JP6421052B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a deployable disposable diaper.

  The unfolded disposable diaper is generally a pair of an absorbent body interposed between a liquid-permeable sheet and a liquid-impermeable sheet, and extending from the waistline portion covering the back side of the wearer to both outer sides in the width direction. The fastening tape is fixed to the wearer by being locked to the waistline portion covering the abdomen of the wearer. Moreover, the disposable diaper having the hourglass shape of the absorbent body, that is, the end of the absorbent body in the width direction is curved so as to be convex inward in the width direction, and the absorbent body is located at the longitudinal center of the disposable diaper. A disposable diaper that has the smallest width has been proposed (see, for example, Patent Document 1).

JP 2002-253608 A

  The absorbent body described in Patent Document 1 is relatively large and easily follows the base of a baby's leg sleeping with its legs extended. However, the baby born relatively small takes the posture when it was in the womb, that is, the posture where the legs are pulled up in an M shape so that both knees are attached to the abdomen, so that the base of the leg is located in the abdomen. . Therefore, as in Patent Document 1, the absorbent body with the narrowest center in the longitudinal direction of the disposable diaper is difficult to follow along the base of the baby's leg that takes a posture when in the womb. As a result, a highly rigid absorbent body gives a feeling of pressure to the wearer, or a gap is generated between the disposable diaper and the wearer, and excrement leaks.

  This invention is made | formed in view of said problem, Comprising: The objective is to provide the unfoldable disposable diaper which is easy to follow the body of the child who takes the attitude | position when it exists in the womb.

The main invention for achieving the above object is:
A deployable disposable diaper having a longitudinal direction and a width direction intersecting with each other, and a first waistline part, a crotch part, and a second waistline part arranged from one side of the longitudinal direction,
An absorbent core;
A pair of fastening tapes extending from the first waistline portion to both outer sides in the width direction,
The fastening tape includes a locking portion that is locked when worn,
The longitudinal direction in which the end of the crotch part in the longitudinal direction of the engaging portion provided on the fastening tape is located when the second waistline portion aligns the longitudinal ends of the disposable diaper. A fastening end of the fastening tape at the position of
The absorbent core has at least a pair of notches at both ends in the width direction,
In the longitudinal direction,
Of the region between the product center that is the center of the disposable diaper and the locking end, the absorption that is sandwiched between the pair of notches in the region between the center of the region and the locking end The part of the body core where the width is the narrowest is located,
In the longitudinal direction, when the opposite side to the one side is the other side,
In the position of the locking end in the longitudinal direction, the width of the absorber core is narrower than the width of the absorber core at the other end of the absorber core ,
The absorber core extends in the width direction of the absorber core such that the inner side in the width direction is convex from the other side of the pair of notches to the one side of the product center. A disposable diaper characterized in that both ends are curved .
Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

  ADVANTAGE OF THE INVENTION According to this invention, the unfoldable disposable diaper which is easy to be along with the body of the child who takes the attitude | position when it exists in the womb can be provided.

It is a schematic plan view by the side of the skin of the wearer of the diaper which is a deployment and extension state. 2A and 2B are cross-sectional views of the diaper at position AA and position BB in FIG. FIG. 3A is an explanatory diagram of the posture of a child whose weight is greater than 3000 g, and FIGS. 3B and 3C are explanatory diagrams of the posture of a low-weight child. It is explanatory drawing of the position of the ventral side notch provided in the absorber core. It is explanatory drawing of the position of the ventral side notch provided in the absorber core. It is a table | surface which shows the result of the evaluation test which shifted the position of the longitudinal direction of the ventral notch. FIG. 7A is a schematic perspective view of a diaper, and FIG. 7B is an explanatory view of the shape of a ventral cutout and a dorsal cutout. It is a schematic plan view of the diaper in a modification. It is a schematic plan view of the diaper in a modification.

  At least the following matters will become apparent from the description of the present specification and the accompanying drawings.

An unfolded disposable diaper having a longitudinal direction and a width direction intersecting each other and having a first waistline portion, a crotch portion, and a second waistline portion arranged from one side of the longitudinal direction, the absorbent core and A pair of fastening tapes extending from the first waistline portion to both outer sides in the width direction, and when the second waistline portion is aligned with the longitudinal ends of the disposable diaper, The fastening tape has a fastening end of the fastening tape at a position in the longitudinal direction where an end of the crotch part in the longitudinal direction of the fastening tape is located, and the absorbent core has at least a pair of both ends in the width direction. In the region between the center of the disposable diaper and the locking end in the longitudinal direction, the region between the center of the region and the locking end in the longitudinal direction. The pair of The sites of greatest width is reduced among portions of the absorbent core sandwiched away portion is located, it is a disposable diaper characterized by.
According to such a disposable diaper, at the position of the wearer's leg that takes the posture when in the womb, the cutout part of the absorbent core (the narrow part of the absorbent core), that is, the degree of freedom of deformation is high. The site | part of an absorber core can be provided and an absorber core becomes easy to follow a wearer's leg. Therefore, the pressure on the wearer by the absorbent core is reduced, and a gap is hardly generated between the disposable diaper and the wearer, and excrement leakage can be suppressed.

In this disposable diaper, the second waistline portion has a pair of side flaps extending from the crotch portion on both outer sides in the width direction, and the product center and the side flaps in the longitudinal direction. The absorber that is sandwiched between the pair of cutout portions in the region on the other side of the center of the region between the one end in the longitudinal direction of the outermost ends in the width direction The disposable diaper is characterized in that the narrowest part of the core part is located.
According to such a disposable diaper, an absorber core becomes easy to follow a wearer's leg lifted to a position nearer to a side flap.

In this disposable diaper, in the longitudinal direction, the pair of notches in the region on the other side of the center of the region between the product center and the other end of the absorbent core. The disposable diaper is characterized in that a portion having the narrowest width is located among the portions of the absorbent core sandwiched between the two.
According to such a disposable diaper, an absorber core becomes easy to follow a wearer's leg lifted to a position nearer to the other end of the absorber core.

In such a disposable diaper, the length of the disposable diaper in the longitudinal direction is a first length, and the end of the disposable diaper in the longitudinal direction is sandwiched between the pair of notches. When the length in the longitudinal direction to the end on the other side in the longitudinal direction of the part having the narrowest width among the parts of the absorbent core is the second length, the length relative to the first length The disposable diaper is characterized in that the ratio of the second length is 22% or more and 26% or less.
According to such a disposable diaper, an absorber core becomes easy to follow a leg of a wearer who takes a posture when being in the womb.

Such a disposable diaper is characterized in that the absorbent core has another pair of cutout portions on the one side in the longitudinal direction from the pair of cutout portions.
According to such a disposable diaper, in the crotch part of the wearer who takes the posture when in the womb, the part of the absorbent core between the two pairs of notches, that is, the absorbent core having a high degree of freedom of deformation. Thus, the wearer's crotch tightening force can be reduced by deformation of the absorbent core. Moreover, each pair of notch part becomes a folding base point of the longitudinal direction of a disposable diaper, and a disposable diaper can be three-dimensionally molded along a wearer's body.

Such a disposable diaper is sandwiched between the other pair of notches in a region from the product center to both sides in the longitudinal direction up to 10% of the longitudinal length of the disposable diaper. The disposable diaper is characterized in that a portion having the narrowest width is located among the portions of the absorbent core.
According to such a disposable diaper, the other pair of notches are located at the back part of the base of the wearer's leg that takes the posture when in the womb, and the posture when in the womb The disposable diaper can be three-dimensionally shaped so as to follow the wearer's body.

Such a disposable diaper is stretchable at both ends in the width direction so as to expand and contract in the longitudinal direction at least within the range in the longitudinal direction from the pair of notches to the other pair of notches. A member is provided, and the shape of the notch is such that the outer portion in the width direction is longer in the longitudinal direction than the inner portion, and the position in the longitudinal direction of the top is the width. A disposable diaper characterized by having a shape located between both ends in the longitudinal direction of the outer ends in the direction.
According to such a disposable diaper, a disposable diaper is formed between each pair of cutout portions so that a folding fold is formed along the width direction and along the wearer's body taking a posture when in the womb. It becomes easier to form three-dimensionally.

In such a disposable diaper, folding folds along the width direction are formed in the natural state of the disposable diaper between the pair of notches and the other pair of notches, respectively. This is a disposable diaper characterized by that.
According to such a disposable diaper, the disposable diaper is more easily three-dimensionally shaped along the wearer's body that takes the posture when in the womb, and the assistant wearing the disposable diaper on a low-weight child also By visually recognizing the folds, the disposable diaper can be worn according to the posture when in the womb.

In such a disposable diaper, the width of the absorbent core between the pair of notches and the other pair of notches is closer to the other side in the longitudinal direction than the pair of notches. A disposable diaper characterized by being equal in width to the absorbent core.
According to such a disposable diaper, the amount of excretion absorbed can be secured while the absorbent core is placed along the leg of the wearer who takes the posture when in the womb.

=== General configuration of disposable diaper ===
The disposable diaper of the present embodiment is a deployable disposable diaper (hereinafter referred to as diaper) particularly suitable for a child having a weight of 3000 g (gram) or less (hereinafter referred to as a low-weight child), and specifically, has a weight of 2500 g. It is a suitable diaper for low birth weight infants with a weight of less than 1500 g, extremely low birth weight infants with a weight of less than 1500 g, and extremely low birth weight infants with a weight of less than 1000 g.

  FIG. 1 is a schematic plan view of the wearer's skin side (inner side) of the diaper 1 in an unfolded and extended state, and FIGS. 2A and 2B are cross-sectional views of the diaper 1 at positions AA and BB in FIG. It is. The diaper 1 has a longitudinal direction, a width direction, and a thickness direction that intersect each other (orthogonal in the present embodiment), and from one side of the longitudinal direction, the first waistline portion 1a, the crotch portion 1b, and the first Two waistline portions 1c are arranged. In general, the first waistline portion 1a is worn so as to cover the wearer's back side portion and the second waistline portion 1c is covered so as to cover the wearer's belly side portion.

  The diaper 1 has the absorber 4 between the liquid-permeable top sheet 2 and the liquid-impermeable back film 3, as shown in FIG. The absorbent body 4 extends in the longitudinal direction from the first waistline portion 1a to the second waistline portion 1c, and an absorbent core 41 made of an absorbent material (for example, pulverized pulp or high-absorbent polymer) that absorbs and holds excreta, It has a liquid-permeable covering material 42 (for example, a tissue sheet or a spunbonded nonwoven fabric) for covering it. Moreover, the exterior sheet 5 (for example, nonwoven fabric) which comprises the exterior of the whole diaper 1 is provided in the non-skin side of the back film 3. FIG. Although not shown, in order to improve the fit around the waist, for example, a stretchable member (for example, a stretchable sheet member or a thread-like stretchable member) that can be stretched in the width direction is provided in the first waistline 1a. Good.

  Moreover, as shown in FIG. 1, the planar shape of the absorber 4 (covering material 42) is a rectangle. On the other hand, the absorber core 41 is constricted at both ends in the width direction, and at the constricted portions, that is, a pair of large cutouts, a pair of small ventral cutouts 43 having a mountain shape, and A pair of dorsal notches 44 are provided. The ventral cutout 43 and the dorsal cutout 44 are areas where the absorbent material constituting the absorbent core 41 is not present. The pair of ventral cutouts 43 are formed in the same position in the longitudinal direction and arranged in the width direction, and the pair of dorsal cutouts 44 are longer in the longitudinal direction than the pair of ventral cutouts 43. It is one side (back side) and is formed side by side in the width direction at the same position in the longitudinal direction. That is, the absorber core 41 has a symmetrical shape in the width direction. In the present embodiment, the depth in the width direction is made substantially equal between the ventral cutout portion 43 and the dorsal cutout portion 44, but the depth in the width direction may be varied.

  The first waistline portion 1a has a pair of dorsal side flaps 13 extending from the crotch portion 1b on both outer sides in the width direction, and the second waistline portion 1c is also located on both outer sides in the width direction than the crotch portion 1b. It has a pair of ventral side flaps 14 (side flaps) that extend. Each of the side flaps 13 and 14 is formed by overlapping a back film 3 and a three-dimensional gather sheet 21 described later. A pair of fastening tapes 10 extend from the pair of back side flaps 13 (first waistline portion 1a) to both outer sides in the width direction.

  The fastening tape 10 has a base material 11 and a hook sheet 12, and the hook sheet 12 is provided on the skin side surface in the thickness direction of the base material 11. The hook sheet 12 faces the exterior sheet 5 (non-skin side surface) of the second waistline 1c and is locked to the exterior sheet 5 when it is folded to the second waistline 1c side. Therefore, the hook sheet 12 (for example, a sheet including a male material of a hook-and-loop fastener) can be locked and removed from the exterior sheet 5 (for example, a nonwoven fabric). Note that the hook sheet 12 is not limited to being directly locked to the exterior sheet 5, and for example, a target sheet (for example, a sheet including a female material of a hook-and-loop fastener) that can hook the hook sheet 12 is provided on the exterior sheet 5. Alternatively, the hook sheet 12 may be locked.

  When the diaper 1 is worn, it is first folded in the longitudinal direction while being applied to the wearer, and then the pair of dorsal side flaps 13 are folded inward in the width direction, and the second waistline portion 1c. A pair of fastening tapes 10 are locked to the outer sheet 5. As a result, a waistline opening and a pair of leg openings are formed.

  Further, at both ends of the diaper 1 in the width direction, leg-holes stretchable members 6 that can be stretched in the longitudinal direction are provided. The leg-holes stretchable member 6 is fixed between the top sheet 2 or the three-dimensional gather sheet 21 and the back film 3 in a state of extending in the longitudinal direction. Therefore, in the diaper 1 in the natural state, the leg-hole stretchable member 6 contracts, and a leg-hole gather is formed at the peripheral edge portion of the leg-hole opening to fit around the wearer's leg.

  In this embodiment, the leg-holes stretchable member 6 is a thread-like stretchable member (for example, a thread-like polyurethane stretchable fiber or a thread-like natural rubber), and the leg-holes stretchable at each end in the width direction of the diaper 1. Two members 6 are arranged in the width direction, but the number of leg-holes elastic members 6 is not limited to this. The leg-hole stretchable member 6 may be a stretchable sheet member (for example, a stretchable film or a stretchable nonwoven fabric made of stretchable fibers formed by melting a thermoplastic elastomer resin into a film shape).

  In addition, a pair of three-dimensional gathers 20 that stand on the skin side (wearer side) are provided at both ends of the diaper 1 in the width direction. Each three-dimensional gather 20 includes a three-dimensional gather sheet 21 and a three-dimensional gather elastic member 22. As shown in FIG. 2, the outer ends in the width direction of the three-dimensional gather sheet 21 and the exterior sheet 5 coincide with each other. On the other hand, the inner end portion in the width direction of the three-dimensional gather sheet 21 is folded on the top sheet 2 side (non-skin side), and the three-dimensional gather sheet 21 is formed between the two-dimensional solid gather sheet 21. 22 (one thread-like elastic member in this embodiment) is fixed in a state of being elongated in the longitudinal direction. Moreover, although not shown in figure, the both ends of the longitudinal direction of the three-dimensional gather sheet | seat 21 are joined to the top sheet 2 with the adhesive agent etc. And the site | part of the three-dimensional gather sheet | seat 21 of the outer side of the width direction is joined to the top sheet 2 over the other end of the longitudinal direction from the both ends of the joined longitudinal direction, The junction part (base end part) However, this is the starting point of the three-dimensional gather 21 that rises due to the contraction of the elastic member 22 for the three-dimensional gather.

  Moreover, the diaper 1 of this embodiment is for low weight children. Therefore, in a state where the product is extended without wrinkles, specifically, in a state where the dimension of the member (for example, the exterior sheet 5) constituting the diaper 1 is equal to or close to the dimension of the member itself. The product dimensions should be as follows. The product length in the longitudinal direction when the product is extended in the longitudinal direction is in the range of 210 to 330 mm. Specifically, the product length for a weight less than 2500 g is 310 mm, the product length for a weight less than 1500 g is 270 mm, and the weight is less than 1000 g. The product length is preferably 230 mm. The waist dimension (peripheral length of the waist opening) is in the range of 160 to 295 mm. Specifically, the waist dimension for a weight less than 2500 g is 273.5 mm, and the waist dimension for a weight less than 1500 g is 220 mm. The waist dimension is such that one end of the fastening tape 10 is aligned with the widthwise end of the hook sheet 12 of the other fastening tape 10 and a stretchable member is provided around the waist. In the case where it is, it is a dimension in a state where the product is extended in the width direction.

=== Problems specific to low weight children ===
FIG. 3A is an explanatory diagram of the posture of a child having a weight greater than 3000 g, and FIGS. 3B and 3C are explanatory diagrams of the posture of a low-weight child.
For example, a child weighing more than 3000 g often takes a posture in which the legs (thighs) 7 are extended as shown in FIG. 3A. Therefore, the center part (shaded part of a figure) of the longitudinal direction of the diaper 1 is inserted | pinched between the legs 7 (groin part). Therefore, in the central part in the longitudinal direction of the diaper, for example, by curving so that the end in the width direction of the absorbent core is convex inward, that is, in the first and second waistline parts 1a and 1c, the absorbent core By widening the width and narrowing the width of the absorbent core at the center in the longitudinal direction, the absorbent core can be placed along the base of the leg 7 of the infant having a weight of more than 3000 g.

  On the other hand, for example, a low-weight child with a weight of 3000 g or less is placed in the position when it is in the womb, that is, both knees are attached to the abdomen, as shown in FIGS. In many cases, the posture is such that the leg 7 is lifted into a letter shape (hereinafter referred to as a positioning posture). Therefore, a region on the abdomen side (hatched portion in the drawing) of the diaper 1 in the longitudinal direction, that is, the second waistline portion 1c covering the abdomen is sandwiched between the legs 7.

  Therefore, the diaper suitable for the posture of a child having a weight of more than 3000 g (that is, a diaper in which the width of the absorbent core of the second waistline portion 1c is wide and the width of the absorbent core is narrowest at the center in the longitudinal direction). Even when a low-weight child wearing a positioning posture wears, the absorbent core does not follow the base of the leg 7. And the site | part of the absorber core with the wide width | variety of the 2nd waist part 1c will be pinched | interposed into the leg 7. FIG. Therefore, a highly rigid absorbent core gives a feeling of pressure to the wearer's leg, or the absorbent core is called, creating a gap between the disposable diaper and the wearer, and excrement can easily leak. End up. In addition, there is a possibility that the part where the rigidity of the absorbent core is lowered due to the notch is located in the center of the wearer's crotch part, i.e., the part where the crotch tightening force is strong. It becomes easy to drool.

  Therefore, an object of the present embodiment is to provide a diaper 1 that is easy to follow along with the body of a low-weight child taking a positioning posture.

=== Absorptive core ===
4 and 5 are explanatory views of the position of the ventral cutout 43 provided in the absorber core 41. FIG. FIG. 6 is a table showing the results of an evaluation test in which the position in the longitudinal direction of the ventral cutout 43 is shifted. FIG. 7A is a schematic perspective view of the diaper 1, and FIG. 7B is an explanatory view of the shapes of the ventral cutout portion 43 and the dorsal cutout portion 44.

  Fastening tape 10 (hook sheet 12) is usually a second diaper 1 in which both ends 1A, 1B in the longitudinal direction are aligned and the fastening tape 10 is folded inward in the width direction so as to face the fastening tape 10. It is locked around the periphery of the waistline portion 1c. Therefore, in this embodiment, when both ends 1A and 1B in the longitudinal direction of the diaper 1 are aligned, the end 10a (12a) on the longitudinal center side (crotch 1b) side of the fastening tape 10 (hook sheet 12) is positioned. The position in the longitudinal direction (position a in FIG. 4) is defined as a locking end 1c1 of the fastening tape 10 in the second waistline portion 1c. In other words, when the length in the longitudinal direction from the end 1A on one side in the longitudinal direction of the diaper 1 to the end 10a (12a) on the longitudinal center side of the fastening tape 10 (hook sheet 12) is L3, the diaper 1 A position separated from the end 1B on the other side in the longitudinal direction by a length L3 toward the center in the longitudinal direction is a locking end 1c1 of the fastening tape 10.

  Note that when the fastening tape 10 and the hook sheet 12 do not coincide with the ends 10a, 12a on the center side in the longitudinal direction, the position of the end 12a on the center side in the longitudinal direction of the hook sheet 12 is defined as a locking end 1c1. Further, the shape of the hook sheet 12 (fastening tape 10) is not limited to a rectangle, but may be a trapezoid, for example. In this case, the end 12a on the center side in the longitudinal direction of the hook sheet 12 is inclined with respect to the width direction. Therefore, the position of the outermost part in the longitudinal direction of the end 12a on the center side in the longitudinal direction of the hook sheet 12 is defined as a locking end 1c1.

And in the diaper 1 of this embodiment, as shown in FIG. 4, 1st area | region A1 between the product center (position b) which is the center of the longitudinal direction of the diaper 1, and the latching end 1c1 (position a). Among these, the second region A2 between the center (position c) in the longitudinal direction of the first region A1 and the locking end 1c1 (position a).
In addition, the top 43a of the ventral cutout 43 is located.

  In other words, of the portions of the absorbent core 41 sandwiched between the pair of ventral cutout portions 43 (shaded portions in FIG. 7B), the portion with the smallest width is located in the second region A2. In addition, in this embodiment, although the position of the longitudinal direction of each top part 43a of a pair of ventral notch part 43 is equal, you may shift | deviate. In that case, the part of the absorber core 41 sandwiched between the pair of ventral cutouts 43 is a longitudinal direction in which both longitudinal ends 43b and 43c (see FIG. 7B) of one ventral cutout 43 are located. The range and the range in the longitudinal direction where the longitudinal ends 43b and 43c of the other ventral cutout 43 are located serve as a part of the absorbent core 41 located in the overlapping region.

  Thus, in the diaper 1 of this embodiment, the ventral-side notch 43 is located closer to the locking end 1c1 of the fastening tape 10 than the product center (position b). The diaper 1 is mainly fixed to a wearer with a fastening tape 10 (hook sheet 12). Therefore, the base of the wearer's leg taking the positioning posture is lifted to a position close to the locking end 1 c 1 of the fastening tape 10. Therefore, by providing the ventral cutout portion 43 in the second region A2 near the locking end 1c1 of the fastening tape 10, the ventral cutout portion 43 is placed at the base of the wearer's leg taking a positioning posture. Can be provided.

  The absorber core 41 around the ventral cutout 43 has a narrow width and a low rigidity and a high degree of freedom in deformation compared to other parts. Therefore, by providing the ventral side notch 43 at the position of the base of the wearer's leg taking the positioning posture, the absorbent core 41 can be easily along the base of the wearer's leg. Therefore, the pressure to the wearer's leg by the absorber core 41 is reduced, and the wearer can easily take a positioning posture. In other words, the force that the diaper 1 fixed to the wearer with the fastening tape 10 receives from the leg that wants to take a positioning posture (the force that tries to shift the diaper 1 to the ventral side) is transformed into the ventral notch 43. Can reduce pressure on the wearer. Therefore, the wearing comfort of the diaper 1 can be improved and the swelling of the wearer can be suppressed. Moreover, since it becomes difficult to produce a clearance gap between the diaper 1 and a wearer, the leak of excrement can be suppressed because the absorber core 41 is prevented from shaking.

  However, if the top 43a of the ventral notch 43 is provided on the other side (abdomen side) in the longitudinal direction from the locking end 1c1 of the fastening tape 10, the locking position of the fastening tape 10 is The probability that the level difference (thickness difference) of the absorber core 41 due to the ventral notch 43 is increased. Then, the fastening force of the fastening tape 10 is weakened, or the fastening tape 10 is easily detached due to deformation of the absorbent core 41 around the ventral cutout 43. On the other hand, in the diaper 1 of the present embodiment, since the top portion 43a of the ventral cutout portion 43 is provided on one side in the longitudinal direction from the locking end 1c1 of the fastening tape 10, there is no step and high rigidity. The fastening tape 10 is locked to the absorbent core 41. Therefore, the fastening tape 10 can be firmly locked and the fastening tape 10 can be prevented from coming off due to the deformation of the absorbent core 41.

  Moreover, in the diaper 1, a leg periphery opening part is formed in the site | part between the abdominal side flap 14 and the back side flap 13 at the time of wear. Therefore, in the second waistline 1c, particularly at the portion where the fastening tape 10 (hook sheet 12) is not locked, the base of the wearer's leg taking the positioning posture is the outermost side in the width direction of the ventral side flap 14 The end 14a is easily hooked to one end (center side) in the longitudinal direction (hereinafter, the ventral side flap end 141 (position d)), and is lifted to a position closer to the ventral side flap end 141.

  Therefore, in the diaper 1 of the present embodiment, the longitudinal direction is longer than the center (position e) of the third region A3 between the product center (position b) of the diaper 1 and the ventral side flap end 141 (position d). On the other side, that is, the fourth region A4 between the center (position e) of the third region A3 and the locking end 1c1 (position a), and on the more ventral region of the second region A2. The top part 43a of the side notch 43 is provided (the part with the narrowest width is provided among the parts of the absorber core 41 sandwiched between the pair of notch parts). By doing so, the absorber core 41 can easily follow the wearer's leg that is lifted to a position closer to the ventral side flap end 141. Moreover, the part which the part of the diaper 1 (absorbent body core) position near the ventral side flap end 141 receives from the wearer's leg (the force to shift the diaper 1 to the ventral side) It can relieve by 43 deformation | transformation and can reduce the pressure to a wearer.

  Moreover, the diaper 1 is also fixed to the wearer when the abdomen of the wearer and the end 41a on the other side in the longitudinal direction (abdomen side) of the absorbent core 41 are caught. Therefore, in the part of the second waistline portion 1c where the fastening tape 10 (hook sheet 12) is not locked, the base of the leg of the wearer who takes the positioning posture is on the other side in the longitudinal direction of the absorbent core 41. It is lifted to a position closer to the end 41a.

  Therefore, in the diaper 1 of the present embodiment, than the center (position g) of the fifth region A5 between the product center (position b) of the diaper 1 and the end 41a on the other side in the longitudinal direction of the absorber core 41, On the other side in the longitudinal direction, that is, the sixth region A6 between the center (position g) of the fifth region A5 and the locking end 1c1 (position a), and on the more ventral region of the second region A2. The top 43a of the ventral notch 43 is provided (the part having the narrowest width among the parts of the absorber core sandwiched between the pair of notches is provided). By doing so, the absorber core 41 can easily follow the wearer's leg lifted to a position closer to the end 41a on the other side in the longitudinal direction of the absorber core 41. Moreover, the force (the force which tries to shift the diaper 1 to the stomach side) which the site | part of the diaper 1 (absorber core) position near the edge 41a of the other longitudinal direction of the absorber core 41 receives from a wearer's leg. Moreover, it can relieve by the deformation | transformation of the ventral side notch part 43, and the pressure to a wearer can be reduced.

  5, the length (product length) of the diaper 1 in the longitudinal direction is the first length L1, and the top 43a of the ventral notch 43 from the end 1B on the other side of the diaper 1 in the longitudinal direction. The length in the longitudinal direction is the second length L2, and the ratio of the second length L2 to the first length L1 (L2 / L1 × 100) is variously changed as shown in FIG. An evaluation test was conducted. That is, the diaper 1 having the ratio of the second length L2 to the first length L1 as shown in FIG. 6 is actually worn by a low-weight child taking a positioning posture, and the fit of the diaper 1 is visually observed. A sex evaluation test was conducted. And when fit nature is good, for example, when absorber core 41 does not press a wearer's leg and absorber core 41 around a wearer's leg is not called, or between diaper 1 and a wearer When there was no gap, “◯” was assigned, whereas when the fit was poor, “X” was assigned.

  As a result, as shown in FIG. 6, when the ratio of the second length L2 to the first length L1 is 22%, 24%, and 26%, an evaluation that the fitting property is good was obtained. . Therefore, in the diaper 1 of the present embodiment, the ratio of the second length L2 to the first length L1 in the second region A2 closer to the locking end 1c1 of the fastening tape 10 than the product center (position b). Is 22% or more and 26% or less is provided with the top 43a of the ventral cutout 43 (the narrowest part of the absorbent core core sandwiched between the pair of cutouts) Is provided). By doing so, the absorber core 41 can be more easily along the wearer's leg taking a positioning posture, and the fit of the diaper 1 can be improved.

  Furthermore, in the diaper 1 of the present embodiment, the absorbent core 41 has a pair of dorsal notches 44 (another pair of notches) in addition to a pair of ventral notches 43 (a pair of notches). Part). Therefore, the site | part of the absorber core 41 between the ventral notch part 43 and the back side notch part 44, ie, the site | part of the absorber core 41 pinched | interposed into the leg (crotch part) of the wearer who takes a positioning posture. Deformation freedom can be increased. Therefore, a wearer's crotch tightening force can be relieved by the deformation | transformation of the absorber core 41, the pressure (repulsive force) to a wearer can be reduced, and wearing comfort can be improved.

In particular, in the diaper 1 of the present embodiment, the inner side in the width direction protrudes from the other side in the longitudinal direction from the pair of ventral notches 43 to one side in the longitudinal direction from the pair of dorsal notches 44. Both ends of the absorbent core 41 in the width direction are curved so that Therefore, the absorber core 41 is easier to follow along the base of the wearer's leg taking the positioning posture.

  Moreover, the site | part of the absorber core 41 around a pair of ventral notch part 43 and the site | part of the absorber core 41 around a pair of back side notch part 44 have low rigidity, and fold the diaper 1 in a longitudinal direction. It will be the folding base point. Therefore, the diaper 1 (absorber core 41) of the present embodiment is easily three-dimensionally formed along the wearer's body as shown in FIG. 7A. In other words, with a portion of the absorber core 41 between the pair of ventral cutouts 43 and the pair of dorsal cutouts 44 as the bottom, a portion on the ventral side of the pair of ventral cutouts 43 and a pair The back portion of the back side notch 44 tends to rise up. And as above-mentioned, it wears which takes the positioning attitude | position by providing the top part 43a of the ventral side notch part 43 in 2nd area | region A2 near the latching end 1c1 of the fastening tape 10 rather than the product center (position b). The diaper 1 can be folded at the front part of the base of the person's leg.

  On the other hand, as shown in FIG. 5, the product center (position b) is separated on both sides in the longitudinal direction by a length L4 (= L1 × 0.1) that is 10% of the longitudinal length L1 of the diaper 1. It is preferable to provide the top portion 44a of the dorsal notch 44 in the seventh region A7, that is, in the center of the longitudinal direction of the diaper 1 (most of the parts of the absorber core 41 sandwiched between the other pair of notches). It is good to provide the site | part which becomes narrow in width). By doing so, at the site behind the base of the wearer's leg that takes a positioning posture (in other words, at the site where the leg starts to rise by the positioning posture from the buttocks in contact with the ground of the wearer who lies on his back) You can fold the diaper 1.

  Therefore, the diaper 1 can be three-dimensionally molded so as to follow the body of the wearer taking the positioning posture. Therefore, the diaper 1 can be prevented from being forcibly pulled and worn along the positioning posture, and the pressure on the wearer by the diaper 1 can be reduced. Swelling can be suppressed. Moreover, it becomes difficult to produce a clearance gap between the diaper 1 and a wearer, and the leakage of excrement can be suppressed. However, the present invention is not limited thereto, and a back-side notch 44 may be provided on both sides in the longitudinal direction from the product center in a region separated from the length L4 that is 10% of the product length L1, and the absorber core 41 may not be provided with the dorsal cutout 44 but may be provided with the ventral cutout 43.

  Further, like the diaper 1 of the present embodiment, a pair of dorsal cutouts 44 from at least a pair of ventral cutouts 43 (ends 43b on the other side in the longitudinal direction in FIG. 7B) at both ends in the width direction. Within the range of the longitudinal direction up to (one end 44c on the one side in the longitudinal direction), there are provided a leg-stretchable stretchable member that expands and contracts in the longitudinal direction, that is, the leg-stretchable stretchable member 6 and the three-dimensional gather stretchable member 22. When it has, the diaper 1 curves to a longitudinal direction so that the skin side surface may become inside by the contraction force of an elastic member. Therefore, the diaper 1 can be rounded and three-dimensionally molded so that it can be easily along the body of the wearer taking a positioning posture. In general, both ends of the stretchable member are not fixed in an extended state and do not contribute to stretchability. Therefore, FIG. 1 shows only a portion of the stretchable member that contributes to stretchability. And it is preferable that the site | part of the elastic member which contributes to an elasticity exists over the range of the longitudinal direction from a pair of ventral notch part 43 to a pair of back side notch part 44. FIG. However, the present invention is not limited to this, and the diaper 1 having only one of the leg-holes stretchable member 6 and the stretchable member 22 for three-dimensional gathers or the diaper 1 having no stretchable member that stretches in the longitudinal direction may be used. .

  Furthermore, in the diaper 1 of the present embodiment, each shape of the ventral cutout portion 43 and the dorsal cutout portion 44 is a mountain shape. That is, as shown in FIG. 7B, among the cutout portions 43 and 44, the outer portion in the width direction is longer in the longitudinal direction than the inner portion, and the longitudinal direction of the top portions 43a and 44a. Is located between both ends in the longitudinal direction of the outer ends 431 and 441 in the width direction (between 43b and 43c, between 44b and 44c).

  Therefore, due to the contraction force of the leg-hole stretchable member 6 and the three-dimensional gather stretchable member 22, the cutout portions 43 and 44 are contracted in the width direction, and the cutout portions 43 and 44 are in the shape of being left. . As a result, as shown in FIG. 7A, a fold 45 along the width direction is formed between the pair of ventral notches 43, and a fold 46 along the width between the pair of dorsal notches 44. Is formed. In particular, the notch portions 43 and 44 have respective notch portions at the center portions (the center portions of 43b and 43c and the center portions of 44b and 44c) at both ends in the longitudinal direction of the outer ends 431 and 441 in the width direction. It is good to provide the position of the top parts 43a and 44a of 43 and 44 in the longitudinal direction. By doing so, the folds 45 and 46 can be formed beautifully so as to connect the pair of ventral cutouts 43 and the pair of dorsal cutouts 44, respectively. However, the shape of each notch part 43 and 44 is not restricted to this.

  And since the said folds 45 and 46 are formed in the natural state of the diaper 1, the diaper 1 becomes easy to fold on the basis of the folds 45 and 46, and follows the wearer's body which takes a positioning posture. It becomes easy to be three-dimensionally molded. Also, an assistant who wears the diaper 1 in a low-weight child can recognize that the diaper 1 has a shape that easily follows the positioning posture by visually checking the folding folds 45 and 46, and the diaper 1 can be adjusted in accordance with the positioning posture. Can be attached. However, the present invention is not limited to this, and the folds 45 and 46 may not be formed in the diaper 1 in the natural state.

  In the present embodiment, the absorptive notch 43 and the dorsal notch 44 have no absorbent material constituting the absorber core 41, and the absorber core 41 is completely notched. However, it is not limited to this. It is good also considering a site | part (for example, site | part which is 50% or less of the circumference | surroundings of a periphery) as a notch part where the fabric weight of an absorbent material is low compared with the circumference | surroundings. Also in this case, in the peripheral part of each notch part, since rigidity is low and a deformation | transformation freedom degree is high, the diaper 1 (absorbent body core 41) can be along with the wearer who takes a positioning attitude | position.

=== Modification ===
8 and 9 are schematic plan views of the diaper 1 in a modified example. In the above embodiment, the constricted portion (large cutout portion) of the absorbent core 41 is provided with the small chevron-shaped ventral cutout portion 43 and the dorsal cutout portion 44, but the present invention is not limited thereto. . For example, as illustrated in FIG. 8, the absorbent core 41 may be provided with only a small chevron-shaped ventral-side notch 43 and a back-side notch 44. That is, the width of the absorbent core 41 between the pair of ventral cutouts 43 and the pair of dorsal cutouts 44 is made longer than the pair of ventral cutouts 43 in the longitudinal direction. Or the width of the absorbent core 41 on one side in the longitudinal direction from the pair of back-side notches 44 may be made equal. In the diaper 1 for a low-weight child, the size of the absorbent core 41 is originally small, and even if the position of the leg changes depending on the positioning posture, the excretion position does not change so much, so the ventral notch 43 and the dorsal notch By not constricting the absorber core between the portions 44, the amount of excreta absorbed can be secured, and excrement leakage can be suppressed.

  The diaper 1 is also fixed to the wearer when the abdomen of the wearer and the end 1B on the other side in the longitudinal direction of the diaper 1 are hooked, and the base of the leg of the wearer is on the other side in the longitudinal direction of the diaper 1. It is lifted up to a position closer to the end 1B. Therefore, on the other side in the longitudinal direction from the center (position i) of the eighth region A8 between the product center (position b) of the diaper 1 and the end 1B (position h) on the other side in the longitudinal direction of the diaper 1, That is, you may provide the top part 43a of the ventral notch 43 in 9th area | region A9 between the center (position i) of 8th area | region A8, and the latching end 1c1 (position a).

  Further, in the second area A2 closer to the locking end 1c1 of the fastening tape 10 than the product center (position b) of the diaper 1, the position on the locking end 1c1 (position a) as shown in FIG. You may provide the top part 43a of the ventral side notch part 43 in the position on a center (position b).

  In addition, the absorbent core 41 is not limited to having a small notch having a chevron shape, and as shown in FIG. 9, a pair of notches 47 (hatched portions in the figure) that are long and gently cut in the longitudinal direction. You may just provide. Also in this case, the minimum width W1 of the parts of the absorber core 41 sandwiched between the pair of cutout portions 47 in the second region A2 closer to the locking end 1c1 of the fastening tape 10 than the product center (position b) It is good to provide the site. By doing so, the absorber core 41 can be along the leg of the wearer who takes a positioning posture.

  Moreover, as shown in FIG. 1, the diaper of the aspect 1 in which the cutting line 50 for cutting off the part to which the fastening tape 10 is fixed among the 1st waist parts 1a is formed in the unfolded state of the diaper 1 is shown. There may be. Moreover, the diaper of the following aspects may be sufficient.

The diaper according to aspect 1,
The cut line 50 is formed at each position on both sides in the width direction, corresponding to each fastening tape 10.
Each of the cut lines 50 extends from a portion serving as a waistline opening portion through a position on the inner side in the width direction of the first waistline portion 1a from the portion where the fastening tape 10 is fixed. The diaper of the aspect 2 characterized by being formed with the route | root extended toward the part used as an opening part.

The diaper according to aspect 1 or 2,
The cut line 50 has a plurality of through holes penetrating in the thickness direction,
The diaper according to aspect 3, wherein the plurality of through holes are arranged along a direction in which the cut line 50 should extend.

The diaper according to aspect 3,
The cut line 50 is a first cut line portion formed to extend inward in the longitudinal direction from a portion serving as a waistline opening,
A second cut line portion located at a position inside the longitudinal direction from the first cut line portion and located at the same position as the fastening tape 10 with respect to the longitudinal direction,
When comparing the ratio of the length of the through-hole per unit length in the direction in which the cut line 50 extends, the ratio of the second cut line portion is more than the ratio of the first cut line portion. The diaper of aspect 4 characterized by being small.

The diaper according to aspect 4,
The cut line 50 has a curved portion having a curved shape that is displaced outward in the width direction as it goes inward in the longitudinal direction at a position inside the longitudinal direction from the second cut line portion,
When the ratio of the length of the through hole per unit length in the direction in which the cut line 50 extends is compared, the ratio of the second cut line portion is smaller than the ratio of the curved portion. The diaper of aspect 5 characterized by the above.

A diaper according to any one of aspects 1 to 3,
The cut line 50 is linearly extending along the longitudinal direction from the portion serving as the waistline opening portion, and is located on the inner side in the longitudinal direction than the linear portion, and proceeds inward in the longitudinal direction. A diaper according to aspect 6, comprising: a curved portion having a curved shape displaced outward in the width direction.

The diaper according to aspect 6,
At each position on both sides in the width direction, leg-stretchable members 6 are provided along the longitudinal direction for contracting the portions that serve as the leg-hole openings in the longitudinal direction.
When the curvilinear portion is virtually divided into the waist opening portion and the leg opening portion, and when the leg stretchable member 6 is viewed from the thickness direction Moreover, the diaper of aspect 7 characterized in that the leg-hole stretchable member 6 intersects with the portion on the waistline opening portion side of the curved portion.

The diaper according to aspect 6 or 7,
The diaper has a plurality of sheets stacked in the thickness direction,
The diaper according to aspect 8, wherein the number of stacked sheets in at least a part of the curved portion is smaller than the number of stacked sheets in the linear portion.

A diaper according to any one of aspects 6 to 8,
The diaper has a resin film (back film 3) in which the stretching direction at the time of manufacture is along the longitudinal direction,
The diaper according to aspect 9, wherein the linear portion is formed on the resin film.

A diaper according to any one of aspects 1 to 9,
At each position on both sides in the width direction, sheet-like three-dimensional gathers 20 provided along the longitudinal direction are provided,
The three-dimensional gather 20 has a base end portion that cannot stand up in the thickness direction and a stand-up portion that can stand up on the skin side in the thickness direction with the base end portion as a fulcrum in the width direction. The upright portion stands up on the skin side in the thickness direction by the upright portion shrinking in the longitudinal direction based on the contraction force in the longitudinal direction acting on the skin,
The diaper according to aspect 10, wherein the cut line 50 is formed at a position on the outer side in the width direction with respect to the base end portion and the upright portion.

A diaper according to any one of aspects 1 to 10,
An absorber core 41 formed by laminating an absorbent material that absorbs liquid in the thickness direction, has a center in the width direction,
The diaper according to aspect 11, wherein the cut line 50 is formed at a position outside the absorbent core 41 in the width direction.

A diaper according to any one of aspects 1 to 11,
A cutting line (not shown) is formed along the longitudinal direction at the same position as the cut line 50 with respect to the position in the width direction in the portion of the second waist part 1c that becomes the waist opening. Unfoldable disposable diaper characterized.

  As mentioned above, the said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. Further, the present invention can be changed or improved without departing from the gist thereof, and needless to say, the present invention includes equivalents thereof.

1 (deployable disposable) diaper, 1a first waistline, 1b crotch, 1c second waistline, 2 topsheet, 3 back film, 4 absorbent body, 41 absorbent core, 42 covering material, 43 ventral side cut Notch part (a pair of notch part), 431 The outer end in the width direction, 43a
Top, 43b, 43c Longitudinal ends, 44 Back notch (other pair of notches), 441 Outer end in width direction, 44a Top, 44b, 44c Longitudinal ends, 45 Folding fold, 46 Crease, 47 pair of notches, 5 exterior sheet, 6 leg-stretchable member (stretchable member), 7 legs, 10 fastening tape, 11 base material, 12 hook sheet, 13 dorsal side flap, 14 ventral side Side flap (side flap), 20 three-dimensional gather, 21 three-dimensional gather sheet, 22 three-dimensional gather elastic member (elastic member), b product center, a, 1c1 fastening end of fastening tape, L1 first length, L2 second length, 50 tear line

Claims (9)

A deployable disposable diaper having a longitudinal direction and a width direction intersecting with each other, and a first waistline part, a crotch part, and a second waistline part arranged from one side of the longitudinal direction,
An absorbent core;
A pair of fastening tapes extending from the first waistline portion to both outer sides in the width direction,
The fastening tape includes a locking portion that is locked when worn,
The longitudinal direction in which the end of the crotch part in the longitudinal direction of the engaging portion provided on the fastening tape is located when the second waistline portion aligns the longitudinal ends of the disposable diaper. A fastening end of the fastening tape at the position of
The absorbent core has at least a pair of notches at both ends in the width direction,
In the longitudinal direction,
Of the region between the product center that is the center of the disposable diaper and the locking end, the absorption that is sandwiched between the pair of notches in the region between the center of the region and the locking end The part of the body core where the width is the narrowest is located,
In the longitudinal direction, when the opposite side to the one side is the other side,
In the position of the locking end in the longitudinal direction, the width of the absorber core is narrower than the width of the absorber core at the other end of the absorber core ,
The absorber core extends in the width direction of the absorber core such that the inner side in the width direction is convex from the other side of the pair of notches to the one side of the product center. A disposable diaper characterized in that both ends are curved . The disposable diaper according to claim 1,
The second waistline portion has a pair of side flaps extending from the crotch portion on both outer sides in the width direction,
In the longitudinal direction,
The pair of cuts in the region on the other side of the center between the product center and the one end in the longitudinal direction among the outermost ends in the width direction of the side flaps. The portion where the width becomes narrowest among the portions of the absorber core sandwiched between the notches is located,
A disposable diaper characterized by The disposable diaper according to claim 1 or 2,
In the longitudinal direction,
Of the part of the absorber core sandwiched between the pair of notches in the region on the other side rather than the center of the region between the product center and the other end of the absorber core. The part where the width is narrower is located,
A disposable diaper characterized by The disposable diaper according to any one of claims 1 to 3,
The length in the longitudinal direction of the disposable diaper is the first length,
From the other end in the longitudinal direction of the disposable diaper to the other end in the longitudinal direction of the portion of the absorber core sandwiched between the pair of notch portions that has the narrowest width When the length in the longitudinal direction is the second length,
The ratio of the second length to the first length is not less than 22% and not more than 26%;
A disposable diaper characterized by The disposable diaper according to any one of claims 1 to 4,
The absorbent core has another pair of notches on the one side in the longitudinal direction from the pair of notches,
A disposable diaper characterized by The disposable diaper according to claim 5,
The region of the absorbent core sandwiched between the other pair of notches in the region from the product center to 10% of the longitudinal length of the disposable diaper on both sides in the longitudinal direction. The part where the width is the narrowest is located,
A disposable diaper characterized by The disposable diaper according to claim 5 or 6,
Stretchable members that expand and contract in the longitudinal direction are provided at both ends in the width direction, at least within the range in the longitudinal direction from the pair of notches to the other pair of notches,
The shape of the notch is such that the outer portion in the width direction has a longer length in the longitudinal direction than the inner portion, and the position in the longitudinal direction of the top portion is the outer end in the width direction. A shape located between both ends in the longitudinal direction,
A disposable diaper characterized by A disposable diaper according to claim 7,
Between the pair of cutout portions and between the other pair of cutout portions, creases along the width direction are formed in the natural state of the disposable diaper,
A disposable diaper characterized by The disposable diaper according to any one of claims 5 to 8,
The width of the absorber core between the pair of notches and the other pair of notches is a width of the absorber core on the other side in the longitudinal direction from the pair of notches. , Being equal,
A disposable diaper characterized by

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