JP2020043965A - Disposable diaper - Google Patents

Abstract

A disposable diaper that exposes the navel from the disposable diaper to facilitate navel care regardless of the physique of the newborn baby. A rectangular target sheet is provided on both sides of the dorsal part of the side flap part, and a rectangular target sheet to which the fastening tape engages is provided on the opposite side of the ventral part of the exterior sheet, positioned on the ventral part. A stripping portion formed to be stripped from the end flap portion is formed at an intermediate portion in the width direction of the end flap portion, and a bottom line extending in the width direction of the stripping portion in a plan view on the side opposite to the body, and a bottom line. A first cutting line formed in a first waveform extending toward the left as it goes from the left end of the bottom line toward the ventral side, and a second waveform extending toward the right as it goes from the right part of the bottom line toward the ventral side Surrounding with the formed second cutting line, forming the first waveform in at least three or more continuous circular arcs or sinusoidal curves, and forming the second waveform in at least three or more continuous circular arcs or sinusoidal curves formed. [Selection drawing] Fig. 2

Description

  The present invention relates to a disposable diaper, and more particularly to a disposable diaper that can easily perform navel care of a newborn baby by forming a peelable peeling portion on an end wrap located on the ventral side. is there.

  In a conventional disposable diaper, a technique for forming an upper end portion of an end flap located on an abdominal side into an arc shape having a downwardly convex portion for performing navel care of a newborn baby has been known. (Patent Document 1)

JP 2008-525162 A

  However, according to the technique of Patent Document 1, it is difficult to expose the navel from a disposable diaper depending on the physique of the newborn baby, especially when the physique of the newborn baby is small, and there is a possibility that navel care may not be easily performed. there were.

  Therefore, an object of the present invention is to provide a disposable diaper that can easily perform navel care by exposing the navel from a disposable diaper, regardless of the physique of the newborn baby, particularly, even when the physique of the newborn is small. Is to provide.

The present invention that has solved the above problems is as follows.
The first means includes a liquid-permeable topsheet, a liquid-impermeable backsheet, an absorber provided between the topsheet and the backsheet, and an exterior provided on a side opposite to the body of the backsheet. In disposable diapers with sheets,
End flap portions are formed on both sides in the front-rear direction of the absorber, side flap portions are formed on both sides in the width direction of the absorber, and fastening tapes are provided on both sides of the back side portion of the side flap portions. A rectangular target sheet to which the fastening tape is engaged is provided on the body sheet opposite to the abdominal part of the exterior sheet, and the end flap is provided at a widthwise intermediate part of the end flap part located on the abdominal part. Forming a peeling portion formed so as to be peelable from the portion, in plan view on the opposite body side, the peeling portion, a bottom line extending in the width direction, and from the left end of the bottom line toward the abdomen from the left end A first cutting line formed in a first waveform extending toward the left side, and a second cutting line formed in a second waveform extending toward the right side from the right portion of the bottom line toward the abdomen. surrounding , The first waveform is formed in an arc shape or a sinusoidal consecutive at least three, characterized in that said second waveform are formed into an arc shape or a sinusoidal consecutive at least three.

  The second means is characterized in that, in the configuration of the first means, the bottom line is formed more abdominally than an abdominal end of the absorber in the end flap in plan view.

  The third means is characterized in that, in the configuration of the second means, the bottom line is formed more abdominally than the abdominal end of the target sheet in the end flap portion in plan view.

  The fourth means is the device according to any one of the first to third means, wherein the first cutting line and the second cutting line are symmetrical with respect to a center line extending in the front-rear direction at the center in the width direction. It is characterized by being formed in.

  The fifth means, in the configuration of the means according to any one of the first to fourth aspects, forms an intersection angle on the acute angle side of the first cutting line and an imaginary line extending in the width direction at 20 to 40 degrees, The intersection angle between the second cutting line and the imaginary line extending in the width direction on the acute angle side is formed at 20 to 40 degrees.

  The sixth means is characterized in that, in the configuration of the means according to any one of the first to fifth aspects, the bottom line is formed as a cutting line, and the peeling portion is formed so as to be cut.

  A seventh means is the configuration of any one of the first to fifth means, wherein the bottom line is formed as a non-cutting line, the peeling portion is formed so as to be peelable, and a width direction of the target sheet is formed. Both sides of the target sheet are fixed to the exterior sheet, the intermediate portion in the width direction of the target sheet is not fixed to the exterior sheet to form a storage portion, and the peeled portion peeled off from the end flap portion is provided in the storage portion. It is characterized in that it is configured to be inserted.

  According to the first means, end flap portions are formed on both sides in the front-rear direction of the absorber, side flap portions are formed on both sides in the width direction of the absorber, and on both sides of the back side portion of the side flap portions, A fastening tape is provided, and a rectangular target sheet to which the fastening tape is engaged is provided on a side of the exterior sheet opposite to the abdomen, and an end flap is provided at an intermediate portion in the width direction of the end flap portion located on the abdomen. A peeling portion formed so as to be peelable from the portion, and in a plan view on the opposite body side, the peeling portion, the bottom line extending in the width direction, the left side as going from the left end of the bottom line to the ventral side. A first cutting line formed in a first waveform extending toward the first line, and a second cutting line formed in a second waveform extending toward the right side from the right of the bottom line toward the abdomen, At least the first waveform Since three or more continuous arcs or sine curves are formed and the second waveform is formed in at least three or more continuous arcs or sine curves, the newborn physique is particularly irrespective of the newborn physique. Even when the size is small, the navel can be easily exposed by exposing the navel from the disposable diaper. In addition, it is possible to flexibly fit the stomach of the newborn baby and prevent the stomach of the newborn baby from being traumatized.

  According to the second means, in addition to the effect of the first means, since the bottom line is formed on the abdomen rather than the abdominal end of the absorber in the end flap in a plan view, the high absorbency contained in the absorber is provided. It is possible to prevent the polymer particles and the like from being discharged to the outside.

  According to the third means, in addition to the effect of the second means, in bottom view, the bottom line is formed more abdominally than the abdominal end of the target sheet in the end flap portion, so regardless of the body shape of the newborn baby, The navel of the newborn is exposed from the end flap portion so that navel care can be performed more easily.

  According to the fourth means, in addition to the effect of any one of the first to third means, the first cutting line and the second cutting line are moved with respect to a center line extending in the front-rear direction at the center in the width direction. Since the diaper is formed symmetrically, the peeling portion can be easily peeled off along the first cutting line and the second cutting line, and the navel can be exposed from the disposable diaper.

  According to the fifth means, in addition to the effect of the means according to any one of the first to fourth aspects, the first intersection line and the imaginary line extending in the width direction are formed such that the intersection angle on the acute angle side is 20 to 40 degrees. Since the intersection angle between the second cutting line and the imaginary line extending in the width direction on the acute side is formed at 20 to 40 degrees, the stripped portion is more easily peeled along the first cutting line and the second cutting line. Take the navel out of the disposable diaper.

  According to the sixth means, in addition to the effect of any one of the first to fifth means, the bottom line is formed at the cutting line, and the stripped portion is formed so as to be cut. After stripping along the first cutting line and the second cutting line, it can be cut and removed.

  According to the seventh means, in addition to the effect of the means according to any one of the first to fifth aspects, the bottom line is formed as a non-cutting line, the peeling portion is formed so as to be peelable, and the width of the target sheet is formed. Both sides of the target sheet are fixed to the exterior sheet, the middle part in the width direction of the target sheet is not fixed to the exterior sheet to form a storage section, and the stripped section peeled off from the end flap section is inserted into the storage section. With this configuration, it is possible to prevent the dust from being removed and stored in the storage portion of the target sheet after the stripping portion is stripped along the first cutting line and the second cutting line.

It is a top view of the body side in the state where the disposable diaper of a 1st embodiment was developed. It is a top view by the side of the non-body side where the disposable diaper of 1st Embodiment was expanded. It is X1-X1 sectional view taken on the line of FIG. It is an enlarged view of the peeling part of 1st Embodiment. It is explanatory drawing of the state which removed the 1st part of the stripping part. It is explanatory drawing of the state which removed the 1st and 2nd parts of the stripping part. It is explanatory drawing of the state which removed the 1st-3rd part of the same stripping part. It is explanatory drawing of the state which removed the 1st-4th part of the stripping part. FIG. 4 is an enlarged plan view of the first to fourth portions cut away. It is an enlarged view of the peeling part of 2nd Embodiment. It is explanatory drawing of the state which removed the 1st part of the stripping part. It is explanatory drawing of the state which removed the 1st and 2nd parts of the stripping part. It is explanatory drawing of the state which removed the 1st-3rd part of the same stripping part. It is explanatory drawing of the state which removed the 1st-4th part of the stripping part. It is a plane enlarged view which inserted the 1st-4th parts of a stripping part in a storage part. It is an explanatory view of a waveform.

  A disposable diaper that can easily perform navel care for a newborn baby will be described. In this specification, the “front-back direction” refers to a direction connecting the ventral side and the back side, and the “width direction” refers to a direction orthogonal to the front-back direction.

<Disposable diaper of the first embodiment>
As shown in FIGS. 1 to 3, the disposable diaper according to the first embodiment includes a liquid-permeable top sheet 10 provided on the body side and a liquid-impermeable back sheet 11 provided on the opposite body side. It is formed from an absorbent element 20 sandwiched between a top sheet 10 and a back sheet 11. Further, the absorbing element 20 is formed of an absorber 21 and a packaging sheet 22 that wraps the absorber 21.

  An exterior sheet 12 is provided on a side opposite to the body of the back sheet 11. In addition, an intermediate sheet 15 is provided between the top sheet 10 and the absorbing element 20 to move the excrement transmitted through the top sheet 10 to the absorbing element 20 and prevent the excrement from returning.

  On both sides of the absorption element 20 in the width direction, three-dimensional gathers 30 are provided at predetermined intervals to prevent excretion from leaking to the outside. The three-dimensional gather 30 is formed of a gather sheet 31 that is substantially continuous in the width direction, and an elongated elastic elastic member 32 that is fixed in an extended state along the longitudinal direction of the gather sheet 31.

  Outside the base of the three-dimensional gather 30, a flat gather 40 for preventing urine from leaking outside is formed at a predetermined interval. The flat gathers 40 are formed from the back sheet 11, the gather sheet 31, the exterior sheet 12, and the elongated elastic elastic members 41 that are fixed between the back sheet 11 and the gather sheet 31 in an extended state along the front-rear direction. Have been.

  End flap portions EF are formed on both sides in the front-rear direction of the absorbing element 20, and side flap portions SF are formed on both sides in the width direction of the absorbing element 20, respectively. The end flap portion EF is formed from the top sheet 10, the back sheet 11, and the exterior sheet 12, and the absorbing element 20 does not extend. The side flap portion SF is formed from the gather sheet 31 and the exterior sheet 12, and the absorbing element 20 does not extend.

  Fastening tapes 50 are provided on both sides of the back side of the side flap portion SF, respectively. The fastening tape 50 includes a base member 51 fixed to the back side of the side flap SF, and a locking portion 52 provided on the body side surface of the base member 51. At an intermediate portion of the abdominal end flap portion EF, a stripping portion 60 that is removed from the intermediate portion is formed.

  A rectangular target sheet 55 extending in the width direction at a predetermined interval in the front-rear direction in which the locking portion 52 of the fastening tape 50 is locked is provided on the abdomen of the exterior sheet 12 on the opposite side of the body. Is provided.

  As shown in FIG. 4, the stripping portion 60 includes a cutting line (“bottom line” in the claims) 61 that is a bottom line extending in the width direction, and extends from the left end of the cutting line 61 toward the front left side. A cutting line (“first cutting line” in the claims) 62 reaching the front end of the end flap portion EF and a front end of the end flap portion EF extending from the right end of the cutting line 61 to the front right side. A cutting line (“a second cutting line” in the claims) 63 is provided.

  In plan view, the cutting line 61 is preferably formed on the front side of the abdominal end of the target sheet 55. Thus, the navel of the newborn can be exposed from the end flap portion EF regardless of the body shape of the newborn, and navel care can be easily performed. Further, in plan view, the cutting line 61 is preferably formed on the front side of the abdominal end of the absorber 21. Thereby, it is possible to prevent the superabsorbent polymer particles and the like contained in the absorber 21 from spilling out.

  The cutting line 62 is formed into a waveform (a “first waveform” in the claims) 64 consisting of three consecutive convex and concave arcs, and the cutting line 63 is also composed of three consecutive convex and concave arcs. It is formed in a waveform (“second cutting line” in the claims) 65. Thereby, when starting the navel care of a newborn baby or the like, the cutting line 62 and the cutting line 63 are cut over the same length, that is, while counting the convex arc and concave arc of the waveform 64 and the waveform 65. The same number of convex arcs and concave arcs are cut, and the peeling portion 60 covering the navel from the end flap portion EF is peeled away from the body side to expose the navel from the end flap portion EF. Umbilical care can be easily performed. The cutting line 62 and the cutting line 63 are formed symmetrically with respect to a center line A extending in the front-rear direction at the center in the width direction. Note that the waveform 64 and the waveform 65 can also be formed in a sinusoidal shape described later.

  In this specification, a portion where the first convex arc and the first concave arc of the waveform 64 and the waveform 65 are formed in order from the front end on the ventral side of the end flap portion EF is referred to as a first portion S1, A part where the second convex part arc and the second concave part arc continuous with the convex part circular arc and the first concave part circular arc is called a second part S2, and a third part continuous with the second convex part circular arc and the second concave part circular arc. The part where the convex part arc and the third concave part arc are formed is called a third part S3, and the part between the third convex part arc, the third concave part arc and the cutting line 61 is called a fourth part S4.

  In the first embodiment, the first convex portion arc and the first concave portion arc formed in the first portion S1, the second convex portion arc and the second concave portion arc formed in the second portion S2, and the third portion S3 are formed. The third convex portion arc and the third concave portion arc are formed in the same shape, but the first convex portion arc and the first concave portion arc formed in the first portion S1 and the second convex portion arc formed in the second portion S2. The partial arc and the second concave arc can be formed in different shapes from the third convex arc and the third concave arc formed in the third portion S3.

  For example, the second convex portion arc and the second concave portion arc of the second portion S2 are replaced with the first convex portion arc and the first concave portion arc of the first portion S1, and the third convex portion arc and the third concave portion arc of the third portion S3. It can be formed larger. As a result, the waveform 64 and the waveform 65 are cut while relying on the difference in feeling applied to the fingertip at the time of cutting, and the peeling portion 60 covering the navel from the end flap portion EF is easily peeled to the side opposite to the body. be able to.

  The position at which the stripped portion 60 is formed is arbitrary, but is formed at a position defined by a width of 40 to 110 mm around the center line A and a width of 10 to 30 mm from the front end of the ventral end flap EF in the front-rear direction. Then, the length of the joint portion cut at the time of cutting the cutting line forming the cutting line 61, the cutting line 62, and the cutting line 63 is set to 2 to 4 mm, and the non-joining portion between the adjacent joining portions is set to 0. It is preferable that the thickness be 5 to 1.5 mm. Thereby, the tensile strength in the longitudinal direction and the width direction can be maintained at the same level as that of the product in which the peeling portion 60 is not formed on the ventral end flap portion EF.

  In the first embodiment, the intersection angle θ between the imaginary center line 66 connecting the inflection points of the convex arc and the concave arc of the waveform 64 and the imaginary line B extending in the width direction is formed at an acute angle side of 30 degrees. The intersection angle β between the imaginary center line 67 connecting the inflection points of the convex arc and concave arc and the imaginary line B extending in the width direction is 30 degrees. Accordingly, the waveform 64 and the waveform 65 can be easily cut, and the peeling portion 60 covering the navel from the end flap portion EF can be easily peeled away from the body. Further, in order to easily cut the waveform 64 and the waveform 65 and to peel off the stripping portion 60 covering the navel from the end flap portion EF to the opposite side of the body, the intersection angle θ and the intersection angle β are set to 20 to Preferably, it is formed at 40 degrees.

  As shown in FIGS. 5 to 8, when starting the navel care of a newborn baby or the like, the cutting line 62 and the cutting line 63 are cut over a predetermined length, that is, the first portion S1 and the first portion S2. Then, the third portion S3 and the fourth portion S4 are cut in this order, and finally, the cutting line 61 is cut to cut off the stripped portion 60 covering the navel from the end flap portion EF. In addition, the code | symbol C has shown the navel of a newborn baby. Thus, the navel can be exposed from the end flap portion EF, and the navel care can be more easily performed. In the first embodiment, the upper part of the navel is exposed with the first part S1 and the second part S2 cut, and the first part S1, the second part S2, and the third part S3 are cut. The navel can be completely exposed.

  As shown in FIG. 9, traces of the stripped portion 60 at the intermediate portion of the end flap portion EF have traces 68 and 69 formed of concave and convex arcs. Thus, the middle portion of the end flap portion EF after the peeling portion 60 has been cut can be fitted to the stomach of the newborn baby flexibly, and can prevent the stomach of the newborn baby from being traumatized.

<Second embodiment>
Next, a disposable diaper according to a second embodiment will be described. In addition, about the same member, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 10, the stripped portion 60A includes a non-cutting line (“bottom line” in the claims) 61A, which is a bottom line extending in the width direction, and extends from the left end of the non-cutting line 61A toward the front left side. And a cutting line 63 extending from the right end of the non-cutting line 61A to the front right and extending to the front end of the end flap EF. I have. Thereby, the stripping portion 60A can be connected to the end flap portion EF by the non-cutting line 61A, and the stripping portion 60A can be prevented from becoming dust.

  In plan view, the non-cutting line 61A is preferably formed on the front side of the abdominal end of the target sheet 55. This allows the navel of the newborn to be exposed from the end flap portion EF regardless of the body shape of the newborn, thereby making it easier to perform navel care. Further, in plan view, the non-cutting line 61A is preferably formed on the front side of the abdominal end of the absorber 21. Thereby, it is possible to prevent the superabsorbent polymer particles and the like contained in the absorber 21 from spilling out.

  In the present specification, a portion where the first convex arc and the first concave arc of the waveform 64 and the waveform 65 are formed in order from the front end of the end flap portion EF is referred to as a first portion S1, and the first convex arc. And a portion where the second convex portion arc and the second concave portion arc which are continuous with the first concave portion arc are referred to as a second portion S2, and the third convex portion arc which is continuous with the second convex portion arc and the second concave portion arc. The region where the third concave arc is formed is referred to as a third region S3, and the region between the third convex arc, the third concave arc and the non-cutting line 61A is referred to as a fourth region S4.

  The positions at which the non-cutting line 61A, the cutting line 62, and the cutting line 63 are formed are arbitrary, but the width is 40 to 110 mm around the center line A, and the front-rear direction from the front end of the abdominal end flap portion EF. It is formed in a section defined by 10 to 30 mm, the length of the joint portion cut when cutting the cut line forming the waveform 64 and the waveform 65 is 2 to 4 mm, and the non-joint portion between the adjacent joint portions is It is preferably 0.5 to 1.5 mm. Thereby, the tensile strength in the longitudinal direction and the width direction can be maintained at the same level as that of a product in which the stripped portion 60A is not formed on the abdominal end flap portion EF.

  As shown in FIGS. 11 to 14, when starting the navel care of a newborn baby or the like, the cutting line 62 and the cutting line 63 are cut along a predetermined length, that is, the first portion S1 and the first portion S2. Then, the third part S3 and the fourth part S4 are cut in this order, and the peeling part 60A covering the navel from the end flap part EF is peeled away from the body. Thus, the navel can be exposed from the end flap portion EF, and the navel care can be more easily performed.

  As shown in FIG. 15, the body side surface of the target sheet 55 </ b> A is fixed to the opposite body side surface of the exterior sheet 12 via an adhesive portion 56 such as a hot melt adhesive applied to both sides in a substantially U-shape. . On the other hand, the body side of the target sheet 55 to which the hot-melt adhesive or the like is not applied is not fixed to the opposite body side of the exterior sheet 12, and is located between the body side of the target sheet 55 and the opposite body side of the exterior sheet 12. Is formed with a storage portion 57.

The stripped portion 60A that has been stripped to the opposite side of the body can be inserted into the storage portion 57 formed between the opposite side of the exterior sheet 12 and the side of the body of the target sheet 55A. This prevents the peeling portion 60A from covering the side opposite to the body of the target sheet 55A, and the fastening tape 50 can be locked at an arbitrary position on the body side of the target sheet 55A. Further, the cutting line 62 having the waveform 64 formed therein and the cutting line 63 having the waveform 65 formed therein are efficiently engaged with the bonding portion 56 of the storage portion 57. Thereby, the stripping part 60A inserted into the storage part 57 can be reliably held in the storage part 57.
Wear.

  Next, the form of the waveform 64 and the waveform 65 will be described. The waveform 64 and the waveform 65 can be formed in a sinusoidal shape shown in FIG. 16A and an arc shape shown in FIG. 16B. The sinusoidal shape and the arcuate shape can be formed in any shapes, but the amplitude 71 around the virtual center line 66 or 67 is formed at 3 to 10 mm, and the wavelength 72 is set at 10 It is preferable to form it in a thickness of up to 20 mm.

Next, materials and characteristic portions of the top sheet 10 and the like will be described in order.
(Top sheet)
The top sheet 10 is formed of a perforated or non-perforated nonwoven fabric, a porous plastic sheet, or the like. In addition, the non-woven fabric is not particularly limited in its raw material fiber. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, regenerated fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of these. And the like. Further, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods, for example, a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, a point bond method, and the like. For example, a spun lace method is preferred for flexibility and drapability, and a thermal bonding method is a preferred processing method for bulkiness and softness.

(Back sheet)
The back sheet 11 is made of an olefin-based resin such as polyethylene or polypropylene, a laminated non-woven fabric obtained by laminating a non-woven fabric on a polyethylene sheet or the like, or a non-woven fabric that has substantially secured liquid impermeability by interposing a waterproof film (in this case, a waterproof film And the nonwoven fabric constitute a backsheet.). Of course, in addition to this, a liquid-impermeable and moisture-permeable material which has been used in recent years from the viewpoint of preventing stuffiness can be exemplified. As a sheet of a material having this liquid impermeability and moisture permeability, for example, an inorganic filler is kneaded in an olefin resin such as polyethylene or polypropylene, and after forming the sheet, it is stretched in a uniaxial or biaxial direction. Can be exemplified. In addition, non-woven fabric using micro denier fiber, waterproofing is enhanced by applying leaking heat or pressure to enhance the leakproofing by reducing the voids in the fiber, applying a highly water-absorbing resin or hydrophobic resin or a water repellent. A liquid-impermeable sheet without using a film can also be used as the back sheet 11.

(Exterior sheet)
The exterior sheet 12 is a part for supporting the absorbing element 20 and attaching to the wearer. The exterior sheet 12 is formed in an hourglass shape in which the central portions in the front-rear direction on both sides are constricted, and this is a portion surrounding the wearer's leg.

The exterior sheet 12 is preferably formed of a nonwoven fabric, but is not limited to this. The type of the nonwoven fabric is not particularly limited. As the material fiber, for example, in addition to synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides, regenerated fibers such as rayon and 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 spunbonded nonwoven fabric, an SMS nonwoven fabric, and an SMMS nonwoven fabric is preferable from the viewpoint that both touch and strength can be achieved. The nonwoven fabric may be used alone or in a plural number. In the latter case, it is preferable to bond the nonwoven fabrics together with a hot melt adhesive or the like. When a non-woven fabric is used, the basis weight of the fiber is preferably 10 to 50 g / m ² , particularly preferably 15 to 30 g / m ² .

(Intermediate sheet)
The intermediate sheet 15 is formed of the same material as the top sheet 10. The intermediate sheet 15 is preferably bonded to the top sheet 10, and when heat embossing or ultrasonic welding is used for the bonding, the material of the intermediate sheet 15 preferably has a melting point similar to that of the top sheet 10. When a nonwoven fabric is used for the intermediate sheet 15, the fineness of the fibers of the nonwoven fabric is preferably about 2.0 to 5.0 dtex.

(Absorber)
The absorber 21 can be formed by an aggregate of fibers. Examples of the fiber aggregate include a filament aggregate obtained by spreading a tow (fiber bundle) of synthetic fibers such as cellulose acetate, as necessary, in addition to fibers obtained by stacking short fibers such as cotton-like pulp and synthetic fibers. Can also be used. The basis weight of fibers, when fiber stacking flocculent pulp or short fibers, for example, be a 100 to 300 g / m ² approximately, in the case of a filament aggregate, for example, be 30 to 120 g / m ² approximately Can be. The fineness of the synthetic fiber is, for example, 1 to 16 dtex, preferably 1 to 10 dtex, and more preferably 1 to 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 pieces, preferably about 10 to 50 pieces, more preferably about 15 to 50 pieces per inch. In addition, crimped fibers that are uniformly crimped are often used.

  The absorbent body 21 preferably contains superabsorbent polymer particles, and 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 the SAP particles are not present in the upper, lower, and intermediate portions of the absorber 21 or are very little, if any, it cannot be said that the SAP particles are dispersed throughout the thickness direction. Therefore, "dispersed throughout the thickness direction" means, for the aggregate of fibers, in addition to the form that is "uniformly" dispersed throughout the thickness direction, "distributed unevenly in the upper, lower and / or middle portions" But also includes forms that are still dispersed in the upper, lower, and middle portions. In addition, a form in which some SAP particles do not enter the aggregate of fibers and remain on the surface thereof, and a form in which some SAP particles pass through the aggregate of fibers and are on the packaging sheet 22 are also excluded. Not something.

  The superabsorbent polymer particles include “powder” in addition to “particles”. As the particle size of the superabsorbent polymer particles, those used for this type of absorbent article can be used as they are, and the particle size is preferably 1000 μm or less, particularly preferably 150 to 400 μm. 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 preferred. Examples of the superabsorbent polymer particles include starch-based, cellulose-based and synthetic polymer-based particles, such as starch-acrylic acid (salt) graft copolymer, saponified starch-acrylonitrile copolymer, and sodium carboxymethyl cellulose. Or an acrylic acid (salt) polymer can be used. The shape of the superabsorbent polymer particles is preferably in the form of a commonly used powder, 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 suitably used. If the water absorption speed is too slow, a so-called reverse flow in which the liquid supplied into the absorber 21 returns to the outside of the absorber 21 is likely to occur.

The basis weight of the superabsorbent polymer particles can be appropriately determined according to the absorption amount required for the use of the absorber 21. Therefore, although it cannot be said unconditionally, it can be 50 to 350 g / m ² . When the basis weight of the polymer is less than 50 g / m ^2, it is difficult to secure the absorption amount. If it exceeds 350 g / m ² , not only the effect is saturated, but also an excessive amount of the superabsorbent polymer particles gives a jarring and uncomfortable feeling.

(Packaging sheet)
The packaging sheet 22 is formed of tissue paper, particularly crepe paper, nonwoven fabric, polylaminated nonwoven fabric, a sheet with small holes, or the like. However, a sheet from which the superabsorbent polymer particles do not escape is desirable. When a nonwoven fabric is used instead of crepe paper, hydrophilic SMMS (spunbond / meltblown / meltblown / spunbond) nonwoven fabric is particularly suitable, and polypropylene, polyethylene / polypropylene, or the like can be used as the material. The fiber basis weight is preferably 5 to 40 g / m ² , particularly preferably 10 to 30 g / m ² .

(Three-dimensional gather)
As the gather sheet 31 of the three-dimensional gather 30, a water-repellent nonwoven fabric can be used, and as the elastic elastic member 32, thread rubber or the like can be used. A plurality of elastic elastic members can be provided, and one elastic elastic member can be provided.

  The opposite body side surface of the gather sheet 31 has a widthwise fixing start end on a side portion of the top sheet 10, and a portion outward in the width direction from the fixing start end is located on the side portion of the backsheet 11 and the widthwise outside thereof. Is fixed to a side portion of the exterior sheet 12 to be formed using a hot melt adhesive or the like.

  Around the legs, the widthwise inner side from the fixing start end of the three-dimensional gather 30 is fixed on the top sheet 10 at both ends in the front-rear direction of the product, but the portion between them is a non-fixed free portion. The elastic member 32 stands up due to the contraction force of the elastic member 32. At the time of wearing the diaper, the diaper is attached to the body in a boat shape, and the contracting force of the elastic elastic member 32 acts, so that the three-dimensional gathers 30 stand up by the contracting force of the elastic elastic member 32 and closely adhere around the legs. . As a result, so-called lateral leakage from around the legs is prevented.

(Plane gather)
A leg elastic elastic member 41 made of thread rubber or the like is fixed between the gather sheet 31 and the back sheet 11 so as to extend in the front-rear direction. A plurality of leg elastic elastic members 41 may be provided, or one leg elastic elastic member may be provided.

(Fastening tape)
The base of the base material 51 of the fastening tape 50 is fixed between the gather sheet 31 and the exterior sheet 12 by a hot melt adhesive or the like. Further, the base material 51 is formed of a nonwoven fabric, a plastic film, a polylaminate nonwoven fabric, paper, or a composite material thereof.

  The locking portion 52 is formed from a hook material of a mechanical fastener. The hook member has a number of engaging projections on the outer surface side. The shapes of the engagement projections are (A) L-shaped, (B) J-shaped, (C) mushroom-shaped, (D) T-shaped, (E) double J-shaped (the J-shaped Etc.), but any shape may be used. Of course, an adhesive layer may be provided as a locking portion of the fastening tape 50.

(Target sheet)
The target sheet 55 is formed of a plastic film or a nonwoven fabric having a large number of loop yarns provided on the surface.

<Description of terms in the specification>
When the following terms are used in the specification, they have the following meanings unless otherwise specified in the specification.

-The "front-back (vertical) direction" means the direction connecting the ventral side (front side) and the back side (rear side), and the "width direction" means the direction orthogonal to the front-rear direction (left-right direction).
-"Front side" means closer to the wearer's skin, and "Back side" means farther from the wearer's skin. "Front surface" means the surface of the member closer to the wearer's skin, and "back surface" means the surface farther from the wearer's skin.
"MD direction" and "CD direction" mean the flow direction (MD direction) and the transverse direction (CD direction) perpendicular to the flow direction in the manufacturing equipment, and one of them is the front-back direction of the product. The other is in the width direction of the product. The MD direction of the nonwoven fabric is the direction of the fiber orientation of the nonwoven fabric. The fiber orientation is a direction along which the fibers of the non-woven fabric are along. For example, the fiber orientation is determined from a measurement method according to the fiber orientation test method based on the zero-distance tensile strength of TAPPI Standard Method T471, or from the tensile strength ratio in the front-rear direction and the width direction. The determination can be made by a simple measurement method for determining the orientation direction.
-"Deployment" means a state in which it is flattened without shrinkage or loosening.
-"Elongation rate" means the value when the natural length is 100%. For example, an elongation ratio of 200% is synonymous with an elongation ratio of twice.
"Gel strength" is measured as follows. 1.0 g of superabsorbent polymer is added to 49.0 g of artificial urine, and the mixture is stirred with a stirrer. The resulting gel is left in a constant temperature / humidity bath at 40 ° C. × 60% RH for 3 hours, then returned to room temperature, and the gel strength is measured with a card meter (Curdmeter-MAX ME-500, manufactured by I. techno Engineering).
-"Artificial urine" is composed of 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. 0.09 wt%, and used at a temperature of 40 ° C unless otherwise specified.
・ "Eye weight" is measured as follows. After pre-drying the sample or test piece, the sample or test piece is left in a test room or apparatus in a standard state (the test place is at a temperature of 23 ± 1 ° C. and a relative humidity of 50 ± 2%) to make it a constant weight state. Predrying refers to making a sample or a test piece a constant weight in an environment at a temperature of 100 ° C. Preliminary drying may not be performed for fibers having an official moisture content of 0.0%. A sample having a size of 100 mm × 100 mm is cut out from the test piece in a constant weight state using a template for sampling (100 mm × 100 mm). The weight of the sample is measured, multiplied by 100 to calculate the weight per square meter, and used as the basis weight.
- "thickness" is used automatic thickness measuring instrument (KES-G5 Handy Compression Tester), load: 0.098 N / cm ^2, and the pressure area: automatically measured under the conditions of 2 cm ^2.
-"Water absorption" is measured by JIS K7223-1996 "Testing method for water absorption of superabsorbent resin".
"Water absorption rate" is "time to end point" when JIS K7224-1996 "Test method for water absorption rate of super water absorbent resin" was performed using 2 g of super absorbent polymer and 50 g of physiological saline. And
-If there is no description about the environmental conditions in the test or measurement, the test or measurement shall be performed in a test room or equipment under standard conditions (the test location is 23 ± 1 ° C and 50 ± 2% relative humidity). I do.
-Unless otherwise specified, the dimensions of each part mean dimensions in the expanded state, not the natural length state.

  The present invention can be used for absorbent articles such as disposable diapers.

REFERENCE SIGNS LIST 10 top sheet 11 back sheet 12 exterior sheet 21 absorber 50 fastening tape 55 target sheet 55A target sheet 56 bonding section 57 storage section 60 peeling section 60A peeling section 61 cutting line (bottom line)
61A Non-cut line (bottom line)
62 Cutting line (1st cutting line)
63 Cutting line (second cutting line)
64 waveforms (first waveform)
65 waveforms (second waveform)
A center line B virtual line EF end flap portion SF side flap portion θ intersection angle β intersection angle

Claims (7)

Disposable comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, an absorber provided between the top sheet and the back sheet, and an exterior sheet provided on the opposite side of the back sheet from the body. In diapers,
Form end flap portions on both sides in the front-rear direction of the absorber,
Form side flap portions on both sides in the width direction of the absorber,
Fastening tape is provided on both sides of the back side of the side flap portion,
On the opposite body side of the abdomen of the exterior sheet, a rectangular target sheet is provided with which the fastening tape is engaged,
Forming a peeling portion formed so as to be peelable from the end flap portion, in the widthwise intermediate portion of the end flap portion located on the abdominal side,
In a plan view on the opposite side of the body, the stripped portion is formed with a bottom line extending in the width direction and a first waveform formed to extend leftward from the left end of the bottom line toward the abdomen. A cutting line and a second cutting line formed in a second waveform extending toward the right side from the right part of the bottom line toward the ventral side,
A disposable diaper wherein the first waveform is formed in at least three or more continuous arcs or sinusoids, and the second waveform is formed in at least three or more continuous arcs or sinusoids. .   The disposable diaper according to claim 1, wherein the bottom line is formed more abdominally than an abdominal end of the absorber in the end flap in a plan view.   The disposable diaper according to claim 2, wherein the bottom line is formed more abdominally than an abdominal end of the target sheet in the end flap portion in a plan view.   The disposable diaper according to any one of claims 1 to 3, wherein the first cutting line and the second cutting line are formed symmetrically with respect to a center line extending in the front-rear direction at the center in the width direction.   The intersection angle between the first cutting line and the imaginary line extending in the width direction is formed at an angle of 20 to 40 degrees, and the intersection angle of the second cutting line and the imaginary line extending in the width direction is defined as the acute angle. The disposable diaper according to any one of claims 1 to 4, which is formed at 20 to 40 degrees.   The disposable diaper according to any one of claims 1 to 5, wherein the bottom line is formed at a cutting line, and the peeling portion is formed so as to be cut. The bottom line is formed as a non-cutting line, and the peeling portion is formed so as to be peelable,
Both sides in the width direction of the target sheet are fixed to an exterior sheet, and a storage part is formed by fixing an intermediate portion in the width direction of the target sheet to the exterior sheet,
The disposable diaper according to any one of claims 1 to 5, wherein a peeled portion peeled from the end flap portion is inserted into the storage portion.

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