formed in the back side portion with a space therebetween. ing,
The underpants type disposable diaper of any one aspect of 2nd-4th.

(Function and effect)
In this form, absorption into the pocket is possible not only from the skin side (front side) of the pocket but also from the back side.

<Sixth aspect>
As the pocket, a plurality of vertically elongated pockets are provided in the width direction within the width direction range having the interior body,
The underpants type disposable diaper of any one aspect of 1st-5th.

(Function and effect)
It is preferable to provide a plurality of such vertically long pockets in the width direction because the user can freely select a pocket into which the absorbent material is inserted. Further, it is preferable that the gap filling action by each pocket functions independently, so that the fit to the unevenness of the wearer's back becomes good.

  As described above, according to the present invention, there are advantages such as a pants-type disposable diaper that can fill the gap in the back of the diaper according to the selection of the user and can also absorb absorption in the portion where the gap is filled. Brought about.

It is an expanded state top view which shows the inner surface of a pants type disposable diaper. It is an expanded state top view which shows 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. It is an expanded state top view which shows the outer surface of a pants type disposable diaper. (A) 5-5 sectional drawing of FIG. 7, (b) 6-6 sectional drawing of FIG. (A) Top view of rear side exterior body, (b) 7-7 sectional view, and (c) 8-8 sectional view. (A) Top view of rear side exterior body, (b) 7-7 sectional view, and (c) 8-8 sectional view. (A) Plan view of rear exterior body, (b) 7-7 sectional view, (c) 9-9 sectional view, and (d) 8-8 sectional view. It is a perspective view which shows the principal part of the inner surface of a wearing diaper. It is a perspective view which shows the principal part of the inner surface of a wearing diaper. (A) 5-5 sectional drawing of FIG. 1, (b) 6-6 sectional drawing of FIG. It is a perspective view which shows the manufacturing process of an exterior body roughly. It is a top view which shows the various patterns of a hole.

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 method) or the like, or the fixing portion of the elastic member is formed by application to the outer peripheral surface of the elastic member such as a comb gun or a sheath coating instead of or together with this is there. 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 interior body 200 is provided, and both side portions of the front exterior body 12F and both side portions of the rear exterior body 12B are joined to form a side seal portion 12A, so that the front and back of the exterior bodies 12F and 12B are formed. The opening formed by the end portion becomes a waist opening WO through which the wearer's torso passes, and the portions surrounded by the lower edges of the exterior bodies 12F and 12B and the side edges of the interior body 200 on both sides in the width direction of the interior body 200 are legs. It becomes the leg opening LO through which it passes. The interior body 200 is a portion that absorbs and holds excrement such as urine, and the exterior bodies 12F and 12B are portions that support 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, when there is a boundary (for example, the thickness or elongation rate of the elastic member changes) in the waistline region T, the waist opening WO side is closer to the waist portion W 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 from 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 bounded in a U shape or a curved shape so as to follow the circumference of the wearer's leg, and this is a portion along the circumference of the wearer's leg. 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 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 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 of the exterior body 12F, 12B is fixed by the hot melt adhesive applied to the back surface of the interior body 200, that is, the back surface of the liquid-impermeable sheet 11 and the mounting portion 65 of the three-dimensional gather 60 in this case. Has been. 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 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 fixed free portion 68 is provided, and a gather elastic member 63 extending in the front-rear direction is fixed to the free portion 68 in an extended state.

  In the free part 68 of the three-dimensional gather 60, a hot melt adhesive, heat seal and ultrasonic waves 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 member 63 sandwiched therebetween. At least one of fixing means by material welding such as a 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 member 63 are not bonded or bonded weakly. In the illustrated embodiment, a hot melt adhesive is applied only to the outer peripheral surface of the gather elastic member 63 by an application means such as a comb gun or a sure wrap nozzle, and sandwiched between the inner layer and the outer layer of the gather sheet 62, thereby collecting the gather elastic member 63. Only the hot melt adhesive applied to the outer peripheral surface of the sheet member is used to fix the elongated elastic member to the inner layer and the outer layer of the gather sheet 62 and to fix the inner layer and the outer layer of the gather sheet 62. Yes.

  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 member 63, thread rubber 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.

  The number of the elongated elastic members 63 provided in the free part of the three-dimensional gather 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 member 63, it will become easy to hit | skin with respect to skin. The elongated 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 configured as described above, the contraction force of the elongated elastic member 63 acts so as to bring the both ends in the front-rear direction close to each other. Thus, since they are non-fixed free portions, only the free portions stand so as to abut on 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 the 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. Moreover, as shown in FIG.7 and FIG.8, the exterior body 12 can also be made into the integrated body which continues between crotches from the front body F to the back body B. That is, the exterior bodies 12F and 12B separately provided on the front body F and the back body B correspond to the former form, and the integrated exterior body 12 extending from the front body F to the back body B corresponds to the latter form.

  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 include an outer sheet layer 12 </ b> S located outside the elastic members 15 to 19 and an inner sheet layer 12 </ b> H located inside the elastic members 15 to 19. And bonded by a joining means such as 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 and 8, or a common sheet material (not shown). It can also be.

The sheet material used for the outer sheet layer 12S and the inner sheet layer 12H can be used without any particular limitation, but is preferably a non-woven fabric. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, Nonwoven fabrics composed of mixed fibers, composite fibers or the like in which more than one species are used can be used. 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 .

(Extensible / non-extensible area)
The exterior bodies 12F and 12B are provided with elastic members 15 to 19 between the outer sheet layer 12S and the inner sheet layer 12H in order to enhance the fit of the wearer around the torso. An expansion / contraction region that elastically expands and contracts is formed. As the elastic members 15 to 19, a slender elastic member such as rubber thread as shown in the figure, or a net-like elastic member or a film-like elastic member (elastic film) can be used. In the stretchable region, in the natural length state, the outer sheet layer 12S and the inner sheet layer 12H contract as the elastic members 15-19 contract, forming wrinkles or wrinkles, and the elastic members 15-19 in the width direction. When extended, the outer sheet layer 12 </ b> S and the inner sheet layer 12 </ b> H can be extended to a predetermined extension rate that can be fully extended. As the 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 elastic members 15 to 19 sandwiched therebetween, hot melt adhesives, heat seals and ultrasonic seals by various coating methods are used. It is possible to use at least one of fixing means such as material welding. Since the flexibility is lost when the entire exterior bodies 12F and 12B are firmly fixed, it is preferable that portions other than the bonded portions of the elastic members 15 to 19 are not bonded or are bonded weakly. In the illustrated embodiment, a hot melt adhesive is applied only to the outer peripheral surfaces of the elastic members 15 to 19 by an application means such as a comb gun or a sure wrap nozzle, and is sandwiched between the sheet layers 12S and 12H, whereby the elastic members 15 to 19 are applied. The elastic members 15 to 19 are fixed to the two sheet layers 12S and 12H and the two sheet layers 12S and 12H are fixed only by the hot melt adhesive applied to the outer peripheral surface. The elastic members 15 to 19 can be fixed to the outer sheet layer 12S and the inner sheet layer 12H only at both ends in the expansion / contraction direction in the expansion / contraction region.

The illustrated form will be described in more detail. 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 members 17 are vertically arranged so as to be continuous over the entire width direction. It is attached at intervals in the direction. Moreover, about the 1 or several arrange | positioned by the area | region adjacent to the waist lower part U among the waist part elastic members 17, you may overlap with the interior body 200 or the width direction center which overlaps with the interior body 200 You may provide each in the width direction both sides except a part. The waist elastic member 17 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. the rubber thread 0mm approximately ²⁾ is preferably provided about 3 to 22 present at intervals of 4 to 12 mm, the width direction of elongation of the waist portion W by which is about 150% to 400%, in particular 220 to 320 percent Is preferred. Further, the waist portion W does not need to use the waist elastic member 17 having the same thickness in all of the front and rear directions or have the same elongation rate, for example, the thickness of the elastic member 17 at the upper portion and the lower portion of the waist portion W The expansion rate may be different.

  Further, 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, a plurality of waist lower part elastic members 15 and 19 are attached at intervals in the vertical direction.

The waist lower 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 the rubber thread of 1.0mm about ^2), 1 to 15 mm, particularly preferably to dispose 5-30 present at intervals of 3 to 8 mm, which width direction of elongation of the waist lower portion U by 200 to 350% In particular, it is preferably about 240 to 300%.

  Further, a plurality of cover part elastic members 16 are attached at intervals in the vertical direction between the outer sheet layer 12S and the inner sheet layer 12H in the buttock cover part 14 of the rear exterior body 12B.

The cover elastic member 16 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 1.0 mm. ^It is preferable to provide about 2 to 10 thread rubbers with an interval of 5 to 40 mm, particularly 5 to 20 mm, and the elongation ratio in the width direction of the cover portion is 150 to 300%, particularly 180 to 260%. Is preferred.

  In the case of providing a groin cover portion on the front exterior body 12F, a cover portion elastic member can be similarly provided.

  When the elastic members 15, 16, 19 are provided in the front-rear direction range having the absorbent body 56 like the waist lower part U and the buttock cover part 14 in the illustrated form, the width direction of the absorbent body 56 is partly or entirely. In order to prevent the shrinkage, the intermediate in the width direction (preferably including the entire inner and 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 the width direction Both sides are taken as the stretchable area A2. Although it is preferable that the waist part W is made into the expansion-contraction area | region A2 over the whole width direction, you may provide a non-expansion-contraction area | region in the width direction middle similarly to the waist lower part U.

(Display sheet)
As shown in FIGS. 2 and 5, and FIGS. 7 and 8, a display sheet 25 having characters printed on the outer surface is provided in the non-stretchable region A1 of at least one of the front exterior body 12F and the rear exterior body 12B. Can be built in. When the display sheet 25 is provided adjacent to the inner surface of the outermost sheet layer, it is close to the outer surface of the product and is easy to see. Therefore, the display sheet 25 is provided adjacent to the inner surface of the outer sheet layer 12S as illustrated. However, it may be provided adjacent to the outer surface of the inner sheet layer 12H, or may be provided adjacent to the inner surface of the inner sheet layer 12H.

(Formation of non-stretchable area)
The stretchable region A2 and the non-stretchable region A1 supply elastic members 15 to 17 and 19 between the inner sheet layer 12H and the outer sheet layer 12S in which the display sheet 25 is fixed to the inner surface with a hot melt adhesive. The members 15, 16, and 19 are fixed via hot-melt adhesive at least at both ends in the expansion / contraction direction in the expansion / contraction region A 2, and are not fixed in the region that becomes the non-extension / contraction region A 1, but elastic The members 15, 16, and 19 are cut by pressing and heating at one position in the middle of the width direction, or almost the entire elastic members 15, 16, and 19 are cut finely by pressing and heating, and are expanded and contracted to the expansion / contraction region A2. The non-stretchable region A1 can be constructed by killing stretchability while leaving the property.

  FIG. 15 (a) shows a case where the elastic members 15, 16, 19 are cut at one place in the middle of the width direction, and the pressurizing part 71 having a cutting projection 72 at one place in the circumferential direction is shown on the outer periphery. The display sheet 25 is provided between the inner sheet layer 12H and the outer sheet layer 12S by a seal roll 70 in which the cutting projection 72 is heated to a desired temperature, and an anvil roll 80 having a smooth surface disposed opposite thereto. Further, the elastic member 15 to 17 and 19 is attached to the cutting target so that the inner sheet layer 12H is on the seal roll side, and only the portion sandwiched between the cutting projection 72 and the outer peripheral surface of the anvil roll 80 is an elastic member. 15, 16 and 19 are cut by pressurizing and heating. In the product subjected to such processing, at least a portion compressed or melted at the time of cutting remains as a cutting trace 12m in the outer sheet layer 12S, and a stretchable region is formed between the outer sheet layer 12S and the inner sheet layer 12H. Only the remaining cutting portion continuous from the elastic members 15, 16, 19 of A <b> 2 remains as the unnecessary elastic member 18.

  FIG. 15B shows a case where almost the entire elastic members 15, 16, and 19 are cut finely. The pressing portion 71 having a large number of cutting projections 73 is provided on the outer peripheral surface, and the cutting projections are provided. The display sheet 25 and the elastic members 15 to 17, 72 are provided between the inner sheet layer 12 </ b> H and the outer sheet layer 12 </ b> S by a seal roll 70 in which 72 is heated to a desired temperature and an anvil roll 80 having a smooth surface disposed opposite thereto. 19 is sandwiched so that the inner sheet layer 12H is on the seal roll side, and the elastic members 15, 16, and 19 are added only to the portion sandwiched between the cutting projection 73 and the outer peripheral surface of the anvil roll 80. Cutting is performed by pressure and heating. In the product subjected to such processing, at least a portion compressed or melted at the time of cutting remains as a cutting trace 12m in the outer sheet layer 12S, and a stretchable region is formed between the outer sheet layer 12S and the inner sheet layer 12H. The remaining cut portion that continues from the elastic members 15, 16, and 19 of A2 and the cut piece of the elastic member that is not continuous with the elastic members 15, 16, and 19 of both the stretchable regions A <b> 2 remain as the unnecessary elastic member 18.

  The heating temperature for cutting the elastic members 15, 16, and 19 (the temperature of the cutting projections) may be determined as long as the elastic members 15, 16, and 19 can be reliably cut, but the production line is fast. In order to reliably cut the elastic members 15, 16, and 19 and prevent the cut portions of the elastic members 15, 16, and 19 from adhering to the surrounding members, the temperature is lower than the melting point of the elastic members 15, 16, and 19. However, it is preferable that the temperature is sufficiently high. When cutting the elastic members 15, 16, and 19 at such a high temperature, if the melting points of the outer sheet layer 12S and the inner sheet layer 12H are lower than the cutting temperature, the inner sheet layer 12H has the elastic members 15, 16, and 19 Although there is a possibility that a melting mark remains or a hole is opened at the cut site, the heat insulating effect of the display sheet 25 reduces the influence on the outer sheet layer 12S. Generally, the melting point of the nonwoven fabric used for the outer sheet layer 12S and the inner sheet layer 12H is about 160 to 175 ° C, the melting point of the elastic members 15, 16, and 19 is about 200 to 230 ° C, and the heating temperature is 180 to It can be 200 degreeC.

(Position for inserting absorbent material)
Characteristically, as shown in FIG.1 and FIG.5, the pocket 20 for the absorber insertion which has the insertion port 21 in the waist opening WO side is provided inside the elastic members 15-17 in the rear side exterior body 12B. In addition, a large number of holes 22 penetrating into and out of the pocket 20 are formed in the wall portion on the skin side of the pocket 20 at intervals. As shown in FIGS. 9 and 12, the user inserts an appropriate disposable absorbent material 28 such as tissue paper, toilet paper, water-absorbing non-woven fabric, etc., rolled or folded into the pocket 20 as necessary. As a result, the gap between the diaper causing back leakage and the back of the wearer can be filled. In addition to filling the gap, a large number of holes 22 are formed at the site, so that the absorbent material 28 in the pocket 20 can absorb and hold liquid components via the holes 22 in an auxiliary manner. , Back leakage can be prevented more effectively.

  The number of pockets 20 is not particularly limited, and one or a plurality of pockets 20 can be provided. For example, as shown in FIGS. 11 and 13, it is preferable that a plurality of vertically long pockets 20 are provided in the width direction because the user can freely select the pockets 20 into which the absorbent material 28 is inserted. Moreover, since the gap filling action by each pocket 20 functions independently, the fit to the unevenness of the wearer's back is improved, which is preferable.

  The pocket 20 can be provided at an arbitrary position in the width direction of the rear exterior body 12B. However, as shown in FIGS. It is preferable to provide within the width direction range. Further, when the number of pockets 20 is an odd number, it is desirable to provide it at the center in the width direction as shown in FIG.

  The size of the pocket 20 (inside air) is not particularly limited, but when a rolled or folded tissue paper is inserted, the length 20x in the width direction WD is preferably about 40 to 50 mm. The length 20y in the front-rear direction LD of the pocket 20 (inside sky) is preferably about 30 to 50% of the front-rear direction LD interval 200d between the rear end of the absorber 56 and the edge of the waist opening WO. In particular, the end portion on the crotch side of the pocket 20 may overlap the rear end portion of the absorbent body 56, but it is desirable that the end portion of the pocket 20 is located on the same side as the rear end portion of the absorbent body 56 or on the waist opening WO side. The end portion on the crotch side of the pocket 20 may or may not overlap the rear end portion of the interior body 200.

  The formation region of the hole 22 in the pocket 20 is not particularly limited, and the hole 22 can be formed over the entire front-rear direction. However, when the holes 22 are arranged close to each other, the pocket 20 is easily broken, and thus as shown in the figure. In addition, it is desirable not to provide the hole 22 at least at the end of the waist opening WO.

  The planar shape (opening shape) of each hole 22 provided in the pocket 20 can be determined as appropriate. In addition to the long hole shape shown in FIGS. 16 (a) and 16 (b), FIG. ), An elliptical shape as shown in FIG. 16D, a polygon such as a triangle, a rectangle, and a rhombus, a star shape, and a cloud shape. Although the size of each hole 22 is not particularly limited, the maximum dimension 22L in the front-rear direction LD is preferably 0.5 to 5 mm, and the maximum dimension 22W in the width direction WD is preferably 0.5 to 5 mm. When the shape of the hole 22 is a long shape in one direction such as a long hole shape, an oval shape, a rectangle shape, a rhombus shape, etc., the longitudinal direction of the hole 22 is preferably the front-rear direction LD, but the width direction WD or the oblique direction It may be.

Although individual area and the area ratio of the holes 22 may be appropriately determined, it is preferable that an area of ² about 0.25～25Mm, (the total area of the pores occupied in the porous region) area ratio 10-30% It is preferable that it is a grade.

  Although the plane arrangement of the holes 22 can be determined as appropriate, a plane arrangement that is regularly repeated is preferable, and is an orthorhombic lattice shape as shown in FIG. 16A or a hexagonal lattice shape as shown in FIG. (These are also referred to as a staggered pattern.), A square grid pattern as shown in FIG. 16 (c), a rectangular grid pattern as shown in FIG. 16 (d), and a parallel grid as shown in FIG. And so on, in which two groups of parallel diagonal rows intersect each other), etc. (including those inclined at an angle of less than 90 degrees with respect to the expansion / contraction direction ED) In addition to what is regularly repeated, the group of holes 22 (the group unit arrangement may be regular or irregular, and may be a pattern, a character, or the like) may be regularly repeated.

  The front-rear direction interval 22y and the width-direction interval 22x of the holes 22 can be determined as appropriate, but in a normal case, it is preferably about 1 to 20 mm.

  Even if the hole 22 is a punched hole 22 whose edge is formed by a cut end of the fiber, the edge of the hole 22 has almost no cut end of the fiber, and a pin is inserted between the fibers to be expanded. The formed non-punched holes 22 (the edge fiber density is high) may be used. Moreover, although it is desirable that the fibers at the edge of the hole 22 are fused, the fibers may not be fused.

  As for the pocket 20, a dedicated sheet may be separately attached to the rear exterior body 12B. However, when the pocket 20 is formed by using a sheet material for forming the exterior bodies 12 and 12B as illustrated, as will be described later. It can manufacture without increasing a manufacturing process. In addition, water-repellent or hydrophobic non-woven fabric is widely used as the material of the exterior bodies 12 and 12B. However, in the present invention, since the pocket 20 has a large number of holes 22, the absorption function of the pocket 20 is hindered. There is nothing. More specifically, as shown in the figure, the non-woven fabric forming the outer sheet layer 12S is folded back inside the inner sheet layer 12H and the outer sheet layer 12S at the edge of the waist opening WO, and the folded portion 12R. Has a back side portion 23 that extends from the waist opening WO to the crotch side, and a front side portion 24 that is folded back at the crotch side and extends to the waist opening WO side, and joins the front side portion 24 and the back side portion 23. It is one preferable embodiment that at least a pair of the portions 26 are provided at intervals in the width direction WD, and the non-joined portion between the side joint portions 26 is the pocket 20. In the cross-sectional view, a hot melt adhesive for forming the side joint portion 26 is indicated by reference numeral H1. As shown in FIG. 10, the side joints 26 may be provided only in the vicinity of both sides of the pocket 20. Although not shown, instead of the nonwoven fabric forming the outer sheet layer 12S, the nonwoven fabric forming the inner sheet layer 12H is folded back inside the inner sheet layer 12H and the outer sheet layer 12S at the edge of the waist opening WO. You may form the pocket 20 by a part.

  As shown in FIG. 14, the nonwoven fabric forming both the inner sheet layer 12H and the outer sheet layer 12S is folded back inside the inner sheet layer 12H and the outer sheet layer 12S at the edge of the waist opening WO, and this folding is performed. The portion 12R has a back side portion 23 extending from the waist opening WO toward the crotch side, and a front side portion 24 that is folded back at the crotch side and extends toward the waist opening WO, and a portion located on the front side of the pocket 20 in the front side portion 24 It is also a preferred form that a pocket elastic member 27 that elastically expands and contracts in the width direction WD is provided between the non-woven fabrics. Thereby, since the front side part 24 which is the skin side wall part of the pocket 20 is elastically pressed against the back side part 23, the absorbent 28 inserted into the pocket 20 is firmly held in the pocket 20. become. In the illustrated embodiment, the elongated pocket elastic member 27 is provided over the entire width direction WD of the rear exterior body 12B, and the entire width direction including the portion other than the pocket 20 is expanded and contracted. Other than the above, the pocket elastic member 27 may not be provided, or the non-stretchable region may be formed by fine cutting. Moreover, although not shown in figure, the same effect can be acquired even if it employ | adopts the elastic nonwoven fabric which elastically stretches itself as a nonwoven fabric which forms the front side part 24. FIG.

  As shown in FIG. 11, a plurality of vertically long pockets 20 are provided at intervals in the width direction WD, and in a portion between adjacent pockets 20, a back side portion 23 is formed as shown in FIG. A form that is not bonded to the outer member (in the illustrated form, the surface of the interior body 200 and the inner sheet layer 12H of the exterior body 12) is also a preferred form.

  In this embodiment, as shown in FIG. 13, the back side portion 23 of the portion 20 </ b> D located between the adjacent pockets 20 is inserted by inserting the absorbent material 28 for filling the gaps in both the adjacent pockets 20. A gap 29 (see FIG. 11C) is formed which floats from the outer member (in the illustrated form, the surface of the interior body 200 and the inner sheet layer 12H of the exterior body 12) and opens to the crotch side. Therefore, at the site of the pocket 20, the gap between the pockets 20 is filled with the absorbent material 28 to prevent excrement from leaking, and between the adjacent pockets 20, the crotch side is opened (indicated by a two-dot chain line in FIG. 13). Leakage can be prevented by introducing excrement into the gap 29 (shown) and blocking it. In particular, it is one desirable form that the depressions on both sides of the lumbar vertebra are filled with the absorbent material 28 inserted into the pocket 20 and the lumbar portion is damped by the gap 29 between the back side portion 23 between the pockets 20 and the inner sheet layer 12H. It is.

  Further, as in the form shown in FIG. 10, a part of the back side portion 23 located on the back side of the pocket 20 is on an outer member thereof (in the illustrated form, the surface of the interior body 200 and the inner sheet layer 12H of the exterior body 12). As shown in FIG. 9 and the like, the portion located on the back side of the pocket 20 in the back side portion 23 is an outer member thereof (in the illustrated form, the surface of the interior body 200 and the inside of the exterior body 12). It is also possible to adopt a form that is not bonded to the sheet layer 12H). In the latter case, as shown in FIG. 9 and the like, if a large number of holes 22 penetrating the inside and outside of the pocket 20 are formed at intervals in the back side portion 23, only from the skin side (front side) of the pocket 20 It is preferable because it can be absorbed into the pocket 20 from the back side. In the cross-sectional view, a hot melt adhesive for joining the back side portion 23 to the outer member thereof is indicated by reference numeral H2.

  On the other hand, as described above, when the pocket 20 is formed using the sheet material forming the rear exterior body 12B, as shown in FIG. 15, the seal roll 70 for cutting the elastic member is formed with holes. Perforated projections 74 are provided, and at the same time as the cutting of the elastic members 15, 16, 19, the holes 22 are provided at predetermined positions of the sheet material forming the rear exterior body 12 </ b> B, and then the portion having the holes 22 is folded. By forming the aforementioned side joint portion 26, the aforementioned pocket 20 can be formed without adding a new process.

<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: 0.03 wt%, magnesium sulfate heptahydrate: 0.08 wt%, ion-exchanged water: 97.09 wt%) 49 Add 1.0 g of superabsorbent polymer to 0.0 g and stir 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, B ... back body, F ... front body, L ... middle region, LD ... front-rear direction, LO ... leg opening, T ... waistline region, U ... waist lower part, W ... Waist part, WD ... Width direction, WO ... Waist opening, 11 ... Liquid impervious sheet, 12 ... Exterior body, 12A ... Side seal part, 12B ... Rear exterior body, 12F ... Front side exterior body, 12H ... Inner sheet Layer, 12 m ... cutting trace, 12S ... outer sheet layer, 14 ... buttock cover part, 18 ... unnecessary elastic member, 20 ... pocket, 21 ... insertion port, 22 ... hole, 23 ... back side part, 24 ... front side part, 25 ... Display sheet, 26 ... side joint, 27 ... pocket elastic member, 28 ... absorbent, 29 ... gap, 30 ... top sheet, 40 ... intermediate sheet, 50 ... absorbent element, 56 ... absorbent, 58 ... packaging sheet, 60 ... Solid gathers, 62 ... Gi Zashito, 200 ... the inner body, 201 ... inside and outside the fixed portion.

Claims (6)

An integral exterior body from the front body to the back body, or an exterior body provided separately for the front body and the back body;
An interior body including an absorbent body extending in the front-rear direction from the front body to the back body and joined to the exterior body;
Side seal portions in which both side portions of the exterior body in the front body and both side portions of the exterior body in the back body are joined,
In a pants-type disposable diaper with a waist opening and a pair of left and right leg openings,
An elastic member that elastically expands and contracts in the width direction is provided on the outer body of the back body in the waist area corresponding to the side seal portion and the front-rear direction range,
Inside the outer body of the outer body of the back body, a pocket for inserting an absorbent material having an insertion port on the waist opening side is provided, and on the skin side wall portion of the pocket, inside and outside of the pocket A number of through holes are formed at intervals,
A pants-type disposable diaper characterized by that. The outer body of the back body has an inner sheet layer made of a water-repellent or hydrophobic nonwoven fabric, and an outer sheet layer made of a water-repellent or hydrophobic nonwoven fabric, and the inner sheet layer and the outer sheet layer between the inner sheet layer and the outer sheet layer. The elastic member is sandwiched,
The nonwoven fabric forming at least one of the inner sheet layer and the outer sheet layer is folded inward from the inner sheet layer and the outer sheet layer at the edge of the waist opening, and the folded portion is crotch side from the waist opening. And a front side portion that is folded back on the crotch side and extends to the waist opening side,
At least a pair of joint portions that join the front side portion and the back side portion are provided at intervals in the width direction, and the non-joint portions between these joint portions are the pockets,
The pants-type disposable diaper according to claim 1. The non-woven fabric forming both the inner sheet layer and the outer sheet layer is folded back to the inner side of the inner sheet layer and the outer sheet layer at the edge of the waist opening, and the folded portion is located on the crotch side from the waist opening. While having a back side portion that extends and a front side portion that is folded back on the crotch side and extends to the waist opening side,
Between the nonwoven fabric of the portion located on the front side of the pocket in the front side portion, an elastic member that elastically expands and contracts in the width direction is provided.
The pants-type disposable diaper according to claim 2. As the pocket, a plurality of vertically long pockets are provided at intervals in the width direction, and in the portion located between adjacent pockets, the back side portion is not joined to the member located outside the pocket,
A pants-type disposable diaper according to claim 2 or 3. The portion located on the back side of the pocket in the back side portion is not joined to the member located on the outside thereof, and a large number of holes penetrating the inside and outside of the pocket are formed in the back side portion with a space therebetween. ing,
The underpants type disposable diaper of any one of Claims 2-4. As the pocket, a plurality of vertically elongated pockets are provided in the width direction within the width direction range having the interior body,
The underpants type disposable diaper of any one of Claims 1-5.

Images