JP2012200577A5 - - Google Patents

Description

Disposable diapers

  The present invention relates to a disposable diaper in which a user can adjust a tightening pressure around a leg or a waist.

  In disposable diapers, in order to improve the fit to the root of the leg, it is common that solid gathers projecting toward the body side extend in the front-rear direction on both sides in the width direction on the inner surface of the diaper. (For example, refer to Patent Document 1). By providing such a three-dimensional gather, excrement remains between the compatible body gathers, and in particular, leakage of excrement from the wearer's leg periphery is prevented.

  FIG.12 and FIG.13 shows the prior art example of the disposable diaper provided with the solid gathers. The three-dimensional gather 60 of the disposable diaper has a root portion fixed to the inner surface of the diaper and a protruding portion protruding from the root portion, and both end portions in the front-rear direction of the protruding portion are bonded to the surface of the top sheet 30. In addition to being fixed, the intermediate portion is an unfixed free portion, and the elastic elastic member 63 is fixed in an elongated state along the front-rear direction at least at the distal end of the free portion. The free part stands up from the surface of the top sheet 30 due to the contraction action of. 8 and 9, the hatched portion (dotted pattern portion) indicates an adhesive fixing portion. Reference numeral 50 indicates an absorbent element, reference numeral 56 indicates an absorber, reference numeral 11 indicates a liquid-impermeable sheet, and reference numeral 12 indicates. Indicates an outer sheet, reference numeral 40 indicates an intermediate sheet, reference numeral 13 indicates a fastening tape, and reference numeral 12T indicates a target tape.

  Further, in order to further prevent leakage around the legs, the side flap portions SF extending on both sides in the width direction of the absorbent body 56 extend to the side of the boundary between the root portion and the protruding portion of the three-dimensional gather 60. The elongated elastic elastic member 64 that extends in the front-rear direction is fixed to the leg-peripheral part in a stretched state, so that the leg-peripheral part of the side flap portion SF is surface-fitted to the wearer's leg-periphery. It is also common to use a leg gathering around the leg (referred to as a “planar” in the sense of a three-dimensional gather, but it is not a plane but a curved surface around the leg when worn).

  Furthermore, in order to make the waistline elastically fit, an elastic elastic member is fixed to the waistline part in a state where it is stretched in the waistline direction. Forming a curved surface along the waistline). In the illustrated example, a waistline flat gather is formed by providing a back-side elastic sheet that elastically expands and contracts across the fastening tape in the back-side portion B.

JP-A-2005-319142 JP 2004-298401 A JP 2001-087312 A

However, the tightening pressure of the flat gathers of conventional disposable diapers is set assuming a standard body shape and cannot be adjusted. Therefore, depending on the wearer, the tightening pressure may be too strong and the wearing feeling may deteriorate. There was a risk of causing problems such as tingling and skin irritation, and leakage from the legs and waistline due to the tightening pressure being too weak.
Then, the main subject of this invention is providing the disposable diaper which can adjust the clamping pressure of a plane gather.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
The liquid-permeable top sheet that forms the body-side surface, the liquid-impermeable sheet located on the back side thereof, and the liquid-permeable top sheet and the liquid-impermeable sheet are disposed along the center in the width direction. An absorbent body extending from the lower abdomen through the crotch to the buttocks,
Side flap portions extending on both sides in the width direction of the absorber,
In a disposable diaper provided with a leg elastic elastic member fixed in a stretched state in the front-rear direction on the leg part of the side flap part,
As the elastic elastic member around the leg, provided with an elastic elastic member around the first leg provided detachably, and an elastic elastic member around the second leg left without being removed,
A disposable diaper characterized by that.

(Function and effect)
In this invention, a user can adjust in the direction which loosens the clamping pressure of a plane gather by removing the elastic elastic member around the 1st leg from a diaper as needed. That is, when the tightening pressure is too strong, the tightening pressure can be weakened by removing the elastic elastic member around the first leg, and the tightening pressure can be weakened only by the elastic elastic member around the second leg.

<Invention of Claim 2>
Three-dimensional gathers projecting to the body side extend along the front-rear direction on both sides in the width direction on the inner surface of the diaper,
The three-dimensional gather has a root portion fixed to the inner surface of the diaper and a protruding portion protruding from the root portion, and is fixed in a state where both front and rear end portions of the protruding portion are folded flat, and the intermediate portion is not fixed. A solid gather sheet that is a fixed free part, and an elongated elastic elastic member that is fixed in an elongated state along the front-rear direction at least at the tip of the free part. The free part is configured to stand by the contracting action of the member,
Comprising an exterior sheet covering the back surface of the liquid-impermeable sheet;
The side flap portion is formed by a base portion of the three-dimensional gather sheet and a side portion of the exterior sheet,
Between the three-dimensional gather sheet and the exterior sheet in the side flap portion, the elastic elastic member around the second leg is sandwiched,
On the surface of the three-dimensional gather sheet in the side flap part or on the back surface of the exterior sheet, a press sheet in which the elastic elastic member around the first leg is fixed is detachably attached,
By separating the presser sheet from the side flap portion, the elastic elastic member around the first leg is removed and the elastic elastic member around the second leg remains between the three-dimensional gather sheet and the exterior sheet. The disposable diaper of Claim 1 comprised as follows.

(Function and effect)
By attaching the elastic elastic members around the first and second legs with such a structure, only the elastic elastic members around the first leg can be removed with a simple structure, and the manufacture is facilitated.

<Invention of Claim 3>
A portion on the center side in the width direction of the presser sheet extends to the free portion of the three-dimensional gather sheet and is detachably integrated with the three-dimensional gather sheet, and a second three-dimensional elastic elastic member is attached to the extended portion. The disposable according to claim 2, wherein the disposable part is fixed in an extended state in the front-rear direction, and is configured such that the extension part having the elastic member for second solid is separated along with the separation of the presser sheet. Diapers.

(Function and effect)
This configuration is preferable because not only the flat gather clamping pressure but also the three-dimensional gather fastening pressure can be adjusted simultaneously in conjunction with each other.

<Invention of Claim 4>
The disposable diaper according to claim 2 or 3, wherein a design is imparted to the presser sheet, and the design can be eliminated from the diaper by separating the presser sheet.

(Function and effect)
By giving a design to the presser sheet, it is possible to visually grasp changes before and after the presser sheet is separated, thereby improving workability. Moreover, such a design change also brings about the effect | action which makes a wearer or a user perceive a child's growth and product performance.

<Invention of Claim 5>
The elastic elastic member around the first leg is provided inside the side flap portion, and a takeout port for picking out the elastic elastic member around the first leg is formed in the side flap portion. Disposable diapers.

(Function and effect)
Unlike the above example, it is also possible to form such a takeout port and take out a part of the elastic elastic member around the leg. In this case, there is an advantage that the structure becomes simpler and the manufacture becomes easier.

<Invention of Claim 6>
The elastic elastic member around the first leg is not provided in the crotch portion of the side flap portion, but is provided only on the front and back sides of the crotch portion, and the elastic elastic member around the second leg is on the front side of the crotch portion. The disposable diaper of any one of Claims 1-5 provided continuously from the back side.

(Function and effect)
As described above, if the attachment positions of the removable elastic members around the first leg are limited to the front and rear sides of the crotch part, the tightening pressure of the flat gather at the crotch part is suppressed while the elastic elastic members around the first leg are attached. The increase in the tightening pressure before and after that causes the crotch portion to have a strong action of lifting, and particularly, the three-dimensional gather fits well to the inguinal portion. On the other hand, in the state where the elastic member around the first leg is removed, the tightening pressures of the planar gather and the three-dimensional gather are made uniform in the front-rear direction, which is close to the conventional general-purpose structure. In the invention, the user can arbitrarily select these states.

<Invention of Claim 7>
The liquid-permeable top sheet that forms the body-side surface, the liquid-impermeable sheet located on the back side thereof, and the liquid-permeable top sheet and the liquid-impermeable sheet are disposed along the center in the width direction. An absorbent body extending from the lower abdomen through the crotch to the buttocks,
End flaps extending on both the front and rear sides of the absorber;
In a disposable diaper provided with a waist elastic elastic member fixed to the end flap part in a state of extending in the width rear direction,
As the waist elastic stretch member, provided with a first waist elastic stretch member detachably provided, and a second waist elastic stretch member left without being removed,
A disposable diaper characterized by that.

(Function and effect)
In this invention, a user can adjust in the direction which loosens the clamping pressure of a plane gather by removing a 1st waist elastic elastic member from a diaper as needed. That is, when the tightening pressure is too strong, the tightening pressure can be reduced by removing the elastic elastic member around the first body, and the tightening pressure can be reduced only by the elastic member around the second body.
In addition, the form which has this 1st and 2nd waist periphery elastic elastic member can also be combined with the form which has the above-mentioned 1st and 2nd leg elastic elastic member.

  As described above, according to the present invention, there are advantages such as the tightening pressure of the planar gathers being adjustable.

It is a top view in the state where the diaper was developed showing the inner surface of a tape type disposable diaper. It is a top view in the state where the diaper was developed showing the outer surface of a tape type disposable diaper. FIG. 6 is a sectional view taken along line 6-6 of FIG. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 1. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 1. FIG. 9 is a sectional view taken along line 9-9 in FIG. 1. It is a top view in the state where the diaper was developed showing the inner surface of a tape type disposable diaper. It is a top view in the state where the diaper was developed showing the outer surface of a tape type disposable diaper. It is a top view in the state where the diaper was developed showing the inner surface of a tape type disposable diaper. It is a top view in the state where the diaper was developed showing the outer surface of a tape type disposable diaper. FIG. 6 is a sectional view taken along line 6-6 of FIG. It is a top view in the state where the diaper was developed showing the inner surface of a tape type disposable diaper. FIG. 6 is a sectional view taken along line 6-6 of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Note that “front-rear direction (vertical direction)” means a direction connecting the ventral side (front side) and back side (rear side), and “width direction” means a direction (left-right direction) orthogonal to the front-rear direction. The “vertical direction” means a wearing state of the diaper, that is, a direction orthogonal to the width direction when the diaper is folded in two at the crotch portion so that the abdomen portion and the back portion of the diaper are overlapped. Further, the term “elongation rate” means a value when the natural length is 100%.

  1-6 has shown an example of the tape type disposable diaper. 3 and 4 are views showing a cross section taken along line 6-6 and 7-7 in FIG. 1, respectively, and FIGS. 5 and 6 are cross sections taken along line 8-8 and 9-9 in FIG. FIG. The code | symbol X in the figure has shown the full width of the diaper except a fastening tape, and the code | symbol L has shown the full length of the diaper.

  This tape-type disposable diaper is a part that extends from the lower abdomen through the crotch part to cover the buttocks along the center in the width direction, and a liquid-permeable surface sheet that forms the body-side surface, and the outer surface side The absorbent main body 10 is a part where the absorbent body 56 is interposed between the liquid-impermeable sheet and the liquid-impermeable sheet, and the front part and the rear side of the absorbent main body part 10 respectively extend. And end flap portions EF, EF that are portions that do not have the absorber 56, and side flaps that are portions that extend to the left and right sides of the absorbent main body 10 and that do not have the absorber 56, respectively. Parts SF and SF.

  More specifically, the entire outer surface of the absorbent main body 10 and each of the side flap portions SF on the back side and the abdomen side is formed by the exterior sheet 12. In particular, in the absorbent main body 10, a liquid-impermeable sheet 11 is fixed to the inner surface side of the exterior sheet 12 with an adhesive such as a hot-melt adhesive, and an absorbent element is further disposed on the inner surface side of the liquid-impermeable sheet 11. 50, the intermediate sheet 40, and the top sheet 30 are laminated in this order. The top sheet 30 and the liquid-impermeable sheet 11 are rectangular in the illustrated example, have a slightly larger dimension in the front-rear direction and the width direction than the absorbent element 50, and are eaten from the side edges of the absorbent element 50 in the top sheet 30. The peripheral edge that protrudes and the peripheral edge that protrudes from the side edge of the absorbent element 50 in the liquid-impermeable sheet 11 are fixed by a hot melt adhesive or the like. The liquid-impermeable sheet 11 is made of a moisture-permeable polyethylene film or the like, and is formed to be slightly wider than the top sheet 30.

  Furthermore, solid gathers 60 and 60 are provided on both sides of the absorbent main body 10 so as to protrude (stand up) toward the wearer's skin, and the solid gather sheets 62 and 62 forming the solid gathers 60 and 60 are provided. However, it extends over the whole width direction outer side of the absorptive main-body part 10 including the inner surface of each side flap part SF and SF.

Hereinafter, the material and the characteristic part of each part are demonstrated in order.
(Exterior sheet)
The exterior sheet 12 is a part that supports the absorbent element 50 and is attached to the wearer. The exterior sheet 12 has an hourglass shape in which the center part in the front-rear direction on both sides is constricted, and this is a part into which the wearer's leg is placed.
The exterior sheet 12 is preferably a non-woven fabric, but is not limited thereto. The type of the nonwoven fabric is not particularly limited, and as the material fiber, for example, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester or polyamide, recycled fibers such as rayon or cupra, and natural fibers such as cotton are used. As a processing method, a spunlace method, a spunbond method, a thermal bond method, an air-through method, a needle punch method, or the like can be used. However, a long-fiber nonwoven fabric such as a spunbond nonwoven fabric, an SMS nonwoven fabric, or an SMMS nonwoven fabric is preferable in that both the touch and strength can be achieved. In addition to using a single nonwoven fabric, a plurality of nonwoven fabrics can be used. In the latter case, the nonwoven fabrics 12 are preferably bonded to each other with a hot melt adhesive or the like. When using a nonwoven fabric, the fabric weight is preferably 10 to 50 g / m ² , particularly 15 to 30 g / m ² .

(Liquid impervious sheet)
The material of the liquid-impermeable sheet 11 is not particularly limited. For example, the liquid-impermeable sheet 11 is substantially made of an olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet, or a waterproof film. Non-woven fabrics that ensure liquid impermeability (in this case, liquid impervious sheets are composed of waterproof films and non-woven fabrics). Of course, in addition to this, a liquid-impermeable and moisture-permeable material that has been used and used in recent years from the viewpoint of preventing stuffiness can also be exemplified. As the sheet of the material having liquid impermeability and moisture permeability, for example, an inorganic filler is kneaded in an olefin resin such as polyethylene or polypropylene, and the sheet is formed, and then stretched in a uniaxial or biaxial direction. Examples of the microporous sheet obtained in this way can be given. In addition, non-woven fabric using micro-denier fiber, strengthening leak-proofing by reducing the voids of the fiber by applying heat or pressure, and applying water-absorbing resin or hydrophobic resin or water repellent. A sheet that is liquid-impermeable without using a film can also be used as the liquid-impermeable sheet 11.

(Surface sheet)
The top sheet 30 is sufficient if it has liquid permeability, and for example, a porous or non-porous nonwoven fabric or a porous plastic sheet can be used. 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, the spun lace method is a preferable processing method for obtaining flexibility and drapeability, and the thermal bond method is for obtaining bulkiness and softness.
Further, the top sheet 30 may be composed of one sheet or may be composed of a laminated sheet obtained by bonding two or more sheets. Similarly, the top sheet 30 may be composed of one sheet or two or more sheets in the planar direction.

(Intermediate sheet)
An intermediate sheet (also referred to as a second sheet) 40 can be provided between the surface sheet 30 and the absorbent element 50 in order to move excrement that has passed through the surface sheet 30 to the absorber and prevent reversal. The intermediate sheet 40, excrement was allowed to migrate rapidly to the absorbent body not only enhance absorption performance by the absorber, preventing the back from the absorbent body exudates absorbed, better feel topsheet 30 surface To do. The intermediate sheet 40 can be omitted.
As the intermediate sheet 40, the same material as that of the top sheet 30 can be used. The intermediate sheet 40 is preferably bonded to the top sheet 30. When heat embossing or ultrasonic welding is used for the bonding, the material of the intermediate sheet 40 preferably has a melting point similar to that of the top sheet 30. Further, considering the permeation of the solid content in the stool, the fineness of the fiber used for the intermediate sheet 40 is preferably 5.0 to 7.0 dtex, but the liquid residue in the top sheet 30 increases. On the other hand, when the fineness of the fiber used for the intermediate sheet 40 is 1.0 to 2.0 dtex, the liquid residue of the top sheet 30 is hardly generated, but the solid content of the stool is hardly transmitted. Therefore, it is preferable that the fiber of the nonwoven fabric used for the intermediate sheet 40 has a fineness of about 2.0 to 5.0 dtex.
The intermediate sheet 40 in the illustrated form is arranged in the center shorter than the width of the absorbent element 50, but may be provided over the entire width. The length in the longitudinal direction of the intermediate sheet 40 may be the same as the entire length of the diaper, may be the same as the length of the absorbent element 50, or may be within a short length range centered on the region that receives the liquid.

(Three-dimensional gather)
In order to prevent urine and soft stool that move laterally on the top sheet 30 and prevent side leakage, three-dimensional gathers 60, 60 that protrude (stand up) on the use surface side are provided on both sides of the product. Yes.
The three-dimensional gather 60 includes a three-dimensional gather sheet 62 that is substantially continuous in the width direction, and an elongated elastic elastic member 63 that is fixed to the three-dimensional gather sheet 62 in a stretched state along the front-rear direction. As the three-dimensional gather sheet 62, a water-repellent nonwoven fabric can be used, and as the elastic elastic member 63, thread rubber or the like can be used. In addition to providing a plurality of elastic elastic members 63, one elastic member can be provided.
The inner surface of the three-dimensional gather sheet 62 has a fixing start end in the width direction on the side portion of the top sheet 30, and the outer portion in the width direction from the fixing start end is the side portion of the liquid-impermeable sheet 11 and the outer side in the width direction. Is fixed to a side portion of the exterior sheet 12 located at a position by a hot melt adhesive or the like.
Around the legs, the width direction inner side of the solid gather 60 is fixed on the top sheet 30 at both ends in the front-rear direction of the product, but the portion between them is an unfixed free part. It comes to stand by the contraction force of the thread rubber 63. When the diaper is mounted, the diaper is mounted on the body in the shape of a boat, and the contraction force of the rubber thread 63 acts, so that the three-dimensional gather 60 stands up and adheres to the legs around the contraction force of the rubber thread 63. As a result, so-called side leakage from around the legs is prevented.
Unlike the illustrated embodiment, both the front and rear direction end portions of the three-dimensional gather sheet 62 in the width direction inner side are a base end side portion extending inward in the width direction from the width direction outer side portion and the width direction center side of the base end side portion. It is also possible to fix it in a double-folded state having a tip side portion that is folded back from the edge of the body toward the body side and extends outward in the width direction, and the portion in between can be an unfixed free portion.

(Plane gathering)
In the side flap portion SF, the first and second leg elastic elastic members 84 and 64 made of rubber thread and the like extend in the front-rear direction along the front-rear direction on the outer side in the width direction near the fixation start end of the three-dimensional gather 60. A flat gather is formed by being fixed in a state. Characteristically, as shown in FIGS. 1 to 4, the first leg elastic elastic member 84 is detachably provided, and the second leg elastic elastic member 64 is provided. Is configured to remain without being removed. More specifically, a second leg elastic elastic member 64 is sandwiched between the three-dimensional gather sheet 62 and the exterior sheet 12 in the side flap portion SF, and is fixed by a hot melt adhesive, and in the side flap portion SF. On the surface of the three-dimensional gather sheet 62 (may be on the back surface of the exterior sheet 12 as in the examples shown in FIGS. 10 and 11), a strip-shaped presser sheet 80 is detachably attached by a hot melt adhesive 85, A first leg elastic elastic member 84 is sandwiched between the presser sheet 80 and a counter sheet (three-dimensional gather sheet 62 in the illustrated example), and is fixed with a hot melt adhesive.

The presser sheet 80 can be appropriately selected from the same materials as the exterior sheet 12 and the three-dimensional gathered sheet 62 and used. As the elastic members 84 and 64 around the first and second legs, an elongated synthetic or natural rubber such as a thread, string or belt can be used, and the thickness is about 400 to 1100 dtex (in the case of synthetic rubber. Natural rubber). In the case of a cross-sectional area of about 0.1 to 3.0 mm ² ), with an interval of about 1 to 10 mm, about 4 to 20 in total for the first and second, respectively, with an elongation of about 150 to 300%, respectively. It is desirable to fix.

  Then, as shown in FIGS. 7 and 8, the user separates the presser sheet 80 from the side flap portion SF as needed, and removes the elastic elastic member 84 around the first leg, thereby elastically expanding and contracting around the second leg. The member 64 can be left between the three-dimensional gather sheet 62 and the exterior sheet 12, and can be adjusted in the direction of loosening the tightening pressure of the planar gather. That is, when the tightening pressure is too strong, the tightening pressure can be reduced by removing the elastic elastic member 84 around the first leg, and the tightening pressure can be reduced only by the elastic elastic member 64 around the second leg. it can. Further, by attaching the elastic elastic members 84 and 64 around the first and second legs with the structure shown in the figure, only the elastic elastic member 84 around the first leg can be removed with a simple structure, and the manufacture is also easy. It becomes.

  When the presser sheet 80 is separated from the side flap portion SF, the first leg elastic elastic member 84 has an adhesive force to the presser sheet 80 so that the first leg elastic elastic member 84 is attached to the presser sheet 80 and removed. It is a preferable form that it is configured to be stronger than the adhesive force to the three-dimensional gather sheet 62. The magnitude relationship of the adhesive force can be formed by making the type and application amount of the adhesive different between the pressing sheet 80 side and the three-dimensional gather sheet 62 side of the elastic elastic member 84 around the first leg. Alternatively, the presser sheet 80 may have a double laminated structure, and the elastic elastic member 84 around the first leg may be sandwiched and fixed between the layers, and the outer surface may be fixed to the opposing sheet so as to be peelable.

  As shown in the figure, the widthwise center portion 81 of the presser sheet 80 extends to the free portion of the three-dimensional gather sheet 62 and is integrated with the three-dimensional gather sheet 62 so as to be peelable by the hot melt adhesive 85, The second three-dimensional elastic elastic member 83 is fixed to the extending part 81 in a state of extending in the front-rear direction, and the extension part 81 having the second three-dimensional elastic elastic member 83 is accompanied with the separation of the presser sheet 80. Are also preferably separated, because not only the tightening pressure of the planar gathers but also the tightening pressure of the three-dimensional gathers can be adjusted simultaneously in conjunction with each other. As in the case of the elastic leg member 84 around the first leg, when the presser sheet 80 is separated from the three-dimensional gather sheet 62, the second three-dimensional elastic extensible member 83 is attached to the presser sheet 80 and removed. It is a preferable embodiment that the adhesive force of the elastic elastic member 83 for the presser sheet 80 is stronger than the adhesive force for the three-dimensional gather sheet 62. The magnitude relationship of the adhesive force can be formed by making the type and application amount of the adhesive different between the pressing sheet 80 side and the three-dimensional gather sheet 62 side of the second three-dimensional elastic elastic member 83. In the illustrated example, the second elastic elastic member 83 is sandwiched between the extending portion 81 and the three-dimensional gather sheet 62. The elastic elastic member 83 may be sandwiched and fixed, and the outer surface may be fixed to the three-dimensional gather sheet 62 so as to be peelable.

  Furthermore, in the illustrated example, the presser sheets 80 are provided separately on the left and right sides, and there is an advantage that the tightening pressure can be adjusted separately on the left and right sides. The right and left presser sheets 80 can also be configured to be removable at a time by connecting or integrating them at appropriate positions such as standing portions)).

  As described above, when a change in tightening pressure is caused by removing the presser sheet 80, the design 90 is applied to the presser sheet 80, and the design 90 can be eliminated from the diaper by separating the presser sheet 80. Then, since the change before and after separation of the presser sheet can be visually grasped, workability is improved, which is preferable. In addition, such a design change also has an effect of causing the wearer or user to perceive the child's growth and product performance. In particular, if the second design 91 is applied to a part other than the presser sheet 80 (particularly, a part that is covered and concealed by the presser sheet 80. In the illustrated example, the three-dimensional gather sheet 62), the change occurs more than the design 90 simply disappears. It will be easy to understand. For example, in the case of a disposable diaper for infants, the tightening pressure is strong before the presser sheet 80 is removed. Since it becomes weaker, children's animals and characters can be added as a second design.

  Moreover, although the area | region (area | region of a plane gather) which provides the elastic | stretch elastic members 84 and 64 around the 1st and 2nd legs can be determined suitably, the range in the front-back direction is 25 to 80% of the total length L of the diaper in normal cases. The width can be about 0.2 to 30% of the total diaper width X. The longitudinal range in which the first leg elastic member 84 is provided may be the same as the second leg elastic member 64, but may be different. As an example of the latter, as shown in FIG. 9, for example, the first leg elastic elastic member 84 is not provided in the crotch part of the side flap part SF, but is provided only on both front and rear sides of the crotch part, and elastic around the second leg. It is also preferable that the elastic member 64 is continuously provided from the front side to the rear side of the crotch portion. When the attachment positions of the detachable elastic members 84 around the first leg are limited to the front and rear sides of the crotch portion in this manner, the tightening pressure of the planar gathers at the crotch portion is the state where the elastic elastic members 84 around the first leg are attached. While restrained, the crotch part is strongly lifted by the increase of the tightening pressure before and after that, and particularly, the three-dimensional gather 60 fits well to the inguinal part. On the other hand, in the state where the elastic member 84 around the first leg is removed, the tightening pressure of the planar gathers and the three-dimensional gathers 60 is made uniform in the front-rear direction, which is close to a conventional general-purpose structure. And the user can select these states arbitrarily.

  On the other hand, the above example employs a structure in which the first leg elastic elastic member 84 is removed together with the presser sheet 80, but the first leg elastic elastic member 84 is picked up from the presser sheet 80 as shown in FIG. It is also possible to form a take-out port 86 for removing the elastic elastic member 84 around the first leg. In this case, there is an advantage that the structure becomes simpler and the manufacture becomes easier. The shape of the take-out port 86 can be any shape, such as a rectangular shape as shown in the drawing, and can also be a slit as long as it becomes a port for picking out the elastic member 84 around the first leg.

  The illustrated presser sheet 80 is provided on the back surface of the exterior sheet 12 in the side flap portion SF, but may be provided on the surface of the three-dimensional gathered sheet 62 as in the above example. 80 is preferably fixed so that it does not peel when the elastic elastic member 84 around the first leg is picked up. Further, in this embodiment, the presser sheet 80 is not provided, and the first inside the side flap portion SF (between the three-dimensional gather sheet 62 and the exterior sheet 12 as in the second leg elastic stretchable member 64 in the illustrated example). The leg elastic member 84 may be provided, and a sheet for forming the side flap portion SF may be provided with a takeout port for extracting the first leg elastic member 84.

(Absorption element)
The absorption element 50 is a part that absorbs and holds liquid such as urine and loose stool. The absorbent element 50 includes an absorbent body 56 and a packaging sheet 58 that wraps at least the back and side surfaces of the absorbent body 56. The packaging sheet 58 can be omitted. The absorbent element 50 can be adhered to the inner surface of the liquid-impermeable sheet 11 via an adhesive such as a hot melt adhesive on the back surface.

(Absorber)
The absorber 56 can be formed of an aggregate of fibers. As this fiber assembly, a filament assembly obtained by opening as necessary a synthetic fiber tow (fiber bundle) such as cellulose acetate, in addition to those obtained by stacking 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.

(Superabsorbent polymer particles)
The absorbent body 56 preferably includes superabsorbent polymer particles. In particular, at least in the liquid receiving region, the superabsorbent polymer particles (SAP particles) are dispersed substantially throughout the thickness direction with respect to the aggregate of fibers. Is desirable.
If there is no SAP particle in the upper part, the lower part, and the middle part of the absorber 56, or if there is very little, it cannot be said that the "absorbed throughout the thickness direction". Therefore, “distributed in the entire thickness direction” means “distributed unevenly in the upper part, the lower part, and / or the middle part of the aggregate of fibers in addition to the form“ uniformly ”distributed in the entire thickness direction. However, it is still included in the form of being dispersed in the upper, lower and middle portions. Further, a form in which some SAP particles do not enter the fiber assembly and remain on the surface thereof, and a form in which some SAP particles pass through the fiber assembly and are on the packaging sheet 58 are also excluded. It is not something.
Superabsorbent polymer particles include “powder” in addition to “particles”. As the particle diameter of the superabsorbent polymer particles, those used in this type of absorbent article can be used as they are, and those having a particle size of 1000 μm or less, particularly 150 to 400 μm are desirable. The material of the superabsorbent polymer particles can be used without any particular limitation, but those having a water absorption of 40 g / g or more are suitable. High-absorbent polymer particles include starch-based, cellulose-based, and synthetic polymer-based starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and sodium carboxymethylcellulose crosslinks. Or an acrylic acid (salt) polymer can be used. As the shape of the superabsorbent polymer particles, a commonly used granular material is suitable, but other shapes can also be used.
As the superabsorbent polymer particles, those having a water absorption rate of 40 seconds or less are preferably used. When the water absorption speed exceeds 40 seconds, so-called reversion in which the liquid supplied into the absorber 56 returns to the outside of the absorber 56 is likely to occur.
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 , not only the effect is saturated, but also the sensation of incongruity due to the excess of the superabsorbent polymer particles is given.

(Packaging sheet)
When the packaging sheet 58 is used, tissue paper, in particular, crepe paper, nonwoven fabric, polylaminated nonwoven 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 SMMS (spunbond / meltblown / meltblown / spunbond) nonwoven fabric is particularly suitable, and polypropylene, polyethylene / polypropylene, etc. can be used as the material. The fiber basis weight is preferably 5 to 40 g / m ² , particularly 10 to 30 g / m ² .
As shown in FIG. 3, the packaging sheet 58 may wrap only the back surface and the side surface of the layer in addition to the form for wrapping the entire absorbent body 56. Although not shown, only the upper and side surfaces of the absorbent body 56 are covered with crepe paper or a nonwoven fabric, and the lower surface is covered with a liquid-impermeable sheet such as polyethylene, and the upper surface of the absorbent body 56 is covered with crepe paper or a nonwoven fabric. For example, the lower surface may be covered with a liquid-impermeable sheet such as polyethylene (each of these materials is a component of the packaging sheet). If necessary, the absorbent body 56 may be sandwiched between two upper and lower sheets or disposed only on the lower surface, but this is not desirable because it is difficult to prevent the movement of the superabsorbent polymer particles.

(Fastening tape)
As shown in FIGS. 1 and 2, the fastening tape 13 has a base portion of a sheet base material 13C made of a nonwoven fabric, a plastic film, a polylaminated nonwoven fabric, paper or a composite material thereof attached to the diaper and protrudes from the diaper. A hook material 13 </ b> A of a mechanical fastener is provided as a locking portion for the ventral side at the distal end side portion. The hook material 13A is joined to the sheet base 13C with an adhesive so as not to be peeled off.

  In the diaper for infants, among the dimensions of the attachment portion of the fastening tape 13, the width direction length X1 of the diaper is preferably 10 to 50 mm, particularly preferably 20 to 40 mm, and the length Y1 in the front-rear direction is 20 to 100 mm. In particular, the thickness is preferably 40 to 80 mm. Of the dimensions of the front end side portion of the fastening tape 13, the length of the diaper in the width direction is preferably 30 to 80 mm, particularly preferably 40 to 60 mm, and the length (height) in the front-rear direction is 20 to 70 mm. In particular, the thickness is preferably 25 to 50 mm. In addition, when a part or all of the fastening tape 13 has a substantially tapered shape, for example, and the length in the front-rear direction and the length in the width direction are not constant, the numerical range is determined by an average value. The fastening tape 13 may have a symmetrical shape such as a rectangular shape. However, if the fastening tape 13 is a convex shape composed of a wide attachment portion and an elongated tip side portion, the grip portion on the tip side portion can be easily picked and This is preferable because the tension between the bases of this region acts over a wide range. The hook member 13A has a large number of engaging protrusions on the outer surface side. The shape of the engaging protrusion is (A) Le-shaped, (B) J-shaped, (C) Mushroom-shaped, (D) T-shaped, (E) Double J-shaped (J-shaped And the like may be any shape. Instead of the hook material 13 </ b> A, an adhesive material layer can be provided as a locking portion of the fastening tape 13.

  When the diaper is mounted, the fastening tape is locked at a proper position on the outer surface of the abdominal side F with the back side flap portion BF being overlapped on the outside of the abdominal side flap portion FF. The position and size of the fastening portion of the fastening tape 13 can be arbitrarily determined. In diapers for infants, the locking location is a rectangular range of 20 to 80 mm in the front-rear direction and 150 to 300 mm in the width direction, and the distance in the height direction between the upper edge and the ventral upper edge is 0 to 60 mm, particularly 20 to 50 mm. And the center in the width direction of the product.

  When the fastening tape 13 is attached so that the attachment portion of the fastening tape 13 overlaps the boundary line between the back end flap portion BE and the absorbent element 50, the tension acting between the attachment portions of the left and right fastening tapes 13 when the diaper is attached. This is preferable because the back side end of the absorbent element 50 is firmly pressed against the body. Moreover, if the attachment part of the fastening tape 13 is too far from the back side end part (rear end part) of the diaper, the tension acting between the attachment parts of the left and right fastening tapes 13 when the diaper is mounted is the back side end part of the diaper. Therefore, a gap is likely to occur between the back end of the diaper and the body surface. Therefore, the length in the front-rear direction of the back end flap BE is preferably the same as or shorter than the length in the front-rear direction of the base portion of the fastening tape 13.

(Target sheet)
It is preferable to provide a target sheet 12T having a target for facilitating the locking at the locking position of the fastening tape 13 on the ventral side F. As the target sheet 12T, when the hook portion is the hook material 13A, a target sheet 12T can be used in which a large number of loop yarns are formed on the surface of a sheet base material made of a plastic film or nonwoven fabric so that the hook material engagement protrusions are entangled. In the case of an adhesive material layer, a sheet base material made of a plastic film having a smooth surface that is rich in adhesiveness can be used. Further, when the fastening portion of the fastening tape 13 on the ventral side F is made of a nonwoven fabric, for example, when the exterior sheet 12 of the illustrated form is made of a nonwoven fabric and the fastening portion of the fastening tape 13 is a hook material 13A, The target sheet 12T can be omitted, and the hook material 13A can be entangled with the nonwoven fabric of the exterior sheet 12 and locked. In this case, the target sheet 12T may be provided between the exterior sheet 12 and the liquid-impermeable sheet 11.

(End flap)
The end flap portions EF are portions that extend to the front side and the rear side of the absorbent main body portion 10 respectively, and are portions that do not have the absorbent element 50, and the front side extension portion is a ventral end flap portion EF. Yes, the rear extension part is the back end flap part EF.
The length in the front-rear direction of the back end flap EF is preferably the same or shorter than the length in the front-rear direction of the attachment portion of the fastening tape 13, and if the diaper back end and the absorbent element 50 are too close to each other. Since the gap between the dorsal side end of the diaper and the body surface is likely to occur due to the thickness and stiffness of the absorbent element 50, the thickness is preferably 10 mm or more.
The length in the front-rear direction of the ventral end flap portion EF and the back end flap portion EF is preferably about 5 to 20% of the length L in the front-rear direction of the entire diaper. In diapers for infants, 10-60 mm, In particular, a thickness of 20 to 50 mm is appropriate.

(Back elastic sheet)
In the illustrated form, a belt-like back-side elastic sheet 70 that elastically expands and contracts in the width direction is provided between the fastening tapes 13 to improve the fit in the diaper back side. Both end portions of the back-side elastic sheet 70 are preferably extended to a portion that overlaps with the attachment portions of both fastening tapes 13, but may be separated to the center in the width direction. The back-and-forth stretchable sheet 70 has a front-rear dimension that is approximately the same as the front-rear dimension of the attachment portion of the fastening tape 13, but may have a dimensional difference of about ± 20%. Further, when the back elastic sheet 70 is arranged so as to overlap the boundary line between the back end flap BE and the absorbent element 50 as shown, the back end of the absorbent element 50 is firmly pressed against the body. Therefore, it is preferable. The back-side elastic sheet 70 may use a sheet-like elastic member such as a rubber sheet, but it is preferable to use a nonwoven fabric or paper from the viewpoint of air permeability. In this case, a sheet-like elastic member having air permeability such as a stretchable nonwoven fabric can be used. However, as shown in FIG. 5, the sheet base material 71 such as two nonwoven fabrics is bonded with an adhesive such as a hot melt adhesive. In addition to bonding, the elastic elastic member 72 such as a perforated sheet, net, or elongated (thread or string) is fixed between the sheet bases 71 in a state of being stretched along the width direction. Preferably used. As the sheet base 71 in this case, the same one as the exterior sheet 12 can be used. The stretch rate of the waist elastic elastic member 72 is preferably about 150 to 250%. Moreover, when using the thing (string shape, string shape, etc.) of elongate elastic bodies 72 as a waist circumference elastic member, it is preferable to provide about 5-15 things with a thickness of 420-1120dtex at intervals 72d of 3-10 mm.

  Further, as shown in the drawing, it is preferable to arrange a part of the waist elastic stretch member 72 so as to cross the absorbent element 50 because the fit of the absorbent element 50 is improved, but in this case, the waist elastic stretch member 72 is preferable. If the contraction force is prevented from acting on a part or all of the portion overlapping the absorbent element 50 by means such as cutting, the back end portion of the absorbent element 50 does not shrink in the width direction, so that the fit is further improved. .

  The waist elastic elastic member 72 may be fixed over the entire length of the sheet base material 71 in the longitudinal direction of the sheet (width direction of the diaper), but in order to prevent shrinkage and curling when attached to the diaper main body, In the range of about 5 to 20 mm at the end in the front-rear direction (diaper width direction) of the seat, it is preferable that the contraction force does not work or the waist elastic elastic member 72 does not exist.

  In the illustrated form, the back-side stretchable sheet 70 is sandwiched between the three-dimensional gather sheet 62 and the exterior sheet 12 on both sides in the width direction of the liquid-impermeable sheet 11, and in a portion overlapping the liquid-impermeable sheet 11. Although provided so as to be sandwiched between the impermeable sheet 11 and the absorbent element 50, it may be provided between the liquid impermeable sheet 11 and the exterior sheet 12 or provided on the outer surface of the exterior sheet 12. It may also be provided between the topsheet 30 and the absorbent element 50. Further, the back-side elastic sheet 70 may be provided on the top sheet 30. In this case, the back-side elastic sheet 70 may be provided on the three-dimensional gather sheet 62 on both sides in the width direction of the liquid-impermeable sheet 11. Further, when the exterior sheet 12 is formed by stacking a plurality of sheet base materials, the entire back-side stretchable sheet 70 may be provided between the sheet base materials of the exterior sheet 12.

  On the other hand, in the present invention, as the elastic elastic member 72 around the waist, similarly to the elastic elastic members 64 and 84 around the legs, the first elastic elastic member provided detachably, and the second elastic member left without being removed. Providing an elastic elastic member is also proposed (not shown). In this case, the user can adjust the tightening pressure of the planar gathers in the direction of loosening by removing the elastic elastic member around the first waist from the diaper as necessary. That is, when the tightening pressure is too strong, the tightening pressure can be reduced by removing the elastic elastic member around the first body, and the tightening pressure can be reduced only by the elastic member around the second body. It should be noted that the form having the first and second waistline elastic elastic members can be combined with the above-described form having the first and second leg elastic elastic members 84 and 64, and can be used alone. It is also possible not to employ a form having an elastic elastic member around the second leg. The configuration having the first and second waist elastic elastic members can be configured in the same manner as the first and second leg elastic elastic members 84 and 64, and details thereof are described above. Since the “leg” in the description of the elastic members 84 and 64 around the first and second legs may be replaced with “trunk”, the description is omitted here.

  The present invention is suitable for a tape-type disposable diaper, but can also be used for other forms of disposable diapers such as a pants-type disposable diaper.

  DESCRIPTION OF SYMBOLS 11 ... Liquid impervious sheet, 12 ... Exterior sheet, 30 ... Surface sheet, 40 ... Intermediate sheet, 50 ... Absorbing element, 56 ... Absorber, 58 ... Packaging sheet, 60 ... Solid gather, 62 ... Solid gather sheet, 64 ... elastic elastic member around the second leg, 70 ... back elastic sheet, 12T ... target sheet, 80 ... presser sheet, 84 ... elastic elastic member around the first leg.