JP2019170536A - Disposable absorbent article - Google Patents

Abstract

To provide a disposable absorbent article with improved air permeability.SOLUTION: The disposable absorbent article comprises a non-stretchable area which is provided in a range having an absorber, and a stretchable area provided in a range having no absorber, on at least one of the exterior bodies constituting a front body and back body. The stretchable area has an inner sheet layer and an outer sheet layer, and a plurality of slender elastic stretchable members fitted between the inner sheet layer and the outer sheet layer, and is an area elastically stretched in a width direction followed by extension/contraction of the elastic stretchable members. The non-stretchable area has the inner sheet layer and the outer sheet layer continuous from the stretchable area, and unnecessary elastic stretchable members left between the inner sheet layer and the outer sheet layer, and is an area not elastically stretched in the width direction. In a range having no absorber, the non-stretchable area is provided on an absorber side of the exterior body in the width direction, and the stretchable is provided on both side parts of the exterior body in the width direction. On at least a part of the non-stretchable area in the range having no absorber, a through-hole penetrating at least one of the inner sheet layer and the outer sheet layer is provided.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a disposable absorbent article in which a non-stretchable region is provided in a region that does not overlap an absorber in at least one of an exterior body that constitutes a front body and an exterior body that constitutes a back body.

  For absorbent articles such as disposable diapers, techniques have been developed for improving fit to the wearer from the viewpoints of preventing leakage of urine and improving ease of movement.

  For example, Patent Document 1 listed below discloses an invention that improves fit by using a stretchable film and changing the width of a non-stretchable region from the crotch side toward the waist side. In the following Patent Document 2, the inner body expands and contracts in the width direction by disposing the non-stretched elastic member, not the stretched elastic member, in a portion overlapping the interior body of the exterior body. An invention for preventing the fit from being lowered is disclosed.

JP-A-2006-185265 JP 2013-017552 A

  However, as the fit of the disposable absorbent article to the wearer improves, the space between the absorbent article and the wearer's skin surface decreases, and the air permeability decreases. As a result, there is a problem that rough skin is likely to occur.

  As described above, since the improvement in fit and the improvement in air permeability are in a trade-off relationship, it is difficult to improve both at the same time.

  Then, the main subject of this invention is providing the disposable absorbent article which improved air permeability. The subject which this invention follows is providing the disposable absorbent article which aimed at the improvement of breathability, and aiming at the improvement of fitting property.

The present invention that has solved the above problems is as follows.
(1) An interior body that includes an exterior body that constitutes the front body and an exterior body that constitutes the back body individually or integrally, and includes an absorber that extends from the exterior body that constitutes the front body to the exterior body that constitutes the back body. The body is attached,
The both sides of the exterior body constituting the front body and the both sides of the exterior body constituting the back body are joined, respectively, and a waist opening and a pair of left and right leg openings are formed,
At least one of the outer body constituting the front body and the outer body constituting the rear body has a non-stretchable region provided in at least a part of the range having the absorber, and a range not having the absorber. Having at least a stretchable region provided in part,
The stretchable region is formed of a plurality of elongated sheets attached along the width direction at intervals in the front-rear direction between the inner sheet layer, the outer sheet layer, and the inner sheet layer and the outer sheet layer. An elastic elastic member, and is an area that elastically expands and contracts in the width direction with expansion and contraction of the elastic elastic member,
The non-stretchable region has the inner sheet layer and the outer sheet layer continuous from the stretchable region, and an unnecessary elastic stretchable member remaining between the inner sheet layer and the outer sheet layer, and is elastic in the width direction. It is an area that does not stretch,
In a range that does not have the absorber, the non-stretchable region is provided on the absorber side in the width direction of the exterior body, and the stretchable region is provided on both sides in the width direction of the exterior body. ,
A disposable absorbent article, wherein a through-hole penetrating at least one of the inner sheet layer and the outer sheet layer is provided in at least a part of the non-stretchable region in a range not having the absorber.

(Function and effect)
In at least one of the exterior body constituting the front body and the exterior body constituting the back body, a through hole is provided in a range not having the absorber (that is, a range not overlapping with the absorber; hereinafter the same). Therefore, the air permeability can be improved. This through hole penetrates at least one of the inner sheet layer and the outer sheet layer, but if both the inner sheet layer and the outer sheet layer are penetrated, the air permeability can be further improved.

  In addition, in the range that does not have the absorber of the outer package, by providing a non-stretchable region that does not shrink on the absorber side in the width direction of the outer package, the edge in the width direction of the absorber is likely to rise away from the outer package, The fit of the absorber to the wearer is improved. Furthermore, since the non-stretchable region does not contract, it is possible to suppress the contraction of the widthwise end portion of the absorbent body in the width direction compared to the case where the non-stretchable region is not provided. As a result, the area where the absorbent body covers the skin surface of the wearer can be increased, and the fit can be improved.

(2) The said through-hole is a disposable absorbent article as described in said (1) which is a cutting trace of the said elastic elastic member.

(Function and effect)
Examples of the method for providing the non-stretchable region include a method of cutting the elastic stretchable member by pressing a cutter or the like. If the through-hole is provided in at least one of the inner sheet layer and the outer sheet layer simultaneously with the cutting of the elastic elastic member by the cutter or the like, the manufacturing process can be simplified and the manufacturing time can be shortened.

(3) The length in the width direction of the non-stretchable region provided in the range that does not include the absorber of the exterior body is:
The disposable absorbent article according to (1), wherein a lower end portion of a waistline region of the exterior body is long and decreases from the lower end portion toward at least one of a waist side and a crotch side of the exterior body.

(Function and effect)
Generally, the waist side end part (namely, the top part of a buttocks, and the same hereafter) of the crack of a wearer's buttocks is often located on the lower end part of the waist area of the exterior body which constitutes the back body. Since the top part of the wearer's buttocks is the part where the circumference of the buttocks is the longest, it is preferable to keep the width of the absorber of the part widest. Therefore, in the present invention, at the lower end of at least one waistline region of the outer body of the front body and the outer body of the rear body, the length in the width direction of the non-stretchable region is lengthened, and the absorber positioned at the lower end It was set as the structure which prevents the shrinkage | contraction to the inner side of the width direction more. Preferably, the length in the width direction of the non-stretchable region provided in the range that does not have the absorber of the outer body of the back body is changed as described in (3) above.

  On the other hand, since the vicinity of the waist side end of the absorber is far from the urination port, the urine fluid is difficult to reach. At the same time, if the shrinkage of the waist side end portion is gentle, the upper end portion of the absorbent article tends to bend, and the absorbent article tends to slip off. Therefore, the width of the non-stretchable region is shortened from the lower end of the waistline region toward the waist.

  Moreover, since the crotch part side of the absorbent body is sandwiched between the legs of the wearer and contracts, there is little need to dare to provide a non-stretchable region in the exterior body. Moreover, the perimeter of the collar part is also shorter than the top part of the collar part. For this reason, the width of the non-stretchable region is shortened from the lower end of the waistline region toward the crotch portion.

  The length in the width direction of the non-stretchable region is gradually shortened from the lower end of the waistline region of the exterior body constituting the back body toward at least one of the waist side and the crotch side of the exterior body. Including the form, the form which becomes shorter step by step, the part where the width becomes longer in part, and the form which becomes shorter as a whole. When the length of the width of the non-stretchable region is gradually changed, there is an advantage that manufacture is easier than in the case where the width is suddenly changed.

(4) In the lower end portion of the waistline region of the exterior body,
The total length in the width direction of the non-stretchable region in the range not having the absorber of the exterior body is 30% to 50% of the total length in the width direction in the range not having the absorber of the exterior body (1 ) Disposable absorbent article.

(Function and effect)
When the total length in the width direction of the non-stretchable region is shorter than 30%, the effect of improving the fit of the absorber is reduced. On the other hand, if the total length in the width direction of the non-stretchable region is longer than 50%, the absorbent article tends to slip off. Therefore, it is preferable that the total length in the width direction of the non-stretchable region is approximately 30% to 50% of the total length in the width direction in a range that does not include the outer body absorber.

(5) In any one of the exterior body constituting the front body and the exterior body constituting the back body,
The length in the width direction of the non-stretchable region provided in the range that does not have the absorber of the exterior body is:
The lower end portion of the waistline region of the exterior body is long, and gradually decreases from the lower end portion toward the waist side of the exterior body,
In the other exterior body of the exterior body constituting the front body and the exterior body constituting the back body,
The length of the non-stretchable region provided in the exterior body in the width direction is:
The disposable absorbent article according to (1), wherein a waist side end portion of the absorbent body is long and gradually shortens from the waist side end portion toward the crotch side.

(Function and effect)
In any one of the exterior body constituting the front body and the exterior body constituting the back body, when the length in the width direction of the non-stretchable region in the lower end portion of the waistline region is increased, the circumferential direction of the lower end portion There is a problem that the tightening force is weakened.

  In order to solve this problem, in the other exterior body of the exterior body constituting the front body and the exterior body constituting the back body, the length in the width direction of the non-stretchable region connected to the lower end portion in the circumferential direction is shortened. . Thereby, the fall of clamping force can be prevented.

  Further, in any one of the exterior body constituting the front body and the exterior body constituting the back body, the length in the width direction of the non-stretchable region provided in the range not having the absorber of the exterior body, The length gradually decreases toward the waist end of the absorber. Therefore, the tightening force is increased toward the diaper waist side.

  In the disposable absorbent article, the wearing feeling is improved by changing the tightening force from the waist side toward the crotch side as much as possible. In order to obtain such an effect, in the other exterior body of the exterior body constituting the front body and the exterior body constituting the back body, the length in the width direction of the non-stretchable region provided in the exterior body is set to the waist side. The length is made longer at the end and gradually shorter from there toward the crotch side.

  For example, when the width of the non-stretchable region is increased at the lower end of the waistline region of the exterior body constituting the back body, the width of the non-stretchable region at the bottom end of the waistline region of the exterior body constituting the front body Reduce the length of. In addition, when the length of the width of the non-stretchable region is reduced from the lower end of the waistline region of the exterior body constituting the back body toward the waist, the lower end of the waistline region of the exterior body constituting the front body The width of the non-stretchable region is increased from the portion toward the waist. Furthermore, when the length of the width of the non-stretchable region is shortened from the lower end of the waistline region of the exterior body constituting the back body toward the crotch side, the lower end of the waistline region of the exterior body constituting the front body The width of the non-stretchable region is shortened from the portion toward the crotch side.

  In such a case, the length in the width direction of the non-stretchable region in the circumferential direction of the absorbent article (the width of the non-stretchable region provided in the front body and the width of the non-stretchable region in the back body The total value is preferably substantially the same length (constant length) at any point in the front-rear direction from the waist side to the crotch side of the absorbent article. Here, substantially the same length means that the total value is slightly different at any point in the front-rear direction from the waist side to the crotch side of the absorbent article, and that the total value is slightly different. This includes cases where The difference in the total value is preferably within a range of about 10 mm, and more preferably within a range of about 5 mm.

(6) A design sheet having a design is provided on at least one of the front exterior body and the rear exterior body,
The disposable absorbent article according to (1), wherein a region where the design sheet is provided overlaps a region where the through hole is provided.

(Function and effect)
If a through-hole is provided in a portion of the exterior body that does not overlap with the interior body, the outside air will directly touch the wearer's skin. There is a problem that there is a high possibility of feeling. Moreover, since the wearer's skin is visible from the outside, there is a problem that the appearance is not good. Furthermore, since the strength of the exterior body is lowered, there is also a problem that it is easily broken when worn.

  Therefore, by providing a design sheet as in the present invention, it is possible to reduce discomfort due to the influence of outside air, improve the appearance, and improve the strength of the exterior body. In addition, by using a design sheet that gives a character design to the absorbent article and covering the through hole, the increase in the number of materials is suppressed compared to the case where a sheet used only to cover the through hole is provided. be able to.

(7) In the non-stretchable region, the elastic stretchable member is cut into a plurality of pieces,
The cut elastic elastic member is fixed to at least one of the inner sheet layer and the outer sheet layer,
A through hole is provided in the sheet layer to which the cut elastic elastic member is fixed,
The disposable absorbent article according to (1), wherein the sheet layer contracts due to contraction of the cut elastic elastic member, and the through hole is widened.

(Function and effect)
Since the cut elastic elastic member contracts, the through hole is widened, so that the air permeability is improved.

  In the non-stretchable region, when the elastic stretchable member is not fixed, the elastic stretchable member is drawn to the outermost side in the width direction of the non-stretchable region regardless of the cut portion of the elastic stretchable member. Therefore, in such a case, although there is no widening effect of the through-holes as described above, the stretchability of the non-stretchable region is almost only the stretchability of the nonwoven fabric itself, so that the fit property at the heel portion can be improved.

  As mentioned above, according to this invention, the disposable absorbent article which improved air permeability can be provided. Moreover, while improving air permeability, the disposable absorbent article which improved the fitting property can be provided.

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. It is a top view which shows the formation method of a non-expandable area | region.

  Hereinafter, preferred examples of the absorbent article 1 according to the present invention will be described with reference to the drawings. The following description and drawings are merely examples of embodiments of the present invention, and the contents of the present invention should not be construed as being limited to these embodiments.

<Example of pants-type disposable diapers>
1-6 has shown an example of the underpants type disposable diaper. This pants-type disposable diaper includes a front exterior body 12F that constitutes at least a waist part of the front body F, a rear exterior body 12B that constitutes at least a waist part of the rear body B, and a crotch part from the front exterior body 12F. The exterior body 12F is provided with an interior body 200 provided on the exterior body 12F so as to extend to the rear exterior body 12B, and both side portions of the front exterior body 12F and both side portions of the rear exterior body 12B are joined. By forming the side seal portion 12A, the openings formed by the front and rear end portions of the exterior bodies 12F and 12B become waist openings through which the wearer's torso passes, and the exterior bodies 12F and 12B are formed on both sides in the width direction of the interior body 200. The portions surrounded by the lower edge and the side edges of the interior body 200 are leg openings through which the legs pass. The interior body 200 is a part that absorbs and holds excrement such as urine, and the exterior bodies 12F and 12B are parts for supporting the interior body 200 with respect to the wearer's body. Moreover, the code | symbol Y has shown the full length (front-back direction length from the edge of the waist opening of the front body F to the edge of the waist opening of the back body B) in the expansion | deployment state, and the code | symbol X has the full width of the diaper in the expansion | deployment state. Is shown.

  The pants-type disposable diaper of the present embodiment includes 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 portion that forms the leg opening LO. An intermediate region L defined as a front-rear direction range (between a front-rear direction region having the side seal portion 12A of the front body F and a front-rear direction region having the side seal portion 12A of the rear body B). The waistline region T can be divided into a “waist portion” W that conceptually forms the edge of the waist opening and a “waist lower portion” U that is a lower portion than this. Usually, in the case where there is a boundary in the waistline region T in which the width direction expansion / contraction stress changes (for example, the thickness or elongation rate of the elastic expansion / contraction member changes), the waist opening WO side is closer to the waist opening than the boundary on the waist opening WO side. When there is no such boundary, the waist opening WO side becomes the waist portion W with respect to the absorbent body 56 or the interior body 200. These lengths in the front-rear direction vary depending on the size of the product and can be determined as appropriate. For example, the waist portion W may be 15 to 40 mm and the waist lower portion U may be 65 to 120 mm. On the other hand, both side edges of the intermediate region L are wrapped in a U-shape or a curved shape along the circumference of the leg of the wearer, and this is a portion into which the wearer's leg is put. As a result, the unfolded pants-type disposable diaper has a substantially hourglass shape as a whole.

(Interior body)
The interior body 200 can take any shape, but is rectangular in the illustrated form. As shown in FIGS. 3 to 5, the interior body 200 includes a top sheet 30 disposed on the body side, a liquid-impermeable sheet 11 disposed on the back surface side of the top sheet 30, and a gap therebetween. This is a main body that has an absorbing 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. These show the rising gathers 60 that stand on the body side and are provided on both sides of the interior body 200 in order to prevent excrement from leaking to both sides of the interior body 200.

(Top sheet)
The top sheet 30 has liquid permeability, and examples thereof include a porous or non-porous nonwoven fabric and a porous plastic sheet. 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.

  Both side portions of the top sheet 30 may be folded back to the back side at the side edge of the absorbent element 50, or may be projected to the side from the side edge of the absorbent element 50 without being folded back.

  It is desirable to fix the top sheet 30 to a member adjacent to the back side by a joining means by material welding such as heat sealing or ultrasonic sealing, or by a hot melt adhesive.

(Intermediate sheet)
In order to quickly transfer the liquid that has passed through the top sheet 30 to the absorber 56, an intermediate sheet (also referred to as “second sheet”) 40 having a higher liquid permeation rate than the top sheet 30 can be provided. The intermediate sheet 40 is for promptly transferring the liquid to the absorber 56 to improve the absorption performance of the absorber 56 and preventing the “reverse” phenomenon of the absorbed liquid from the absorber 56. The intermediate sheet 40 can be omitted.

Examples of the intermediate sheet 40 include the same material as the top sheet 30, spunlace nonwoven fabric, spunbond nonwoven fabric, SMS nonwoven fabric, pulp nonwoven fabric, mixed sheet of pulp and rayon, point bond nonwoven fabric, 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 ^{17~80g / 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 example is disposed in the center shorter than the width of the absorber 56, but may be provided over the entire width of the absorber 56. The length in the front-rear 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.

  It is desirable that the intermediate sheet 40 be fixed to a member adjacent to the front side or the back side by a joining means by material welding such as heat sealing or ultrasonic sealing, or a hot melt adhesive.

(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. The liquid-impermeable sheet 11 is preferably made of a liquid-impermeable 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 fibers, leakproof reinforcement by reducing the voids of the fibers by applying heat or pressure, and methods such as coating with a 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, but it is desirable to use a resin film.

  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.

(Get up gather)
The rising gather 60 is for preventing side leakage, extends across the entire front-rear direction LD along both side portions of the interior body 200, and stands up from the side of the interior body 200 to the front side.

  In the rising gather 60 shown in FIGS. 1, 3 and 4, the base portion 60B rises obliquely toward the center in the width direction, and the tip end portion 60A rises obliquely outward in the width direction from the intermediate portion. However, the present invention is not limited to this, and appropriate modifications such as a form of standing up in the center in the width direction as a whole are possible.

  More specifically, the rising gather 60 in the illustrated example folds the belt-shaped gathered nonwoven fabric 62 having a length equal to the length in the front-rear direction of the interior body 200 in the width direction WD at the tip portion and folded in two. In addition to overlapping, a plurality of elongated gather elastic members 63 are fixed along the longitudinal direction and spaced apart in the width direction WD between the folded portion and the sheet in the vicinity thereof. The base end portion (the end portion on the side opposite to the sheet folding portion in the width direction WD) of the rising gather 60 opposite to the front end portion is fixed to the side portion on the back side of the liquid-impermeable sheet 11 in the interior body 200. A portion 65 other than the root portion 65 is a main body portion 66 (a portion on the folded portion side) extending from the root portion 65. The main body portion 66 includes a root side portion 60B extending toward the center in the width direction, and a tip side portion 60A that is folded back at the tip of the root side portion 60B and extends outward in the width direction. This form is a surface contact type rising gather 60, but a line contact type rising gather 60 that is not folded outward in the width direction can also be used. And while the both ends of the front-back direction among the main body parts 66 are set to the fall-down part 67 fixed with respect to the side part surface of the top sheet 30 in a lying state, the front-back direction intermediate part located between these is not fixed. The gather elastic member 63 along the front-rear direction LD is fixed in an extended state to at least the tip of the free portion 68.

  In the rising gather 60 configured as described above, the contraction force of the gather elastic member 63 acts so as to bring the both ends in the front-rear direction closer, but the both ends of the main body portion 66 are fixed so as not to stand up. On the other hand, since there is a non-fixed free portion 68 between them, only the free portion 68 stands up so as to abut on the body side as indicated by an arrow in FIG. In particular, when the root portion 65 is positioned on the back side of the interior body 200, the free portion 68 stands up so as to open outward in the width direction at and around the crotch portion, so that the rising gather 60 abuts on the surface around the legs. As a result, the fit is improved.

  Like the rising gather 60 in the illustrated example, the main body portion 66 is a bent portion including a root side portion 60B extending toward the center in the width direction and a tip side portion 60A that is folded back at the tip of the root side portion 60B and extends outward in the width direction. In the form, at the lying down portion 67, the tip side portion 60A and the root side portion 60B are joined in the lying down state, and the root side portion 60B is joined to the top sheet 30 in the lying down state. At least one of a hot melt adhesive by various coating methods and a material welding method such as heat sealing or ultrasonic sealing can be used for joining the opposing surfaces in the lying portion 67.

The gathered non-woven fabric 62 is made of a spunbonded non-woven fabric (SS, SSS, etc.), an SMS non-woven fabric (SMS, SSMMS, etc.), a melt-blown non-woven fabric with excellent uniformity and concealment, and water-repellent with silicone or the like if necessary. A treated product can be suitably used, and the fiber basis weight is preferably about 10 to 30 g / m ² . As the gather 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%. Moreover, as shown in the drawing, a waterproof film 64 can be interposed between the gathered nonwoven fabrics 62 folded in two. In this case, the gathered nonwoven fabric 62 is partially omitted in the portion where the waterproof film 64 is present. However, in order to make the appearance and feel of the product like a cloth, it is necessary that at least the outer surface from the base end to the front end of the gather 60 is formed of the gathered nonwoven fabric 62 as shown in the illustrated example. is there.

  The number of gather elastic members 63 is preferably 2-6, and more preferably 3-5. A suitable arrangement interval is 3 to 10 mm. If comprised in this way, it will become easy to hit | skin with respect to skin in the range which has arrange | positioned the gather elastic member 63. The gather elastic member 63 may be disposed not only at the tip side but also at the base side.

  The dimensions of the rising gather 60 in the illustrated example can be appropriately determined. However, in the case of an infant paper diaper, for example, as shown in FIG. 3, the standing height of the rising gather 60 (the length in the width direction of the main body portion 66 in the unfolded state). ) W2 is preferably 15 to 60 mm, particularly preferably 20 to 40 mm. Further, it is preferable that the separation distance W1 between the innermost folds in a state where the rising gather 60 is parallel to the surface of the top sheet 30 is 60 to 190 mm, particularly 70 to 140 mm.

(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 degree of crimp of the crimped fibers can be, for example, about 5 to 75, preferably 10 to 50, and more preferably about 15 to 50 per 2.54 cm. Moreover, the crimped fiber crimped uniformly can be 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 absorber 56 itself and the rising 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 that individually configure the front body F and the back body B correspond to the former form, and the exterior body 12 that integrally configures the front body F and 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. is 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

  The exterior bodies 12F and 12B are formed by joining the outer sheet layer 12S and the inner sheet layer 12H by a joining means such as a hot melt adhesive or welding. The sheet material for forming the outer sheet layer 12S and the sheet material for forming the inner sheet layer 12H are a single sheet material as shown in FIG. 5 and are individually separated as shown in FIG. It can also be a sheet material. That is, in the former case, the inner sheet layer 12H and the outer sheet layer 12S are respectively formed by the inner part and the outer part of one sheet material folded at the edge of the waist opening WO (may be the crotch edge). Is done. In the former form, there is an advantage that the inner sheet layer 12H and the outer sheet layer 12S are not easily displaced, and the latter form has an advantage that the number of sheet materials is small.

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, polyamides, etc. 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)
And in the exterior bodies 12F and 12B, in order to improve the fit with respect to the wearer's waist, elongated elastic elastic members 15 to 19 such as thread rubber are provided between the outer sheet layer 12S and the inner sheet layer 12H. An expansion / contraction region is formed that elastically expands and contracts in the width direction with the expansion and contraction of the elastic expansion / contraction member. In this stretchable region, in the natural length state, the outer sheet layer 12S and the inner sheet layer 12H are shrunk with the shrinkage of the elastic stretchable member to form wrinkles or wrinkles, and when stretched in the longitudinal direction of the elastic stretchable member, The outer sheet layer 12 </ b> S and the inner sheet layer 12 </ b> H can be stretched to a predetermined stretch rate that can be fully stretched. As the elongated elastic elastic members 15 to 19, synthetic rubber or natural rubber may be used. For bonding the outer sheet layer 12S and the inner sheet layer 12H in the exterior bodies 12F and 12B and fixing the elongated elastic members 15 to 19 sandwiched between them, hot melt adhesives and heat seals by various coating methods are used. At least one of fixing means by material welding such as an ultrasonic seal can be used. Since the flexibility is lost when the entire exterior bodies 12F and 12B are firmly fixed, it is preferable that the portions other than the adhesive portions of the elongated elastic elastic members 15 to 19 are not adhered or weakly adhered. In the illustrated embodiment, a hot melt adhesive is applied only to the outer peripheral surfaces of the elongated elastic elastic members 15 to 19 by an application means such as a comb gun or a sure wrap nozzle, and sandwiched between both sheet layers 12S and 12H, thereby forming the elongated shape. With only the hot melt adhesive applied to the outer peripheral surfaces of the elastic elastic members 15 to 19, fixing the elongated elastic elastic members 15 to 19 to both the sheet layers 12S and 12H and fixing between the two sheet layers 12S and 12H It has a structure to do. The elastic 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.

More specifically, between the outer sheet layer 12S and the inner sheet layer 12H in the waist part W of the exterior bodies 12F and 12B, a plurality of waist elastic elastic members 17 are vertically spaced so as to be continuous over the entire width direction. It is installed with a gap. Moreover, about the 1 or several arrange | positioned by the area | region adjacent to the waist lower part U among the waist part elastic elastic members 17, you may overlap with the interior body 200 or the width direction which overlaps with the interior body 200 You may each provide in the width direction both sides except a center part. As the waist resilient and elastic members 17, the thickness 155～1880Dtex, particularly about 470～1240Dtex (the case of synthetic rubber. Cross-sectional area in the case of natural rubber 0.05 to 1.5 mm ^2, in particular 0.1 to 1 the rubber thread .0mm about ²⁾ is preferably provided about 3 to 22 present at intervals of 4 to 12 mm, which according to the width direction of elongation of the waist portion W 150 to 400%, especially at about 220 to 320 percent Preferably there is. Further, the waist portion W does not need to use the waist elastic elastic member 17 having the same thickness in all of the front and rear directions or have the same elongation rate. The thickness and elongation rate may be different.

  In addition, a plurality of waist lower elastic elastic members 15 and 19 made of an elongated elastic elastic member are vertically spaced between the outer sheet layer 12S and the inner sheet layer 12H in the waist lower part U of the exterior bodies 12F and 12B. It is installed with a gap.

The waist lower elastic elastic members 15 and 19 have a thickness of 155 to 1880 dtex, especially about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , particularly 0.1. the rubber thread ~1.0mm about ^2), 1 to 15 mm, particularly 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 the 200 to 350% In particular, it is preferably about 240 to 300%.

  Further, a plurality of cover elastic elastic members 16 made of an elongated elastic elastic member are vertically spaced between the outer sheet layer 12S and the inner sheet layer 12H in the buttock cover part 14 of the rear exterior body 12B. It is attached.

The cover elastic elastic member 16 has a thickness of 155 to 1880 dtex, especially about 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, the cross-sectional area is 0.05 to 1.5 mm ² , particularly 0.1 to 1. the rubber thread 0mm about ^2), 5 to 40 mm, particularly preferably to dispose about 2 to 10 present at intervals of 5 to 20 mm, which width direction of elongation of the cover portion by 150 to 300%, in particular 180 to 260 % Is preferred.

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

  When the elastic elastic members 15, 16, and 19 are provided in the front-rear direction range having the absorbent body 56, such as the waist lower part U and the buttock cover part 14 in the illustrated form, the width of the absorbent body 56 in part or all thereof. In order to prevent the shrinkage in the direction, a part or the whole of the portion overlapping the absorbent body 56 in the width direction is set as the non-stretchable region 26 (26A). On the other hand, the contraction region 27 is provided in at least a part of the portion that does not overlap the absorbent body 56 in the width direction.

  In the embodiment of FIG. 2, the non-stretchable region 26 (26B) is provided on the absorber 56 side in the width direction of the rear exterior body 12B in the portion B that does not overlap the absorber 56 of the rear exterior body 12B. The stretchable region 28 is provided on both side portions (side seal 12A side) in the width direction of the rear exterior body 12B. As a result of providing the non-stretchable region 26 (26B) in the portion B of the rear exterior body 12B that does not overlap the absorber 56, the edge in the width direction of the absorbent body 56 is likely to rise away from the rear exterior body 12B. The fit of the absorbent body 56 to the wearer is improved. Further, since the non-stretchable region 26 (26B) does not shrink, it is possible to suppress shrinkage of the end portion in the width direction of the absorbent body 56 inward in the width direction as compared with the case where the non-stretchable region 26 (26B) is not provided. . As a result, when the diaper is worn, the area where the absorbent body 56 covers the skin surface of the wearer's buttocks can be increased, and the fit can be improved.

  The length in the width direction of the non-stretchable region 26 (26B) provided in the portion B that does not overlap the absorber 56 of the rear exterior body 12B is longer at the lower end 45 of the waist region T of the rear exterior body 12B. And gradually decreases from the lower end 45 toward the waist of the rear exterior body 12B. Furthermore, the length gradually decreases from the lower end 45 toward the crotch side of the rear exterior body 12B.

  The top part of the wearer's buttocks often overlaps on the lower end 45 of the waistline region T of the rear exterior body 12B. Since the top part of the wearer's buttocks is the part where the circumference of the buttocks is the longest, it is preferable to maintain the width of the absorbent body 56 at the widest part. Therefore, in the present embodiment, in the lower end portion 45 of the waistline region T of the rear exterior body 12B, the length in the width direction of the non-stretchable region 26 (26B) is increased, and the width direction of the absorber 56 on the lower end portion 45 is increased. The structure prevents inward shrinkage.

  On the other hand, since it is farther from the urination port as it goes toward the waist W of the absorber 56, the urine fluid is difficult to reach. Moreover, when the shrinkage | contraction of the waist part W is loose, the upper end part of a disposable diaper will be easy to bend, and it will become easy to slip off. Therefore, the width of the non-stretchable region 26 (26B) is gradually shortened from the lower end 45 toward the waist.

  Moreover, since the crotch part side of the absorber 56 is sandwiched and contracted between the legs of the wearer, it is necessary to dare to provide the non-stretchable region 26 (26B) in a portion that does not overlap the absorber 56 of the rear exterior body 12B. There is little nature. Moreover, the perimeter of the collar part is also shorter than the top part of the collar part. Therefore, the width of the non-stretchable region 26 (26B) is shortened from the lower end 45 of the waistline region T toward the crotch portion.

  In addition, when the length of the width of the non-stretchable region 26 (26B) is gradually changed as in the present invention, there is an advantage that manufacture is easier than in the case where the width is suddenly changed.

  At the lower end portion 45 of the waistline region T of the rear exterior body 12B, the total length in the width direction of the non-stretchable region 26 (26B) in the portion B of the rear exterior body 12B that does not have the absorber 56 is that of the rear exterior body 12B. The length is 30% to 50% of the entire length in the width direction of the portion B not having the absorber 56. Since the rear exterior body 12B has the non-stretchable regions 26 (26B) on the left and right sides of the absorber 56, the total length in the width direction of the non-stretchable region 26 (26B) is the non-stretchable region 26 ( 26B) is a length obtained by doubling the length A1B in the width direction. Further, since the rear exterior body 12B includes the portions B that do not have the absorber 56 on the left side and the right side of the absorber 56, respectively, the total length in the width direction of the portion B that does not have the absorber 56 is the absorber. This is a length obtained by doubling the length in the width direction of the portion B not having 56. Specifically, the total length in the width direction of the portion B of the rear exterior body 12B that does not have the absorber 56 is set to 200 mm to 280 mm, and the non-stretchable region 26 in the portion B of the rear exterior body 12B that does not have the absorber 56 ( 26B) is preferably 60 mm to 140 mm.

  When the total length in the width direction of the non-stretchable region 26 (26B) is shorter than 30%, the effect of improving the fit of the absorber 56 is reduced. On the other hand, when the total length in the width direction of the non-stretchable region 26 (26B) is longer than 50%, the disposable diaper is likely to slip off. Therefore, the total length in the width direction of the non-stretchable region 26 (26B) is preferably about 30% to 50% of the total length in the width direction of the range B that does not include the absorber 56 of the rear exterior body 12B. .

  In the embodiment of FIG. 2, the length in the width direction of the non-stretchable region 26 provided in the front exterior body 12F is long at the waist side end of the absorbent body 56, and toward the crotch side from the waist side end. It is getting shorter. As described above, since the non-stretchable region 26 (26B) is provided in the portion B that does not overlap the absorber 56 of the rear exterior body 12B, the tightening force of the lower end 45 of the waist region T of the rear exterior body 12B is relatively high. It will drop to. In order to prevent the decrease, the tightening force of the lower end portion 45 of the waistline region T of the front exterior body 12F is improved.

  Further, as described above, the length in the width direction of the non-stretchable region 26 (26B) provided in the portion B that does not overlap the absorber 56 of the rear exterior body 12B becomes shorter toward the waist side end. Therefore, compared with the lower end portion 45 of the waistline region T, the tightening force of the waist side end portion is increased, and the balance of the tightening force is deteriorated as a whole disposable diaper. Therefore, the tightening force of the lower end portion 45 of the waistline region T of the front exterior body 12F is reduced, and the balance of the tightening force as a whole diaper is made as uniform as possible.

  Instead of using the structure of the front exterior body 12F in the above description, only the structure of the rear exterior body 12B may be used. In this case, in the front exterior body 12F, the non-stretchable region 26 (26A) may be provided only in a portion overlapping the absorber 56, or the non-stretchable region 26 may not be provided at all.

  In the above description, a structure in which the rear exterior body 12B and the front exterior body 12F are reversed may be employed.

  In addition, 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.

  The non-stretchable region 26 (26A, 26B) can be formed by cutting the elongated elastic stretchable members 15, 16, 17, 19. The cut elongated elastic elastic members 15, 16, 17, 19 are contracted, and unnecessary elastic elastic members 18 are generated at the ends of the elongated elastic elastic members 15, 16, 17, 19. That is, the non-stretchable region 26 (26A, 26B) remains between the inner sheet layer 12H and the outer sheet layer 12S continuous from the stretchable region 28, and the inner sheet layer 12H and the outer sheet layer 12S. It can be said that it has the unnecessary elastic elastic member 18 and is an area that does not elastically expand and contract in the width direction of the absorbent article.

(Through hole)
In the embodiment of FIG. 2, a plurality of through holes 46 are provided in the non-stretchable region 26 (26B) provided in the portion B that does not overlap the absorber 56 of the rear exterior body 12B. By providing the through hole 46 in the non-stretchable region 26 (26B), air permeability can be improved. In particular, after urinating, the absorbent body 56 and the vicinity of the absorbent body 56 are easily steamed. Therefore, by providing the through hole 48 in the non-stretchable region 26B located in the vicinity of the absorber 56, air permeability can be improved and stuffiness can be suppressed. The through hole 48 may be provided in the non-stretchable region 26 (26B) provided in the portion B that does not overlap the absorber 56 of the front exterior body 12F.

  The through hole 46 is a hole that penetrates at least one of the inner sheet layer 12H and the outer sheet layer 12S. From the viewpoint of improving the air permeability, it is preferable that the hole penetrates both the inner sheet layer 12H and the outer sheet layer 12S. Moreover, when providing the through-hole 46 in either one of the inner side sheet layer 12H and the outer side sheet layer 12S, it is preferable to provide in the inner side sheet layer 12H. This is because when the through hole 46 is provided in the inner sheet layer 12H, the contact area between the skin surface of the wearer and the inner sheet layer 12H is reduced, so that it is easy to experience an improvement in air permeability.

  Further, a plurality of through holes 46 may be provided on the entire surface of the non-stretchable region 26 (26B) in at least one of the rear exterior body 12B and the front exterior body 12F, or in a part of the non-stretchable region 26 (26B). One or more may be provided. Further, in at least one of the rear exterior body 12B and the front exterior body 12F, a through hole 46 may be provided on the entire surface or a part of the portion overlapping the absorber 56.

  Examples of the method for providing the non-stretchable region 26 described above include a method of cutting the elongated elastic elastic members 15, 16, 17, 19 by pressing a cutter or the like against the elongated elastic elastic members 15, 16, 17, 19. can do. At this time, it is preferable to provide the through-hole 46 in at least one of the inner sheet layer 12H and the outer sheet layer 12S at the same time that the elongated elastic elastic members 15, 16, 17, 19 are cut by a cutter or the like. This is because the manufacturing process is simplified and the manufacturing time can be shortened. In this case, the through hole 46 corresponds to a trace (cut trace) obtained by cutting the elongated elastic elastic members 15, 16, 17, and 19.

(Design sheet)
At least one of the front exterior body 12F and the rear exterior body 12B is provided with a design sheet 25 on which a character or the like is designed. The design sheet 25 is provided with a pattern that can be visually recognized from the outside for the purpose of improving the appearance. For example, in a disposable diaper for a child, a pattern such as a character or an animal that children are interested in is provided. Therefore, it is possible to communicate and educate parents and children when changing diapers. In the present invention, it is preferable to overlap the region where the design sheet 25 is provided with the region where the through hole 46 is provided.

  In the case where at least one of the front exterior body 12F and the rear exterior body 12B is provided with a through hole 46 in a portion that does not overlap the absorber 56, the outside air directly touches the wearer's skin. There is a problem that it is likely to feel uncomfortable because it is easily affected by outside air, such as feeling cold in winter. Moreover, since the wearer's skin is visible from the outside, there is a problem that the appearance is not good. Furthermore, since the strength of the exterior body is lowered, there is also a problem that it is easily broken when worn.

  Therefore, by providing the design sheet 25 so as to cover the portion where the through hole 46 is provided, it is possible to reduce discomfort due to the influence of outside air, improve the appearance, and improve the strength of the exterior body.

  4, the design sheet 25 is provided between the inner sheet layer 12H and the outer sheet layer 12S. However, the design sheet 25 may be provided on the skin surface side of the inner sheet layer 12H or on the back surface side of the outer sheet layer 12S. May be.

(Production method)
The following method can be illustrated as a manufacturing method of the non-stretchable region 26 and the through hole 46 of the absorbent article according to the present invention.

  For example, after applying an adhesive (such as a hot melt adhesive) continuously or intermittently on one of the inner sheet layer 12H and the outer sheet layer 12S, the elastic elastic members 15, 16, 17, 19 is placed and sandwiched between the other sheet layer of the inner sheet layer 12H and the outer sheet layer 12S. And a cutting member (cutter etc.) is pressed from the outer side, and at least any one of the elastic elastic members 15, 16, 17, 19 and the inner sheet layer 12H and the outer sheet layer 12S is cut.

  As another method, a through-hole 46 is provided in advance in one of the inner sheet layer 12H and the outer sheet layer 12S, and an adhesive (such as a hot melt adhesive) is continuously or intermittently provided on the sheet layer. After the application, the elastic elastic members 15, 16, 17, 19 are placed. Then, the sheet is sandwiched between the other sheet layer of the inner sheet layer 12H and the outer sheet layer 12S (the through hole 46 may or may not be provided in advance). Thereafter, a cutting member (cutter or the like) is pressed from the outside to cut the elastic elastic members 15, 16, 17, 19 and at least one of the inner sheet layer 12H and the outer sheet layer 12S.

<Others>
-Although the said example is an application example with respect to a pants type disposable diaper, it can apply to general absorbent articles, such as a tape type disposable diaper, a pad type disposable diaper, and a sanitary napkin.

  -Although only the location of the hot-melt-adhesive H in exterior body 12F, 12B was shown in FIG.4, FIG.5, FIG.8, the location where the hot-melt-adhesive H is apply | coated is not limited to these locations. For example, although not shown, it can be applied to various arbitrary locations such as between the interior body 200 and the exterior bodies 12F and 12B, the inside of the absorbent element 50, the rising gather 60, and the like.

  -The example of the cutting method of the elastic expansion-contraction members 15, 16, 17, and 19 was shown in FIG. (A) is the example which cut | disconnected the elastic elastic members 15 and 16 in the center of the width direction of the non-expanding-contraction area | region 26 using the cutting blade long in the front-back direction, (b) is the same cutting blade as (a) This is an example in which the elastic elastic members 15 and 16 are cut on the left side in the width direction of the non-expandable region 26. In (a) and (b), the elastic stretch members 15 and 16 are bonded to the interior sheet layer 12H (or the exterior sheet layer 12S) in the stretch region 28, and in the non-stretch region 26, the interior sheet layer 12H ( Or it is not bonded to the exterior sheet layer 12S). Therefore, when the elastic elastic members 15 and 16 are cut, the elastic elastic members 15 and 16 are drawn to the outermost side in the width direction of the non-expandable region 26. Then, since the stretchability of the non-stretchable region 26 is stretched only by the stretchability of the nonwoven fabric itself of the interior sheet layer 12H (or exterior sheet layer 12S), the fit at the heel portion can be improved.

  FIG. 9C shows an example in which the elastic elastic members 15 and 16 are cut by pressing an infinite number of point-like cutting blades over the entire non-expandable region 26. In this case, the elastic members 15 and 16 are bonded to the interior sheet layer 12H (or the exterior sheet layer 12S) in both the stretch region 28 and the non-stretch region 26. Therefore, a plurality of cut pieces 18 (unnecessary elastic elastic members 18) of the elastic elastic members 15 and 16 exist in the non-expandable region 26. And when this cutting piece 18 contracts, the through-hole 46 spreads and becomes large. Therefore, there is an advantage that air permeability is improved. 9C has an advantage that the air permeability is better than those in FIGS. 9A and 9B because the through holes 46 are provided uniformly over the entire surface of the non-stretchable region 26. FIG.

<Explanation of terms in the specification>
The following terms in the specification have the following meanings unless otherwise specified in the specification.

“The lower end of the waistline region” refers to a range having a certain distance in the front-rear direction. Specifically, the line segment cc of the point moved 20 mm from the reference line aa ′ to the waist side using the lower end aa ′ (referring to a line segment continuous in the circumferential direction) of the waistline region T as a reference line. “And a line segment bb ′ at a point moved 20 mm to the crotch side from the reference line aa ′. That is, the “lower end portion of the waistline region” has a crotch side edge being a line segment bb ′, a waist side edge being a line segment cc ′, and the line segments bb ′, c− A region continuous in the circumferential direction between c ′. 2 and 7, “the lower end portion of the waistline region” refers to a gray region denoted by reference numeral 45.
More specifically, in the form in which the outer body of the front body and the outer body of the rear body are separated, the length in the front-rear direction of the outer body of the front body is the same as the length in the front-rear direction of the outer body of the rear body The lower end aa ′ of the waistline region T refers to the crotch side edge of the exterior body.
Further, as illustrated in FIG. 2, in the form in which the outer body of the front body and the rear body are separated, the length in the front-rear direction of the outer body of the front body and the length in the front-rear direction of the outer body of the rear body Are different, the lower end aa ′ of the waistline region T refers to the crotch side edge of the exterior body having a shorter length in the front-rear direction. For example, in the form of FIG. 2, since the buttock cover portion 14 is provided in the back body, the exterior body of the back body is longer in the front-rear direction than the exterior body of the front body. Therefore, when the outer body of the front body and the outer body of the rear body are respectively overlapped with the waist side edges aligned and fixed with side seals, the part of the buttock cover portion 14 does not overlap the outer body of the front body. Moreover, it becomes the form which protruded to the crotch side. Therefore, in such a case, the crotch side edge of the outer body of the front body is the lower end aa ′ of the waistline region T, and the lower end aa ′ of the waistline region T of the rear body is the front body exterior body. A line segment that overlaps the crotch edge.
Further, as representatively illustrated in FIG. 7, in the form in which the front and rear exterior bodies are integrated, the lower end aa ′ of the waistline region T is a notch starting point 46 constituting the undercarriage. A line segment continuous in the circumferential direction.

  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%. For example, an expansion rate of 200% is synonymous with an expansion ratio of 2 times.

  -"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%, and ion-exchanged water: 97.09 wt%) To 49.0 g, 1.0 g of a superabsorbent polymer is added and stirred with a stirrer. The produced gel is left in a constant temperature and humidity chamber of 40 ° C. × 60% RH for 3 hours and then returned to room temperature, and the gel strength is measured with a card meter (Curdmeter-MAX ME-500, manufactured by I.techno Engineering).

  ・ "Weight" is measured as follows. After the sample or test piece has been pre-dried, it is left in a test room or apparatus in a standard state (test location is temperature 23 ± 1 ° C., relative humidity 50 ± 2%) to a constant weight. Pre-drying refers to making a sample or test piece constant in an environment at a temperature of 100 ° C. In addition, it is not necessary to perform preliminary drying about the fiber whose official moisture content is 0.0%. Using a test specimen (100 mm × 100 mm) per square meter from a test piece in a constant weight state, a sample having a size of 100 mm × 100 mm is cut out. The weight of the sample is measured, multiplied by 100, and the weight per square meter is calculated and used as the basis weight.

-"Thickness" is automatically measured using an automatic thickness measuring instrument (KES-G5 handy compression measurement program) under the conditions of load: 0.098 N / cm ² and pressure area: 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 state (test location: temperature 23 ± 1 ° C, relative humidity 50 ± 2%). To do.

  -Unless otherwise specified, the dimensions of each part mean dimensions in a deployed state, not a natural length state.

  The present invention can be used for disposable absorbent articles such as the above examples.

A1: Length in the width direction of the non-stretchable region, A1A: Length in the width direction of the non-stretchable region 26A, A1B: Length in the width direction of the non-stretchable region 26B, A2: Length in the width direction of the stretchable region, L ... intermediate region, LO ... leg opening, T ... waist circumference region, U ... waist lower part, W ... waist part, WO ... waist opening, 11 ... liquid impervious sheet, 12 ... exterior body, 12A ... side seal part , 12F ... front side exterior body, 12B ... rear side exterior body, 12H ... inner sheet layer, 12S ... outer sheet layer, 12r ... waist-side folded part, 14 ... buttocks cover part, 18 ... unnecessary elastic elastic member, 20 ... crotch side Folded part, 22 ... cutting trace, 25 ... design sheet, 25f ... folded part, 26 ...
Non-stretchable region, 26A: Non-stretchable region of the exterior body that overlaps with the absorber, 26B: Non-stretchable region of the exterior body that does not overlap with the absorber, 27 ... Pattern printing unit, 28 ... Stretchable region, DESCRIPTION OF SYMBOLS 30 ... Top sheet, 40 ... Intermediate sheet, 45 ... Lower end part of waist area T, 46 ... Through-hole, 50 ... Absorbing element, 56 ... Absorber, 58 ... Packaging sheet, 60 ... Gathering, 62 ... Gather sheet, 200 ... Interior body, H ... Hot melt adhesive

Claims (7)

The exterior body constituting the front body and the exterior body constituting the back body are individually or integrally provided, and the interior body including the absorber is attached from the exterior body constituting the front body to the exterior body constituting the back body. And
The both sides of the exterior body constituting the front body and the both sides of the exterior body constituting the back body are joined, respectively, and a waist opening and a pair of left and right leg openings are formed,
At least one of the outer body constituting the front body and the outer body constituting the rear body has a non-stretchable region provided in at least a part of the range having the absorber, and a range not having the absorber. Having at least a stretchable region provided in part,
The stretchable region is formed of a plurality of elongated sheets attached along the width direction at intervals in the front-rear direction between the inner sheet layer, the outer sheet layer, and the inner sheet layer and the outer sheet layer. An elastic elastic member, and is an area that elastically expands and contracts in the width direction with expansion and contraction of the elastic elastic member,
The non-stretchable region has the inner sheet layer and the outer sheet layer continuous from the stretchable region, and an unnecessary elastic stretchable member remaining between the inner sheet layer and the outer sheet layer, and is elastic in the width direction. It is an area that does not stretch,
In a range that does not have the absorber, the non-stretchable region is provided on the absorber side in the width direction of the exterior body, and the stretchable region is provided on both sides in the width direction of the exterior body. ,
A disposable absorbent article, wherein a through-hole penetrating at least one of the inner sheet layer and the outer sheet layer is provided in at least a part of the non-stretchable region in a range not having the absorber.   The disposable absorbent article according to claim 1, wherein the through hole is a cut trace of the elastic elastic member. The length in the width direction of the non-stretchable region provided in the range having no absorber of the outer package is
The disposable absorbent article according to claim 1, wherein a lower end portion of a waistline region of the exterior body is long and decreases from the lower end portion toward at least one of a waist side and a crotch side of the exterior body. In the lower end of the waist area of the exterior body,
The total length in the width direction of the non-stretchable region in a range not including the absorber of the outer package is 30% to 50% of the total length in the width direction of the range not including the absorber in the outer package. The disposable absorbent article as described. In either one of the exterior body constituting the front body and the exterior body constituting the back body,
The length in the width direction of the non-stretchable region provided in the range that does not have the absorber of the exterior body is:
The lower end portion of the waistline region of the exterior body is long, and gradually decreases from the lower end portion toward the waist side of the exterior body,
In the other exterior body of the exterior body constituting the front body and the exterior body constituting the back body,
The length in the width direction of the non-stretchable region provided in the absorber of the exterior body is:
The disposable absorbent article according to claim 1, wherein a waist side end portion of the absorbent body is long and gradually becomes shorter from the waist side end portion toward the crotch side. At least one of the front exterior body and the rear exterior body is provided with a design sheet that has been designed,
The disposable absorbent article according to claim 1, wherein an area where the design sheet is provided overlaps with an area where the through hole is provided. In the non-stretchable region, the elastic stretchable member is cut into a plurality of pieces,
The cut elastic elastic member is fixed to at least one of the inner sheet layer and the outer sheet layer,
A through hole is provided in the sheet layer to which the cut elastic elastic member is fixed,
The disposable absorbent article according to claim 1, wherein the sheet layer is contracted and the through hole is widened by contraction of the cut elastic elastic member.

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