JP7152896B2 - disposable diaper - Google Patents

Description

TECHNICAL FIELD The present invention relates to a disposable diaper, and more particularly to a disposable diaper that has an end flap located on the ventral side to form a tear-off portion that can be peeled off, thereby facilitating umbilical care of a newborn baby. be.

In conventional disposable diapers, a technique is known in which the upper end portion of an end flap located on the ventral side is formed in an arc shape having a downward convex portion in order to care for the umbilicus of a newborn baby. (Patent document 1)

Japanese Patent Publication No. 2008-525162

However, with the technique of Patent Document 1, depending on the physique of the newborn, especially when the physique of the newborn is small, it may be difficult to expose the umbilical cord from the disposable diaper, making it difficult to care for the umbilical cord. there were.

Therefore, an object of the present invention is to provide a disposable diaper that can expose the navel from the disposable diaper and facilitate navel care regardless of the size of the newborn, particularly even if the size of the newborn is small. is to provide

The present invention, which has solved the above problems, is as follows.
The first means comprises a liquid-permeable top sheet, a liquid-impermeable back sheet, an absorbent body provided between the top sheet and the back sheet, and an exterior provided on the side opposite to the body of the back sheet. In a disposable diaper with a sheet,
End flap portions are formed on both sides in the front-rear direction of the absorbent body, side flap portions are formed on both sides in the width direction of the absorbent body, and fastening tapes are provided on both sides of the dorsal portion of the side flap portions. A rectangular target sheet to which the fastening tape engages is provided on the side opposite to the body of the ventral portion of the outer sheet, and the end flap is provided at an intermediate portion in the width direction of the end flap portion located on the ventral portion. A stripping portion is formed that can be stripped from the part, and in a plan view on the side opposite to the body, the outer peripheral portion of the stripping portion is a non-cutting line extending in the width direction and a left side of the non-cutting line. The target is formed by a first cutting line extending toward the left side as it goes from the part to the ventral side and a second cutting line that extends toward the right side as it goes from the right part of the non-cutting line to the ventral side. Both sides in the width direction of the sheet are fixed to the exterior sheet, and 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 target sheet is peeled off from the end flap portion toward the opposite side of the body . The scraping part is configured to be inserted into the storage part ,
The non-cutting line is provided between the ventral end of the target sheet and the ventral end of the absorber in plan view on the side opposite to the body .

The second means is, in the configuration of the first means, forming an intersection angle of an acute angle side of the first cutting line and the imaginary line extending in the front-rear direction to 30 to 70 degrees, It is characterized in that the extending imaginary lines are formed to have an intersection angle of 30 to 70 degrees on the acute angle side.

A third means is, in the configuration of the first or second means, to form a sinusoidal or arcuate wavy portion on the first cutting line and to form a sinusoidal or arcuate wavy portion on the second cutting line. It is characterized by

According to the first means, end flap portions are formed on both sides in the front-rear direction of the absorbent body, side flap portions are formed on both sides in the width direction of the absorbent body, and both sides of the dorsal portion of the side flap portions, A fastening tape is provided, a rectangular target sheet to which the fastening tape is engaged is provided on the opposite side of the ventral portion of the exterior sheet, and an end flap is provided in the middle portion in the width direction of the end flap portion located on the ventral portion. In a plan view on the side opposite to the body, the outer peripheral portion of the stripping portion includes a non-cutting line extending in the width direction and a left portion of the non-cutting line. The width direction of the target sheet is formed by a first cutting line extending leftward toward the ventral side and a second cutting line extending rightward toward the ventral side from the right portion of the non-cutting line. Both sides of the target sheet are fixed to the outer sheet, and the intermediate part in the width direction of the target sheet is not fixed to the outer sheet to form a storage part, and the stripped part that is stripped from the end flap part toward the opposite side of the body is Since the non-cutting line is provided between the ventral end of the target sheet and the ventral end of the absorber in plan view on the side opposite to the body, the absorber can be inserted into the storage section regardless of the physique of the newborn. In particular, even if the newborn baby has a small physique, the umbilical cord can be exposed from the disposable diaper to facilitate umbilical care. In addition, regardless of the body shape of the newborn, the navel of the newborn can be exposed from the end flap portion EF to facilitate navel care. Moreover, it is possible to prevent superabsorbent polymer particles and the like contained in the absorbent body 21 from being discharged to the outside.

According to the second means, in addition to the effect of the first means, the angle of intersection of the first cutting line and the imaginary line extending in the front-rear direction on the acute side is formed at 30 to 70 degrees, and the second cutting line and the front-rear direction are formed. Since the intersection angle of the acute side of the imaginary lines extending in the direction is formed at 30 to 70 degrees, regardless of the physique of the newborn, the navel can be exposed from the disposable diaper to facilitate navel care. can.

According to the third means, in addition to the effects of the first or second means, a sinusoidal or arcuate wavy portion is formed on the first cutting line, and a sinusoidal or arcuate wavy portion is formed on the second cutting line. Therefore, wavy portions are formed on both sides of the intermediate portion of the end flap portion where the stripping portion is stripped off, so that it fits flexibly to the abdomen of the newborn and prevents trauma to the abdomen of the newborn. can be prevented.

Fig. 2 is a plan view of the body side of the disposable diaper of the first embodiment in an unfolded state; Fig. 2 is a plan view of the unfolded disposable diaper of the first embodiment on the side opposite to the body; 2 is a cross-sectional view taken along the line X1-X1 of FIG. 1; FIG. FIG. 4 is a plan view of the side opposite to the body where the stripped part stripped along the cutting line is inserted into the storage part. FIG. 5 is an explanatory view enlarging the storage portion of FIG. 4; It is a top view of the opposite body side of the disposable diaper of 2nd Embodiment in the unfolded state. FIG. 4 is a plan view of the side opposite to the body where the stripped part stripped along the cutting line is inserted into the storage part. FIG. 11 is a plan view of the side opposite to the body when the disposable diaper of the third embodiment is unfolded. FIG. 4 is a plan view of the side opposite to the body where the stripped part stripped along the cutting line is inserted into the storage part. FIG. 12 is a plan view of the unfolded disposable diaper of the fourth embodiment on the side opposite to the body; FIG. 4 is a plan view of the side opposite to the body where the stripped part stripped along the cutting line is inserted into the storage part. FIG. 4 is an explanatory diagram of a wavy portion;

A disposable diaper that facilitates umbilical care of a newborn baby will be described. In this specification, the term "front-back direction" refers to the direction connecting the ventral side and the back side, and the term "width direction" refers to the direction perpendicular to the front-back direction.

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

An exterior sheet 12 is provided on the side of the back sheet 11 opposite to the body. Moreover, it is preferable to provide an intermediate sheet 15 between the top sheet 10 and the absorbent element 20 to transfer the excrement permeated through the top sheet 10 to the absorbent element 20 and prevent the excrement from returning.

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

Plane gathers 40 are formed outside the base of the three-dimensional gathers 30 at predetermined intervals to prevent leakage of urination to the outside. The flat gathers 40 are formed from the back sheet 1, the gathers sheet 31, the exterior sheet 12, and an elongated elastic stretchable member 41 fixed in the longitudinal direction between the backseat 1 and the gathers sheet 31 in a stretched state. It is

End flap portions EF are formed on both sides of the absorbent element 20 in the front-rear direction, and side flap portions SF are formed on both sides of the absorbent element 20 in the width direction. The end flap portion EF is formed from the topsheet 10, the backsheet 11 and the outer sheet 12, without the absorbent element 20 extending. Also, the side flap portion SF is formed from the gather sheet 31 and the exterior sheet 12, and the absorbent element 20 does not extend.

A stripping portion 60 that is stripped from the intermediate portion is formed in the intermediate portion of the ventral portion of the end flap portion EF. As shown in FIG. 2, which is a plan view of the opposite side of the body, the stripping portion 60 includes a non-cutting line 61 extending in the width direction, and a left end portion of the non-cutting line 61 extending toward the front left side. A cutting line (“first cutting line” in the claims) 62 reaching the front end portion of the end flap portion EF, and a non-cutting line 61 extending from the right end portion toward the front right side to the front end portion of the end flap portion EF. It is surrounded by a cutting line (“second cutting line” in the claims) 63 . The cutting lines 62 and 63 are formed symmetrically with respect to a center line A extending in the front-rear direction at the center in the width direction.

Fastening tapes 50 are provided on both sides of the dorsal portion of the side flap portion SF. The fastening tape 50 is composed of a base material 51 fixed to the dorsal portion of the side flap SF and locking portions 52 provided on the body side surface of the base material 51 .

A rectangular target sheet 55 extending in the width direction with a predetermined interval in the front-rear direction at which the engaging portion 52 of the fastening tape 50 is engaged is provided on the dorsal portion of the exterior sheet 12 on the side opposite to the body. is provided. The body side of the target sheet 55 is fixed to the opposite body side of the exterior sheet 12 via adhesive portions 56 such as 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 side of the exterior sheet 12 opposite to the body, and the body side of the target sheet 55 and the side of the exterior sheet 12 opposite to the body are not fixed. A storage portion 57 is formed in the .

As shown in FIGS. 4 and 5, when starting umbilical care of a newborn baby, the cut portions 62 and 63 are cut over a predetermined length, and the umbilicus is covered from the end flap portion EF. The stripping portion 60 is stripped away from the body. Thereby, the navel is exposed from the end flap part EF, and navel care can be performed easily. In addition, the code|symbol C has shown the navel of a newborn baby.

The stripped part 60 stripped away from the body can be inserted into a storage part 57 formed between the side of the outer sheet 12 opposite to the body and the side of the target sheet 55 . This prevents the stripping portion 60 from covering the side of the target sheet 55 opposite to the body, and the fastening tape 50 can be locked at an arbitrary position on the side of the target sheet 55 . The stripped portion 60 is valley-folded along a line extending in the width direction at the vertical center of the stripped portion 60, and the stripped portion 60 formed by the valley fold is inserted inside the top sheet 10. You can also

The stripping portion 60 is connected to the end flap portion EF by a non-cutting line 61 . As a result, it is possible to prevent the scraping portion 60 from becoming dust.

The position where the non-cutting line 61 surrounding the stripped portion 60 is formed is not particularly limited, but is preferably formed at a position overlapping the target sheet 55 in plan view. As a result, regardless of the body shape of the newborn, the navel of the newborn can be exposed from the end flap portion EF, and umbilical care can be performed more easily.

Moreover, it is preferable that the non-cutting line 61 is formed on the front side of the abdominal end of the absorbent body 21 . As a result, the superabsorbent polymer particles and the like contained in the absorbent body 21 can be prevented from spilling out.

The intersection angle θ on the acute side of the cutting line 62 surrounding the stripped portion 60 and the imaginary line extending in the front-rear direction, and the acute angle between the cutting line 63 surrounding the stripped portion 60 and the imaginary line extending in the front-rear direction. Although there is no particular limitation on the crossing angle θ of the sides, it is preferable to form it in the range of 30 to 70 degrees. If the angle is less than 30 degrees, it may be difficult to expose the navel of the newborn from the end flap portion EF. It may not be possible to store it inside easily.

<Disposable diaper of the second embodiment>
Next, the disposable diaper of 2nd Embodiment is demonstrated. In addition, about the same member as the disposable diaper of 1st Embodiment, the same code|symbol is attached|subjected and description is abbreviate|omitted.

As shown in FIG. 6, a stripping portion 60A that is stripped from the intermediate portion is formed in the intermediate portion of the ventral portion of the end flap portion EF of the disposable diaper of the second embodiment. The stripped portion 60A includes a non-cutting line 61 extending in the width direction, and a cutting line 62 extending from the left end of the non-cutting line 61 toward the front left to reach the front end of the end flap portion EF. ) A, and a cutting line extending from the right end of the non-cutting line 61 toward the front right to the front end of the end flap portion EF (the "second cutting line" in the claims) Surrounded by 63A.

The cutting line 62A and the cutting line 63A are formed symmetrically with respect to the center line A extending in the front-rear direction at the center in the width direction. The angle of intersection of the cutting line 62A and the imaginary line B extending in the front-rear direction on the acute side is 60 degrees, and the intersection angle of the sharp side between the cutting line 63A and the imaginary line B extending in the front-rear direction is 60 degrees. is formed in

As shown in FIG. 7, when starting umbilical care of a newborn baby, the cut portion 62A and the cut portion 63A are cut over a predetermined length to cover the navel from the end flap portion EF. The stripped portion 60A is stripped away from the body. Thereby, the umbilical cord is exposed from the end flap portion EF, and umbilical care can be performed more easily.

The stripped part 60</b>A that is stripped away from the body can be inserted into a storage part 57 formed between the side of the exterior sheet 12 opposite to the body and the side of the target sheet 55 . This prevents the peeling part 60A from covering the side of the target sheet 55 opposite to the body, and the fastening tape 50 can be locked at an arbitrary position on the side of the target sheet 55 facing the body. In addition, since the cutting lines 62A and 63A of the stripping portion 60A inserted into the storage portion 57 extend in the width direction, they can be more efficiently engaged with the adhesion portion 66 of the storage portion 57. FIG. As a result, the stripping portion 60A inserted into the storage portion 57 can be reliably inserted and maintained by the storage portion 57. As shown in FIG.

<Disposable diaper of the third embodiment>
Next, the disposable diaper of 3rd Embodiment is demonstrated. In addition, about the same member as the disposable diaper of 1st Embodiment, the same code|symbol is attached|subjected and description is abbreviate|omitted.

As shown in FIG. 8, a stripping portion 60B to be stripped from the intermediate portion is formed in the intermediate portion of the ventral portion of the end flap portion EF of the disposable diaper of the third embodiment. The stripped portion 60B is formed with a non-cutting line 61 extending in the width direction and a wavy portion 70B extending from the left end of the non-cutting line 61 toward the front left and reaching the front end of the end flap portion EF. A cutting line (“first cutting line” in the claims) 62B and a wavy portion 70B extending from the right end of the non-cutting line 61 toward the front right to reach the front end of the end flap portion EF are formed. It is surrounded by a cutting line (“second cutting line” in the claims) 63B.

The cutting line 62B and the cutting line 63B are formed symmetrically with respect to the center line A extending in the front-rear direction at the center in the width direction. An imaginary center line D connecting the points of inflection of the convex arc forming the wavy portion 70B of the cutting line 62B and the inflection point of the concave arc and the imaginary line B extending in the front-rear direction form an acute-angle intersection angle of 45 degrees. An imaginary center line E connecting the inflection points of the convex and concave arcs forming the wavy portion 70B of the cutting line 63B and the imaginary line B extending in the front-rear direction intersect at an acute angle of 45 degrees. there is

As shown in FIG. 9, when starting umbilical care of a newborn baby, the cut portion 62B and the cut portion 63B are cut over a predetermined length to cover the navel from the end flap portion EF. The stripped portion 60B is stripped away from the body. Thereby, the umbilical cord is exposed from the end flap portion EF, and umbilical care can be performed more easily. Further, both side portions 65B at the intermediate portion of the end flap portion EF from which the stripped portion 60B has been stripped are formed in a wavy shape. As a result, both side portions 65B at the intermediate portion of the end flap portion EF from which the stripped portion 60B has been stripped can be flexibly fitted to the abdomen of the newborn and prevent trauma to the abdomen of the newborn.

The stripped portion 60B that has been stripped away from the body can be inserted into a storage section 57 formed between the side of the exterior sheet 12 opposite to the body and the side of the target sheet 55 opposite to the body. This prevents the stripping portion 60B from covering the side of the target sheet 55 opposite to the body, so that the fastening tape 50 can be locked at an arbitrary position on the side of the target sheet 55 opposite to the body. Further, the cutting line 62B and the cutting line 63B formed with the wavy portion 70B of the stripping portion 60B inserted into the storage portion 57 are efficiently engaged with the storage portion 57 via the adhesion portion 66 of the storage portion 57. FIG. As a result, the stripping portion 60B inserted into the storage portion 57 can be reliably inserted into the storage portion 57 and maintained.

<Disposable diaper of the fourth embodiment>
Next, the disposable diaper of 4th Embodiment is demonstrated. In addition, about the same member as the disposable diaper of 1st Embodiment, the same code|symbol is attached|subjected and description is abbreviate|omitted.

As shown in FIG. 10, a stripping portion 60C that is stripped from the intermediate portion is formed in the intermediate portion of the abdominal portion of the end flap portion EF of the disposable diaper of the fourth embodiment. The stripped portion 60C is formed with a non-cutting line 61 extending in the width direction and a wavy portion 70C extending from the left end of the non-cutting line 61 toward the front left and reaching the front end of the end flap portion EF. A cutting line (“first cutting line” in the claims) 62C and a wavy portion 70C extending from the right end of the non-cutting line 61 toward the front right to reach the front end of the end flap portion EF are formed. It is surrounded by a cutting line (“second cutting line” in the claims) 63C.

The cutting line 62C and the cutting line 63C are formed symmetrically with respect to the center line A extending in the front-rear direction at the center in the width direction. An imaginary center line D connecting the points of inflection of the convex and concave arcs forming the wavy portion 70C of the cutting line 62C and the imaginary line B extending in the front-rear direction intersect at an acute angle of 60 degrees. An imaginary center line E connecting the inflection points of the convex and concave arcs forming the wavy portion 70C of the cutting line 63C and the imaginary line B extending in the front-rear direction intersect at an acute angle of 60 degrees. there is

As shown in FIG. 11, when starting umbilical care of a newborn baby, the cut portion 62C and the cut portion 63C are cut over a predetermined length to cover the navel from the end flap portion EF. The stripped portion 60C is stripped away from the body. As a result, the navel is exposed from the end flap portion EF, and navel care can be performed more easily. Further, both side portions 65C at the intermediate portion of the end flap portion EF from which the stripped portion 60C has been stripped are formed in a wavy shape. As a result, the two side portions 65C at the intermediate portion of the end flap portion EF from which the stripped portion 60C has been stripped off fit more flexibly to the abdomen of the newborn, thereby further preventing trauma to the abdomen of the newborn. .

The stripped part 60</b>C that is stripped away from the body can be inserted into a storage part 57 formed between the side of the exterior sheet 12 opposite to the body and the side of the target sheet 55 . This prevents the stripping portion 60C from covering the side of the target sheet 55 opposite to the body, and the fastening tape 50 can be locked at an arbitrary position on the side of the target sheet 55 opposite to the body. Further, the cutting line 62C and the cutting line 63C on which the wavy portion 70C of the stripping portion 60C inserted into the storage portion 57 are engaged more efficiently with the storage portion 57 via the adhesion portion 66 of the storage portion 57. As a result, the stripping portion 60</b>C inserted into the storage portion 57 can be reliably inserted and maintained by the storage portion 57 .

Next, the forms of the waved portion 70B and the waved portion 70C will be described. The wavy portion 70B and the wavy portion 70C can be formed in a sinusoidal shape as shown in FIG. 12(a) and in an arc shape as shown in FIG. 12(b). The sinusoidal shape and the arcuate shape can be formed in any shape, but the amplitude 71 centered on the virtual center line D or E is formed to be 3 to 10 mm, and the wavelength 72 is 10 mm. It is preferably formed to ~20 mm.

Next, the 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 perforated or non-perforated nonwoven fabric, porous plastic sheet, or the like. In addition, among these, the nonwoven fabric is not particularly limited as to what the raw material fibers are. 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 in which two or more of these are used. etc. can be exemplified. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of processing methods include known methods such as spunlace, spunbond, thermal bond, meltblown, needle punch, air through, and point bond methods. For example, if flexibility and drapeability are desired, the spunlace method is preferable, and if bulkiness and softness are desired, the thermal bond method is the preferable processing method.

(back seat)
The back sheet 11 is made of an olefin 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 substantially ensures liquid impermeability by interposing a waterproof film (in this case, a waterproof film). and the nonwoven fabric constitute the back sheet.) and the like. Of course, in addition to this, materials having liquid impermeability and moisture permeability, which have been favorably used in recent years from the viewpoint of preventing stuffiness, can also be exemplified. The liquid-impermeable and moisture-permeable material sheet is formed by, for example, kneading an inorganic filler into an olefin resin such as polyethylene or polypropylene, molding the sheet, and then stretching it in a uniaxial or biaxial direction. can be exemplified by the microporous sheet obtained by In addition, non-woven fabrics using microdenier fibers, leakproofness enhanced by applying heat and pressure to reduce the voids in the fibers, and methods such as coating with superabsorbent or hydrophobic resins and water repellents are used to improve waterproofing. A liquid-impermeable sheet without using a film can also be used as the back sheet 11 .

(exterior sheet)
The outer sheet 12 is a part for supporting the absorbent element 20 and attaching it to the wearer. The exterior sheet 12 has an hourglass shape with constricted central portions in the front-rear direction of both sides, which surround the wearer's legs.

The exterior sheet 12 is preferably made of nonwoven fabric, but is not limited to this. The type of nonwoven fabric is not particularly limited, and the material fibers include, for example, 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. As a processing method, a spun lace method, a spun bond method, a thermal bond method, an air through method, a needle punch method, or the like can be used. However, spunbond nonwoven fabrics, SMS nonwoven fabrics, SMMS nonwoven fabrics, and other long-fiber nonwoven fabrics are suitable because they can achieve both good texture and strength. The non-woven fabric can be used singly or in multiple layers. In the latter case, it is preferable to bond the nonwoven fabrics together with a hot-melt adhesive or the like. When non-woven fabric is used, its fiber basis weight is preferably 10 to 50 g/m ² , particularly 15 to 30 g/m ² .

(intermediate sheet)
The intermediate sheet 15 is made of the same material as the top sheet 10 . The intermediate sheet 15 is preferably joined to the top sheet 10. When heat embossing or ultrasonic welding is used for the joining, 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 fiber fineness of the nonwoven fabric is preferably about 2.0 to 5.0 dtex.

(Absorber)
Absorbent body 21 can be formed from an aggregate of fibers. The filament assembly may be a filament assembly obtained by laminating short fibers such as cotton pulp or synthetic fibers, or by opening tows (fiber bundles) of synthetic fibers such as cellulose acetate as necessary. can also be used. The fiber basis weight can be, for example, about 100 to 300 g/m ² when piling up cotton-like pulp or short fibers, and for example, about 30 to 120 g/m ² for filament aggregates. can be done. The fineness of synthetic fibers is, for example, 1 to 16 dtex, preferably 1 to 10 dtex, more preferably 1 to 5 dtex. In the case of a filament assembly, the filaments may be non-crimped fibers, but crimped fibers are preferred. The degree of crimping of the crimped fibers can be, for example, about 5 to 75, preferably 10 to 50, more preferably 15 to 50 crimps per inch. Moreover, crimped fibers that are uniformly crimped are often used.

The absorbent body 21 preferably contains superabsorbent polymer particles, and in particular, superabsorbent polymer particles (SAP particles) are dispersed substantially throughout the thickness of the fiber assembly at least in the liquid receiving region. It is desirable to have

If there are no SAP particles in the upper, lower, and intermediate portions of the absorbent body 21, or if there are only a few SAP particles, it cannot be said that they are "dispersed throughout the thickness direction". Therefore, "dispersed throughout the thickness direction" refers to a form in which the fiber aggregate is "uniformly" dispersed throughout the thickness direction, as well as "unevenly distributed" in the upper, lower and/or intermediate portions. It also includes a form in which there is "but is still dispersed in the upper, lower and middle parts." Also excluded are forms in which some of the SAP particles remain on the surface without penetrating into the fiber aggregate, and forms in which some of the SAP particles pass through the fiber aggregate and are on the packaging sheet 22. not something.

Superabsorbent polymer particles include "powder" in addition to "particles". As for the particle size of the superabsorbent polymer particles, those used in this type of absorbent article can be used as they are. Materials for the superabsorbent polymer particles may be used without any particular limitation, but those having a water absorption of 40 g/g or more are suitable. Superabsorbent polymer particles include starch-based, cellulose-based, and synthetic polymer-based particles, including starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and crosslinked sodium carboxymethyl cellulose. and acrylic acid (salt) polymers, etc. can be used. As for the shape of the superabsorbent polymer particles, the powder particles that are commonly used are 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 rate is too slow, the liquid supplied into the absorbent body 21 tends to return to the outside of the absorbent body 21, which is called reversion.

The basis weight of the superabsorbent polymer particles can be appropriately determined according to the absorption amount required for the use of the absorbent body 21 . Therefore, although it cannot be generalized, it can be 50 to 350 g/m ² . If the basis weight of the polymer is less than 50 g/m ² , it becomes difficult to secure the absorption capacity. If the amount exceeds 350 g/m ² , not only the effect is saturated, but also the excessive superabsorbent polymer particles give a gritty feeling of discomfort.

(packaging sheet)
The packaging sheet 22 is made of tissue paper, particularly crepe paper, nonwoven fabric, poly-laminated nonwoven fabric, a perforated sheet, or the like. However, it is desirable that the sheet is such that the superabsorbent polymer particles do not escape. When non-woven fabric is used instead of crepe paper, hydrophilic SMMS (spunbond/meltblown/meltblown/spunbond) nonwoven fabric is particularly suitable, and polypropylene, polyethylene/polypropylene, etc. can be used as the material. The fiber basis weight is preferably 5 to 40 g/m ² , particularly 10 to 30 g/m ² .

(Three-dimensional gather)
A water-repellent non-woven fabric can be used as the gather sheet 31 of the three-dimensional gather 30, and thread rubber or the like can be used as the elastic stretchable member 32. As shown in FIG. In addition to providing a plurality of elastic members, one elastic member can be provided for each.

The side surface of the gather sheet 31 opposite to the body has a fixing start end in the width direction on the side part of the top sheet 10, and the portion on the width direction outer side from the fixing start end is positioned on the side part of the back sheet 11 and on the width direction outer side thereof. It is fixed to the side of the exterior sheet 12 with a hot-melt adhesive or the like.

Around the legs, the width direction inner side from the fixing start end of the three-dimensional gathers 30 is fixed on the top sheet 10 at both ends in the front and back direction of the product, but the portion in between is a non-fixed free portion. It stands up due to the contractile force of the elastic expansion/contraction member 32 . When the diaper is put on, the diaper is put on the body in a boat-like shape and the contractile force of the elastic stretchable member 32 acts, so that the three-dimensional gathers 30 stand up due to the contractile force of the elastic stretchable member 32 and closely fit around the legs. . As a result, so-called side leakage from around the leg is prevented.

(flat gather)
Between the gathered sheet 31 and the back sheet 11, leg-surrounding elastic stretchable members 41 made of thread rubber or the like are fixed in a state of being stretched along the front-rear direction. A plurality of leg-surrounding elastic stretchable members 41 may be provided, or one each 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 with a hot melt adhesive or the like. The base material 51 is made of nonwoven fabric, plastic film, poly-laminated nonwoven fabric, paper, or a composite material thereof.

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

(target sheet)
The target sheet 55 is formed of a plastic film, a non-woven fabric, or the like on which a large number of loop yarns are provided.

<Description of terms in the specification>
When used in the specification, the following terms shall have the following meanings, unless stated otherwise in the specification.

- "Front-back (longitudinal) direction" means a direction connecting the ventral side (front side) and the dorsal side (rear side), and "width direction" means a direction (horizontal direction) perpendicular to the front-back direction.
- "Front side" means the side closer to the wearer's skin, and "back side" means the side farther from the wearer's skin. "Front" means the side of the member that is closer to the wearer's skin, and "back" means the side that is farther from the wearer's skin.
・"MD direction" and "CD direction" mean the flow direction (MD direction) and the lateral direction (CD direction) perpendicular to this in the manufacturing equipment, and either one is the front-back direction of the product. , and the other is the width direction of the product. The MD direction of a nonwoven fabric is the direction of fiber orientation of the nonwoven fabric. The fiber orientation is the direction along which the fibers of the nonwoven fabric are aligned. It can be determined by a simple measurement method for determining the orientation direction.
- "Unfolded" means a flat unfolded state without contraction or slack.
- "Elongation rate" means a value when the natural length is taken as 100%. For example, an elongation rate of 200% is synonymous with an elongation ratio of 2 times.
- "Gel strength" is measured as follows. 1.0 g of superabsorbent polymer is added to 49.0 g of artificial urine and stirred with a stirrer. The resulting gel is left in a constant temperature and humidity bath at 40° C. and 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" contains urea: 2 wt%, sodium chloride: 0.8 wt%, calcium chloride dihydrate: 0.03 wt%, magnesium sulfate heptahydrate: 0.08 wt%, and deionized water: 97 09 wt% and used at a temperature of 40°C unless otherwise specified.
- "Balance weight" is measured as follows. After pre-drying the sample or test piece, it is left in a test room or apparatus under standard conditions (test location: temperature 23±1° C., relative humidity 50±2%) to a constant weight. Pre-drying refers to making a sample or test piece constant weight in an environment at a temperature of 100°C. Fibers with an official moisture content of 0.0% do not need to be pre-dried. Using a sampling template (100 mm x 100 mm), a sample with dimensions of 100 mm x 100 mm is cut from the constant weight specimen. The weight of the sample is measured, multiplied by 100 to calculate the weight per square meter, and used as basis weight.
- "Thickness" is automatically measured using an automatic thickness gauge (KES-G5 handy compression tester) under the conditions of a load of 0.098 N/cm ² and a pressurized area of 2 cm ² .
・The “water absorption” is measured according to JIS K7223-1996 “Testing method for water absorption of super absorbent polymer”.
・"Water absorption rate" is "Time to end point" when JIS K7224-1996 "Test method for water absorption rate of superabsorbent polymer" is performed using 2g of superabsorbent polymer and 50g of physiological saline. and
・If there is no description of environmental conditions for testing or measurement, the test or measurement shall be performed in a laboratory or equipment under standard conditions (test location: temperature 23±1°C, relative humidity 50±2%). do.
・Unless otherwise specified, the dimensions of each part mean the dimensions in the unfolded state, not in the natural length state.

INDUSTRIAL APPLICABILITY The present invention is applicable to absorbent articles such as disposable diapers.

10 Top sheet 11 Back sheet 12 Exterior sheet 21 Absorber 50 Fastening tape 55 Target sheet 57 Storage part 60 Stripping part 60A Stripping part 60B Stripping part 60C Stripping part 61 Non-cutting line 62 Cutting line (first cutting line)
62A cutting line (first cutting line)
62B cutting line (first cutting line)
62C cutting line (first cutting line)
63 cutting line (second cutting line)
63A cutting line (second cutting line)
63B cutting line (second cutting line)
63C cutting line (second cutting line)
EF End flap part SF Side flap part

Claims (3)

A disposable disposable comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, an absorbent body provided between the top sheet and the back sheet, and an exterior sheet provided on the opposite side of the back sheet to the body. In diapers
end flap portions are formed on both sides in the front-rear direction of the absorbent body,
Forming side flap portions on both sides in the width direction of the absorbent body,
Fastening tapes are provided on both sides of the dorsal portion of the side flap portion,
A rectangular target sheet to which the fastening tape engages is provided on the side opposite to the body of the ventral portion of the exterior sheet,
forming a stripping portion formed so as to be strippable from the end flap portion at an intermediate portion in the width direction of the end flap portion located on the ventral side;
In a plan view on the side opposite to the body, the outer peripheral portion of the stripping portion includes a non-cutting line extending in the width direction and a first line extending leftward from the left part of the non-cutting line toward the ventral side. Formed by a cutting line and a second cutting line extending toward the right side as it goes from the right part of the non-cutting line to the ventral side,
Both sides of the target sheet in the width direction are fixed to the exterior sheet, and an intermediate portion in the width direction of the target sheet is not fixed to the exterior sheet to form a storage section,
A stripped portion stripped from the end flap portion toward the side opposite to the body is inserted into the storage portion ,
A disposable diaper , wherein the non-cutting line is provided between the ventral end of the target sheet and the ventral end of the absorber in plan view on the side opposite to the body . The first cutting line and the imaginary line extending in the front-rear direction form an acute-angle intersection angle of 30 to 70 degrees, and the second cutting line and the imaginary line extending in the front-rear direction form an acute-angle intersection angle. The disposable diaper according to claim 1, which is formed at 30 to 70 degrees. 3. The disposable diaper according to claim 1, wherein sinusoidal or arcuate wavy portions are formed on said first cutting line, and sinusoidal or arcuate wavy portions are formed on said second cutting line.

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