TWI517841B - Disposable diaper - Google Patents

Description

Disposable disposable diaper

The present invention relates to an unfolded disposable disposable diaper.

The disposable disposable disposable diaper generally has an absorbent body interposed between the liquid permeable sheet and the liquid impermeable sheet, and the two sides in the width direction from the waist portion covering the back side of the wearer The pair of buckles extending outwardly are locked to the wearer covering the waist portion of the wearer's abdominal side. Further, there is proposed a disposable disposable diaper in which the planar shape of the absorbent body is formed into an hourglass shape, that is, the end of the absorbent body in the wide direction is curved to form a convex shape toward the inner side in the wide direction, and The center of the disposable diaper in the longitudinal direction forms the widest and narrowest disposable disposable diaper of the absorbent body (see, for example, Patent Document 1).

[Advanced technical literature] [Patent Literature]

[Patent Document 1] JP-A-2002-253608

The absorbent body described in the above Patent Document 1 is relatively large, and is easily rooted at the base of the baby's leg which is asleep in a state in which the leg is stretched. However, the smaller baby is born in the posture of the baby, that is, since the leg is raised to the M-shaped posture in which the knees are located on the abdomen, the root of the leg is located in the abdomen. Therefore, as described in the above Patent Document 1, the absorbent body having the narrowest center in the longitudinal direction of the disposable disposable diaper is less likely to follow the root portion of the baby's leg when the posture is taken in the tire. As a result, the absorbent body having high rigidity causes a feeling of pressure to the wearer, or a gap is formed between the disposable diaper and the wearer after use, and the excrement is leaked.

The present invention has been made in view of the above problems, and an object thereof is to provide a disposable disposable disposable diaper which is easy to follow the body of a baby when it is placed in a tire.

The main invention for achieving the above object is a disposable disposable diaper having a longitudinal direction and a wide width direction which intersect each other, and the first waist portion, the crotch portion, and the second waist portion are in the longitudinal direction. An unfolded disposable diaper having an unfolded type arranged on one side, comprising: an absorbent core; and a pair of buckles extending from the first waist portion toward both outer sides in the width direction, the first The waist portion is aligned with the both ends of the disposable diaper in the longitudinal direction, and is in front of the buckle The end portion of the crotch portion in the longitudinal direction has a locking end of the buckle at a position in the longitudinal direction, and the absorbent core has a pair of notches at both ends in the width direction, and the absorbent core The other one of the pair of notch portions has a pair of notch portions on the one side in the longitudinal direction, and in the longitudinal direction, the portion of the absorbent body core that is sandwiched by the pair of notch portions is The narrowest portion of the width change is located in the region between the center of the product as the center of the disposable disposable diaper and the aforementioned locking end, between the center of the region and the aforementioned locking end. In the region, in the longitudinal direction, the narrowest portion of the portion of the absorbent core sandwiched by the other pair of notch portions is positioned to be smaller than the disposable diaper. The center of the product center is located further on the other side opposite to the one side.

Other features of the present invention will become apparent from the description and appended claims.

According to the present invention, it is possible to provide a deployable disposable disposable diaper which is easy to follow the body of a baby when it is placed in the tire.

1‧‧‧ (discarded disposable) diapers

1a‧‧‧1st waist circumference

1b‧‧‧胯 lower part

1c‧‧‧2nd waist circumference

2‧‧‧ top sheet

3‧‧‧Back film

4‧‧‧Acceptor

41‧‧‧Absorbing body core

42‧‧‧Covered timber

43‧‧‧ Ventral notch (notched part)

431‧‧‧The outer end of the wide direction

43a‧‧‧ top

43b, 43c‧‧‧ both ends of the long direction

44‧‧‧ Back side notch (other pair of notch)

441‧‧‧The outer end of the wide direction

44a‧‧‧ top

44b, 44c‧‧‧ both ends of the long direction

45‧‧‧ crease

46‧‧‧ crease

47‧‧‧ a pair of notches

5‧‧‧Outer sheets

6‧‧‧Right stretch members (stretchable members)

7‧‧‧ legs

10‧‧‧ buckle

11‧‧‧Substrate

12‧‧‧ hook sheet

13‧‧‧Back side flaps

14‧‧‧ Ventral flanks (flank)

20‧‧‧Three-dimensional folding

21‧‧‧Three-dimensional folded sheets

22‧‧‧Flexible members for three-dimensional hemming (stretchable members)

b‧‧‧Product Center

a, 1c1‧‧‧ buckle end of the buckle

L1‧‧‧1st length

L2‧‧‧2nd length

50‧‧‧cut line

Fig. 1 is a schematic plan view of the skin side of a wearer of a disposable diaper.

2A and 2B are cross-sectional views of the disposable diaper of the position AA and the position BB of Fig. 1.

[Fig. 3] Fig. 3A is a posture of a baby whose body weight is larger than 3000 g FIG. 3B and FIG. 3C are explanatory diagrams of postures of low birth weight infants.

Fig. 4 is an explanatory view of a position provided on a front side cutout portion of the absorbent core.

Fig. 5 is an explanatory view of a position provided on a front side cutout portion of the absorbent core.

Fig. 6 is a table showing the results of an evaluation test in which the position in the longitudinal direction of the ventral notch portion is shifted.

Fig. 7A is a schematic perspective view of a disposable diaper, and Fig. 7B is an explanatory view of a shape of a front side cutout portion and a back side cutout portion.

Fig. 8 is a schematic plan view of a disposable diaper in a modification.

Fig. 9 is a schematic plan view of a disposable diaper in a modification.

[Formation for carrying out the invention]

At least the following matters can be understood from the description of the specification and the accompanying drawings.

A disposable disposable diaper having a longitudinal direction and a wide width direction which intersect each other, and the first waist portion, the crotch portion, and the second waist portion are arranged from the one side in the longitudinal direction, that is, A disposable diaper comprising: an absorbent core; and a pair of buckles extending from the first waist portion toward the outer sides in the width direction, wherein the second waist portion is aligned When the both ends of the disposable diaper in the longitudinal direction are provided, the end portion of the crotch belt in the longitudinal direction of the crotch portion has a locking end of the buckle, and the absorbent core is The both ends of the wide direction have at least a pair of notches, and in the longitudinal direction, the narrowest portion of the portion of the absorber core sandwiched between the pair of notches is located at the narrowest portion Disposable disposable paper In the region between the center of the product of the diaper and the aforementioned locking end, the region between the center of the region and the aforementioned locking end.

According to the disposable disposable diaper, the notch portion of the absorbent core (the wide narrow portion of the absorbent core) can be provided at the position of the wearer's foot in the posture at the time of the tire, that is, The portion of the absorbent core having a high degree of freedom of deformation is provided, so that the absorbent core is easily along the wearer's leg. Therefore, the pressure on the wearer by the absorbent core is reduced, so that the gap is less likely to be generated between the disposable diaper and the wearer after use, and the leakage of the excrement can be suppressed.

In the disposable disposable diaper, the second waist portion has a pair of side flaps extending outward from the crotch portion on both outer sides in the width direction, and the pair of notches are formed in the longitudinal direction. The narrowest portion of the portion of the absorber core to be sandwiched is the one side in the longitudinal direction of the outermost end of the width direction of the center of the product and the side flap The center of the area between the ends is located more in the area on the other side of the foregoing.

According to such disposable disposable diapers, the absorbent core is easily along the legs of the wearer that is lifted to a position closer to the side flaps.

In the disposable diaper according to the above aspect, the narrowest portion of the portion of the absorbent core sandwiched by the pair of notch portions in the longitudinal direction is located at the center of the article. The center of the region between the end of the other side of the absorber core and the other side is located on the other side.

According to such disposable disposable diapers, the absorbent core is easily worn along the wearer's position that is raised closer to the end of the other side of the absorbent core. leg.

A disposable disposable diaper having the length in the longitudinal direction of the disposable disposable diaper as the first length, and the other side of the longitudinal direction of the disposable disposable diaper When the length in the longitudinal direction of the other end of the long side in the narrowest portion of the portion of the absorbent core that is sandwiched by the pair of notch portions is the second length The ratio of the second length to the first length is 22% or more and 26% or less.

According to such disposable disposable diapers, the absorbent core is easily along the wearer's legs in a posture when taken in the tire.

In the disposable disposable diaper, the absorbent core has another pair of notched portions on the one side in the longitudinal direction than the pair of notched portions.

According to the disposable disposable diaper, it is possible to provide a portion of the absorbent core between the pair of notched portions of the wearer's crotch portion in the posture at the time of the tire, that is, it can be set The portion of the absorber core having a high degree of freedom of deformation can be used to relieve the wearer's crotch binding force by the deformation of the absorber core. Further, each of the pair of notched portions serves as a folding base point in the longitudinal direction of the disposable disposable diaper, and the disposable disposable diaper can be formed three-dimensionally along the wearer's body.

In the disposable disposable diaper, the narrowest portion of the portion of the absorbent core sandwiched by the other pair of notch portions is located from the center of the article to the aforementioned 10% of the length in the longitudinal direction of the disposable disposable diaper on both sides in the long direction The area up to the length.

According to such a disposable disposable diaper, the other pair of notched portions are at the rear side of the root portion of the wearer's leg when the posture is taken in the tire, and the disposable diaper can be used after use. Stereoscopic formation of the wearer's body along the posture when taken in the tire

In a disposable disposable diaper, the both ends of the wide direction are provided at least in the longitudinal direction of the pair of notch portions to the other pair of notched portions. The stretchable member that expands and contracts in the longitudinal direction has a shape in which the outer portion of the wide direction is longer than the length of the inner portion in the longitudinal direction, and the position of the top portion in the longitudinal direction is at the aforementioned width. The shape between the both ends of the aforementioned long direction in the outer end of the web direction.

According to such a disposable disposable diaper, a crease along the width direction is formed between the notched portions of each pair, and the disposable diaper is worn along the posture when taken in the tire after use. The body of the person is more easily formed in three dimensions.

A disposable disposable diaper in which the natural state of the discarded disposable diaper is formed along the width direction between the pair of notch portions and the other pair of notched portions. Creases.

According to such a disposable disposable diaper, the disposable disposable diaper is more easily formed into a three-dimensional shape along the wearer's body in a posture in the tire, and the disposable diaper is attached to the low-weight child. The assistant also recognizes the crease and allows the disposable diaper to be installed along the posture in the tire.

Disposable disposable diaper, wherein the aforementioned pair The width of the absorber core between the notch portion and the other pair of notch portions is equal to the width of the pair of notch portions and the width of the absorber core on the other side in the longitudinal direction.

According to such a disposable disposable diaper, the absorbent core can be placed along the wearer's leg in a posture when it is placed in the tire, and the amount of excretion absorbed can be ensured.

===Simplified composition of disposable disposable diapers ===

The disposable disposable diaper of the present embodiment is particularly suitable for an unfolded disposable diaper (hereinafter, a disposable diaper) of an infant (hereinafter, low birth weight) having a body weight of 3000 g (g) or less, specifically It is suitable for low birth weight infants weighing less than 2500g, very low birth weight infants weighing less than 1500g, and ultra low birth weight infants weighing less than 1000g.

Fig. 1 is a schematic plan view of a skin side (inside) of a wearer's disposable diaper 1 in a stretched state, and Fig. 2A and Fig. 2B are cross-sectional views of the disposable diaper 1 at a position AA and a position BB of Fig. 1 . The disposable diaper 1 has a long direction, a wide direction, and a thickness direction which cross each other (orthogonal in this embodiment), and the first waist portion 1a, the crotch portion 1b, and the second waist portion 1c are long. One side is arranged. In general, the first waist portion 1a covers the back side portion of the wearer, and the second waist portion 1c is worn to cover the wearer's abdominal side portion, but may be reversely worn.

As shown in FIG. 2, the disposable diaper 1 has the absorber 4 between the liquid-permeable top surface sheet 2 and the liquid-impermeable back surface film 3. The absorber 4 is an absorbent core 41 which is extended from the first waistline portion 1a to the second waistline portion 1c in the longitudinal direction and has an absorbent material (for example, pulverized pulp or superabsorbent polymer) which absorbs and retains excrement. And a liquid-permeable covering material 42 (for example, a thin paper sheet or a spunbonded nonwoven fabric) coated with this liquid. Moreover, an exterior sheet 5 (for example, a nonwoven fabric) which becomes an outer casing of the entire disposable diaper 1 is provided on the non-skin side of the back surface film 3. In addition, in order to improve the fit of the waistline, for example, a stretchable member (for example, a stretchable sheet member or a filament-shaped stretchable member) that can expand and contract in the wide direction may be provided in the first waistline portion 1a. .

Moreover, as shown in FIG. 1, the planar shape of the absorber 4 (coated material 42) is a rectangle. On the other hand, the absorbent core 41 is narrowed at a part of both ends in the wide direction, and has a small pair of ventral notches in the narrowed portion, that is, in a pair of large notches. The portion 43 and the pair of back side cutout portions 44. The front side cutout portion 43 and the back side cutout portion 44 are regions in which the absorbent core constituting the absorbent core 41 does not exist. Further, the pair of the front side cutout portions 43 are formed in parallel in the wide direction at the same position in the longitudinal direction, and the pair of back side cutout portions 44 are positioned further in the longitudinal direction than the pair of the left side cutout portions 43. One side (back side) is formed in parallel in the wide direction at the same position in the long direction. That is, the absorbent core 41 is formed in a shape that is symmetrical in the wide direction. Further, in the present embodiment, the depths in the width direction are set to be substantially equal to each other in the front side cutout portion 43 and the back side cutout portion 44, but the depth in the width direction may be different.

The first waistline portion 1a has a pair of rear side flaps 13 extending further than the crotch portion 1b on both outer sides in the width direction, and the second waistline portion 1c A pair of ventral side flaps 14 (flanks) extending further than the crotch portion 1b are also provided on both outer sides in the width direction. Each of the side flaps 13 and 14 is formed by laminating the back film 3 and a three-dimensional folded sheet 21 which will be described later. Further, the pair of buckles 10 extend from the pair of back side flaps 13 (the first waistline portion 1a) toward both outer sides in the width direction.

The buckle 10 has a base material 11 and a hook sheet 12, and a hook sheet 12 is provided on the skin side surface in the thickness direction of the base material 11. When the hook sheet 12 is folded toward the second waist portion 1c side, it faces the outer sheet 5 (non-skin side surface) of the second waist portion 1c and is locked to the exterior sheet 5. Therefore, the hook sheet 12 (for example, a sheet of a public material including a flat fastener) has a structure in which the exterior sheet 5 (for example, a non-woven fabric) is closable and detachable. Further, the hook sheet 12 is not limited to being directly locked to the exterior sheet 5. For example, a target sheet of the hook sheet 12 (for example, a sheet having a base material of a flat fastener) may be provided on the exterior sheet 5, and The target sheet locks the hook sheet 12.

Further, when the disposable diaper 1 is attached, first, the side pad is folded in the longitudinal direction after the wearer, and then the pair of back side flaps 13 are folded to the inner side in the width direction, and the outer side of the second waistline portion 1c is folded. The sheet 5 locks a pair of buckles 10 . As a result, a waist opening portion and a pair of leg circumference opening portions are formed.

Further, at both end portions in the width direction of the disposable diaper 1, a leg-surrounding member 6 that can expand and contract in the longitudinal direction is provided. The leg-surrounding member 6 is fixed between the surface sheet 2, the three-dimensional folded sheet 21, and the back film 3 in a state of being elongated in the longitudinal direction. Therefore, in the natural state In the disposable diaper 1, the leg-surrounding member 6 is contracted, and a leg-surrounding hem is formed on the peripheral portion of the leg-opening, and is attached to the wearer's leg circumference.

Further, in the present embodiment, the leg-stretchable member 6 is used as a filament-shaped stretchable member (for example, a filament-like urethane stretchable fiber or a filament-like natural rubber) at each end portion of the disposable diaper 1 in the width direction. Although the two stretchable members 6 are arranged side by side in the wide direction, the number of the leg stretchable members 6 is not limited to this. Moreover, the leg-surrounding elastic member 6 may be used as a stretchable sheet member (for example, a film-shaped stretchable film is formed of a molten thermoplastic elastomer resin, and a stretchable fiber is used to form a stretchable nonwoven fabric).

Moreover, a pair of three-dimensional folded edges 20 that rise toward the skin side (wearer side) are provided at both end portions of the disposable diaper 1 in the width direction. Each of the three-dimensional folded edges 20 is a three-dimensional folded sheet 21 and a stretchable member 22 for three-dimensional hemming. As shown in FIG. 2, the three-dimensional folded sheet 21 coincides with the outer end of the outer sheet 5 in the width direction. On the other hand, the inner end portion of the three-dimensional folded sheet 21 in the width direction is folded to the side of the top sheet 2 (non-skin side), and the three-dimensional folded sheet 21 is used for three-dimensional folding. The stretchable member 22 (one filament-shaped stretchable member in the present embodiment) is fixed in the longitudinal direction in an elongated state. Further, although not shown, both end portions of the three-dimensional folded sheet 21 in the longitudinal direction may be joined to the top sheet 2 by an adhesive or the like. Further, a portion of the three-dimensional folded sheet 21 which is located outside the wide-width direction at both end portions in the longitudinal direction is joined to the top sheet 2 from one end to the other end in the longitudinal direction, and the joint portion thereof The end portion is the starting point of the three-dimensional folded edge 21 which is raised by the contraction of the elastic member 22 for the three-dimensional hemming.

Further, the disposable diaper 1 of the present embodiment is used for low birth weight. Therefore, the product is elongated to a state in which no wrinkles are formed, and specifically, the size of a member constituting the disposable diaper 1 (for example, the outer sheet 5) is elongated to a state in which the size of the member alone is equal to or close to the length of the member. Set to the following values. In the long-term direction, the product length in the long direction is in the range of 210 to 330 mm, and more specifically, the product length is less than 2,500 g, and the product length is set to 310 mm, and the product is less than 1500 g. The length is 270 mm, and the length of the product for weighing less than 1000 g is set to 230 mm. The waist size (the circumference of the waist opening) is in the range of 160 to 295 mm. In detail, the waist size for the weight less than 2500 g is set to 273.5 mm, and the waist size for the weight less than 1500 g is set to 220 mm. . In the waist size, when the stretchable member is provided on the waist, the distal end of one of the buckles 10 in the width direction is bonded to the end of the hook sheet 12 of the other buckle 10 in the width direction. In the state of the portion, the size of the state in which the product is elongated in the wide direction.

===Special problems for low birth weight ===

Fig. 3A is an explanatory diagram of a posture of a baby whose body weight is larger than 3000 g, and Fig. 3B and Fig. 3C are explanatory diagrams of a posture of a low birth weight infant.

For example, an infant having a body weight of more than 3000 g is often taken as a posture in which the leg (thigh) 7 is stretched as shown in FIG. 3A. Therefore, the center portion (the oblique line portion in the drawing) of the disposable diaper 1 in the longitudinal direction is sandwiched between the legs 7 (the inter-turn portion). Therefore, in the center portion in the longitudinal direction of the disposable diaper, for example, the end of the absorbent core in the width direction is convexly curved toward the inner side, that is, at the 1. The second waist portion 1a, 1c widens the width of the absorbent core, and the width of the absorbent core is made narrowest at the center in the long direction, allowing the absorbent core to follow the legs of the baby having a body weight greater than 3000g. The root of 7.

On the other hand, for example, the reason why the low-weight child having a body weight of 3000 g or less is stable from breathing or the like is as shown in FIG. 3B and FIG. 3C, and the posture in the tire is taken, that is, the leg 7 is lifted to the knees and close to the abdomen. There are many cases of the M-shaped posture of the part (hereinafter, the positioning posture). Therefore, the leg 7 is sandwiched between the region on the ventral side (the oblique line portion in the drawing) of the center portion in the longitudinal direction of the disposable diaper 1, that is, the leg 7 is sandwiched between the second waistline portion 1c covering the abdomen.

Therefore, even if the low-weight child adopting the positioning posture wears the above-described disposable diaper suitable for the posture of the infant having a larger body weight than 3000 g (that is, the width of the absorbent core of the second waist portion 1c is wide, and the width of the absorbent core is wide. The center of the web becomes the narrowest paper diaper in the center of the long direction, and the absorbent core does not follow the root of the leg 7. Further, a portion where the leg 7 is sandwiched between the wide and wide absorbent cores of the second waist portion 1c is formed. Therefore, the highly absorbing absorbent core causes a feeling of pressure on the wearer's leg, or the absorbent core is twisted, and a gap is formed between the disposable diaper and the wearer after use, so that the excrement easily leaks. Further, the portion where the rigidity of the absorber core is lowered by the notch portion may be located at the center of the wearer's crotch portion, that is, there may be a position where the crotch portion has a strong binding force, and such a In the case, the absorption core becomes easy to twist.

Here, in the present embodiment, it is an object of providing a disposable diaper 1 that is easy to follow the body of a low-weight child who takes a positioning posture.

=== absorption core ===

4 and 5 are explanatory views of the position of the abdominal notch portion 43 provided in the absorbent core 41. FIG. 6 is a table showing the results of an evaluation test in which the position in the longitudinal direction of the front side cutout portion 43 is shifted. 7A is a schematic perspective view of the disposable diaper 1, and FIG. 7B is an explanatory view of the shape of the front side cutout portion 43 and the back side cutout portion 44.

The buckle 10 (hook sheet 12) is usually aligned with the both ends 1A and 1B in the longitudinal direction of the disposable diaper 1, and the buckle 10 is folded in parallel toward the inner side in the width direction, and is engaged with the buckle. 10 is the periphery of the portion of the second waist portion 1c that faces each other. In the present embodiment, when the both ends 1A and 1B of the longitudinal direction of the disposable diaper 1 are aligned, the end 10a (12a) of the center side (the lower portion 1b) of the buckle 10 (hook sheet 12) is formed. The position in the longitudinal direction (the position a in FIG. 4) is the locking end 1c1 of the buckle 10 of the second waistline portion 1c. In other words, when the length in the longitudinal direction of the end 1A of the long side of the disposable diaper 1 to the end 10a (12a) of the center side of the buckle 10 (hook sheet 12) is L3, the length of the disposable diaper 1 is long. The position at which the end 1B of the other side is separated from the center side in the longitudinal direction by only the length L3 becomes the locking end 1c1 of the buckle 10.

Further, when the end portions 10a and 12a on the center side in the longitudinal direction do not coincide with the hook sheet 12, the position of the end 12a on the center side in the longitudinal direction of the hook sheet 12 serves as the locking end 1c1. Further, the shape of the hook sheet 12 (the buckle 10) is not limited to a rectangular shape, and may be, for example, a trapezoidal shape. In this case, the end 12a of the hook sheet 12 on the center side in the longitudinal direction is inclined with respect to the width direction. Therefore, in the end 12a of the longitudinal direction center side of the hook sheet 12, the outermost side in the long direction The position of the portion serves as the locking end 1c1.

In the disposable diaper 1 of the present embodiment, as shown in FIG. 4, the top portion 43a of the front side cutout portion 43 is located at the center of the product (position b) which is the center of the longitudinal direction of the disposable diaper 1, and the locking end 1c1. The center (position c) of the longitudinal direction of the first area A1 in the first area A1 between the positions (a) and the second area A2 between the locking end 1c1 (position a).

In other words, in the portion (the oblique line portion in FIG. 7B) of the absorber core 41 sandwiched between the pair of the front side cutout portions 43, the narrowest portion is located in the second region A2. Further, in the present embodiment, the positions of the top portions 43a of the pair of the front side cutout portions 43 in the longitudinal direction may be the same, but may be shifted. In this case, the portion of the absorbent body core 41 that is held by the pair of the front side cutout portions 43 is a longitudinal direction in which the both ends 43b and 43c (see FIG. 7B) in the longitudinal direction of one of the front side cutout portions 43 are located. The range and the range in the longitudinal direction in which the both ends 43b and 43c of the other side of the abdominal notch portion 43 in the longitudinal direction are located are the portions of the absorbent core 41 that are located in the overlapping region.

As described above, in the disposable diaper 1 of the present embodiment, the front side notch portion 43 is located closer to the locking end 1c1 of the buckle 10 than the center of the product (position b). The disposable diaper 1 is mainly fixed to the wearer with a buckle 10 (hook sheet 12). Therefore, the root of the wearer's leg in the positioning posture is lifted to a position close to the locking end 1c1 of the buckle 10. Here, the front side cutout portion 43 is provided in the second region A2 of the buckle 10 near the locking end 1c1, and the abdominal side cutout portion 43 can be provided at the position of the root portion of the wearer's leg in the positioning posture.

The absorber core 41 around the front side cutout portion 43 is narrow and narrow, and has lower rigidity than other portions, and has high degree of freedom of deformation. Therefore, the abdominal notch portion 43 is provided at the position of the root of the wearer's leg in the positioning posture, and the absorbent body core 41 is easily along the root of the wearer's leg. Therefore, the wearer is likely to take a positioning posture because the pressure of the absorbent core 41 on the wearer's leg is reduced. In other words, the buckle 10 is fixed to the wearer's disposable diaper 1, and the deformation of the ventral notch 43 can be used to relieve the force from the leg to be positioned (the force to move the disposable diaper 1 to the ventral side) And can reduce the pressure on the wearer. Therefore, the wearing feeling of the disposable diaper 1 is improved, and the edema of the wearer can be suppressed. Further, since the offset of the absorbent core 41 is suppressed, the gap between the disposable diaper 1 and the wearer is less likely to occur, so that leakage of excrement can be suppressed.

However, if the top portion 43a of the front side cutout portion 43 is provided on the other side (ventral side) which is located further in the longitudinal direction than the locking end 1c1 of the buckle 10, the ventral notch portion is formed at the locking position of the buckle 10 The probability of the step (thickness difference) of the absorbent core 41 caused by 43 becomes high. As a result, the locking force of the buckle 10 is weak, or the buckle 10 is easily detached due to deformation of the absorbent core 41 around the abdominal cutout portion 43. On the other hand, in the disposable diaper 1 of the present embodiment, since the top portion 43a of the front side cutout portion 43 is provided on the side closer to the longitudinal direction than the locking end 1c1 of the buckle 10, there is no step or rigidity. The portion of the high absorbent core 41 locks the buckle 10 . Therefore, the buckle 10 can be firmly locked, and the buckle 10 can be prevented from falling off due to the deformation of the absorbent core 41.

Also, in the disposable diaper 1, when worn, the flank flank 14 and the back A leg-surrounding portion is formed at a portion between the side flaps 13. Therefore, in the second waist circumference 1c, particularly in the portion where the buckle band 10 (hook sheet 12) is not locked, the root portion of the wearer's leg in the positioning posture is easily hooked to the outermost side in the width direction of the abdominal side flap 14. The end of one end (center side) in the longitudinal direction of the end 14a (hereinafter referred to as the ventral side flap end 141 (position d)) is easily raised to a position closer to the ventral side flap end 141.

Here, the disposable diaper 1 of the present embodiment is located more at the center (position e) of the product area (position b) of the disposable diaper 1 and the third area A3 between the front side flap end 141 (position d). The other side in the longitudinal direction, that is, the fourth region A4 between the center (position e) of the third region A3 and the locking end 1c1 (position a), and the region on the ventral side of the second region A2 The top portion 43a of the front side indentation 43 (the portion where the absorbent core 41 held by the pair of notched portions is the narrowest portion is the narrowest portion). As such, the absorbent body core 41 tends to follow the wearer's leg that is raised to a position closer to the ventral side wing end 141. Further, the portion of the disposable diaper 1 (absorbent core) near the position of the front side flap end 141 can be relieved by the deformation of the front side cutout portion 43 from the wearer's leg (to move the disposable diaper 1 to The force on the ventral side) can reduce the pressure on the wearer.

Further, the disposable diaper 1 can be fixed to the wearer even if it is caught by the wearer's abdomen and the end 41a of the other side (ventral side) of the absorbent core 41 in the longitudinal direction. Therefore, in the second waistline portion 1c, in particular, the portion of the wearer's leg that is in the positioning posture is raised to a position closer to the other side in the longitudinal direction of the absorbent core 41, in the portion where the buckled band 10 (hook sheet 12) is not locked. The position of the end 41a of the side.

Here, the disposable diaper 1 of the present embodiment is at the center of the fifth region A5 between the center (the position b) of the disposable diaper 1 and the end 41a on the other side in the longitudinal direction of the absorbent core 41 ( The position g) is located further on the other side in the long direction, that is, in the sixth region A6 between the center (position g) of the fifth region A5 and the locking end 1c1 (position a), and is closer to the second region A2 than In the region on the ventral side, the top portion 43a of the abdominal indentation 43 is provided (the portion where the width of the absorbent body sandwiched by the pair of notched portions is the narrowest portion). As a result, the absorbent core 41 easily moves along the leg of the wearer that is lifted closer to the end 41a of the other side of the absorbent core 41 in the longitudinal direction. Further, the portion of the disposable diaper 1 (absorbent core) which is close to the end 41a of the other end side of the absorbent core 41 in the longitudinal direction can relieve the force received from the wearer's leg by the deformation of the abdominal notch portion 43. (The force to move the disposable diaper 1 to the ventral side) can reduce the compression of the wearer.

Further, as shown in Fig. 5, the length (length of the product) of the disposable diaper 1 is taken as the first length L1, and the length 1B of the other side in the longitudinal direction of the disposable diaper 1 is the length of the top 43a of the front side notch 43. As the length of the direction is the second length L2, as shown in FIG. 6, the ratio of the second length L2 to the first length L1 (L2/L1×100) is varied and the evaluation test is performed. In other words, the disposable diaper 1 having the ratio of the second length L2 to the first length L1 as shown in FIG. 6 is actually worn in a low-weight body in a positioning posture, and the adhesiveness of the disposable diaper 1 is visually observed. Evaluation test. Then, when the fit is good, for example, the absorbent core 41 does not press the wearer's leg, and the absorbent core 41 around the wearer's leg is not twisted. At the time, when the gap between the disposable diaper 1 and the wearer is not generated, it is regarded as "○", and when the difference is poor, it is regarded as "x".

As a result, as shown in FIG. 6, when the ratio of the second length L2 to the first length L1 is 22%, 24%, or 26%, it is possible to obtain an evaluation that the adhesion is good. Here, in the second diaper 1 of the diaper 1 of the present embodiment, the ratio of the second length L2 to the first length L1 is 22 in the second region A2 closer to the locking end 1c1 of the buckle 10 than the center (position b) of the product. In the position of 26% or less, the top portion 43a of the front side cutout 43 (the narrowest portion in which the width of the absorber core sandwiched by the pair of notch portions is widened) is provided. As a result, the absorbent core 41 is more likely to improve the fit of the disposable diaper 1 along the wearer's legs in a positioning posture.

Further, in the disposable diaper 1 of the present embodiment, the absorbent body core 41 has a pair of back side cutout portions 44 in addition to the pair of the front side cutout portions 43 (a pair of notch portions) (other pairs of Notch). Therefore, the portion of the absorbent core 41 between the front side cutout portion 43 and the back side cutout portion 44 can be raised, that is, the absorption of the wearer's leg (the inter-turn portion) in the positioning posture can be improved. The degree of freedom of deformation of the portion of the body core 41. Therefore, the deformation of the absorbent core 41 can alleviate the wearer's crotch restraining force, and the compression (resistance) against the wearer can be reduced, and the wearing feeling can be improved.

In the disposable diaper 1 of the present embodiment, both ends of the absorbent core 41 in the width direction are more than one side of the pair of the side cutout portions 43 in the longitudinal direction, and more than the pair of back side cutout portions 44. Located in the long direction The other side is curved to form a convex shape on the inner side in the width direction. Therefore, the absorbent core 41 is more likely to follow the root of the wearer's leg in a positioning posture.

Further, the portion of the absorbent core 41 around the pair of the front side cutout portions 43 and the portion of the absorbent core 41 around the pair of back side cutout portions 44 have low rigidity and become the folding base point of the folded diaper 1 in the long direction. . Therefore, the disposable diaper 1 (absorbent core 41) of this embodiment is three-dimensionally formed along the body of the wearer as shown in Fig. 7A. In other words, the portion on the ventral side of the pair of the abdominal notch portions 43 and the back portion on the back side of the pair of the back side notch portions 44 are likely to be a pair of the ventral notch portions 43 and the pair of back portions. The portion of the absorber core 41 between the side cutout portions 44 has a shape in which the bottom portion is raised. Further, as described above, the top portion 43a of the abdominal notch portion 43 is provided in the second region A2 closer to the locking end 1c1 of the buckle 10 than the center of the product (position b), and the wearer's leg in the positioning posture can be taken. The diaper 1 is folded on the front side of the root.

On the other hand, as shown in Fig. 5, only the length L4 (= L1 × 0.1) of 10% of the length L1 in the longitudinal direction of the disposable diaper 1 is separated from the center of the product (position b) toward both sides in the longitudinal direction. In the region A7, that is, the top portion 44a of the back side cutout portion 44 is provided substantially at the center of the longitudinal direction of the disposable diaper 1. (The width of the portion of the absorbent core 41 sandwiched by the other pair of notch portions is changed. The narrowest part can be). In this way, the position on the rear side of the root of the wearer's leg in which the positioning posture is taken (in other words, the portion from the back of the wearer's buttocks contacting the ground by the positioning posture to raise the leg) can be Folded paper diaper 1.

Therefore, the disposable diaper 1 can be further taken along the positioning posture The wearer's body is three-dimensionally shaped. Therefore, it is possible to prevent the disposable diaper 1 from being pulled up and attached in a positioning posture, and to reduce the pressure on the wearer of the disposable diaper 1, so that the wearing feeling of the disposable diaper 1 can be improved, and the wearer can be suppressed. Puffiness. Moreover, the gap between the disposable diaper 1 and the wearer is less likely to occur, and leakage of excrement can be suppressed. However, the present invention is not limited thereto, and the back side notch portion 44 may be provided in a region in which the length from the center of the product in the longitudinal direction is more than 10% of the length L4 of the product length L1. Further, the absorbent core 41 may not be provided with the back. The side cutout portion 44 is provided with only the front side cutout portion 43.

Further, the disposable diaper 1 of the present embodiment has at least a pair of the front side notch portions 43 (the end 43b on the other side in the longitudinal direction of FIG. 7B) at both end portions in the wide direction to the pair of back side notches. In the longitudinal direction of the portion 44 (the end 44c in the longitudinal direction), a leg-surrounding member that expands and contracts in the longitudinal direction is provided, that is, the leg-surrounding member 6 and the stretchability for the three-dimensional hemming are provided. In the case of the member 22, the disposable diaper 1 is bent in the longitudinal direction by the contraction force of the elastic member, and the side surface of the skin becomes the inner side. Therefore, the disposable diaper 1 can be formed in a three-dimensional shape in a circular shape along the wearer's body in a positioning posture. Further, generally, both ends of the stretchable member are not fixed in the stretched state, and the stretchability is not helpful. Therefore, in Fig. 1, only the portion of the stretchable member which contributes to the stretchability is shown. In addition, it is preferable that a portion of the pair of the side cutout portions 43 to the long side of the pair of back side cutout portions 44 has a stretchable member that contributes to stretchability. However, the present invention is not limited thereto, and may be a disposable diaper 1 having only one of the leg-surrounding member 6 and the three-dimensionally-folding elastic member 22, or a disposable diaper 1 having no elastic member that expands and contracts in the longitudinal direction. .

Further, in the disposable diaper 1 of the present embodiment, each of the front side cutout portion 43 and the back side cutout portion 44 has a mountain shape. In other words, as shown in Fig. 7B, in the respective cutout portions 43, 44, the outer portion in the width direction is longer than the length in the longitudinal direction of the inner portion, and the position in the longitudinal direction of the top portions 43a, 44a becomes in the wide width. The shape of the outer end 431, 441 of the direction between the two ends in the longitudinal direction (between 43b and 43c, between 44b and 44c).

Therefore, by the contraction force of the leg-surrounding member 6 and the three-dimensional hemispherical elastic member 22, the notch portions 43 and 44 are reduced in the width direction, and the shape of each of the notch portions 43 and 44 is formed. As a result, as shown in FIG. 7A, a fold 45 is formed between the pair of the front side notch portions 43 along the width direction, and a fold along the width direction is formed between the pair of back side notch portions 44. Trace 46. In particular, each of the end portions 431 and 441 of the outer end portions 431 and 441 of each of the notch portions 43 and 44 in the longitudinal direction is provided with a notch portion 43 at a central portion (a central portion of the center portions 43b and 44c of the portions 43b and 43c). The positions of the top portions 43a and 44a of the 44 in the longitudinal direction may be sufficient. In this way, the beautifully formed creases 45 and 46 are respectively connected between the pair of the front side cutout portions 43 and the pair of the back side cutout portions 44. However, the shape of each of the notch portions 43, 44 is not limited to this.

Further, since the creases 45 and 46 are formed in the natural state of the disposable diaper 1, the disposable diaper 1 is easily folded with the folds 45 and 46 as a base point, and is easily formed into a three-dimensional shape of the wearer's body along the positioning posture. . Moreover, the assistant who installs the disposable diaper 1 in the low-weight child also recognizes the wrinkles 45 and 46 to visually recognize the shape of the disposable diaper 1 along the positioning posture. The diaper 1 can be installed in a positioning posture. However, the present invention is not limited thereto, and the creases 1 and 46 may not be formed in the disposable diaper 1 .

Further, in the present embodiment, the absorbent core of the absorbent core 41 is not present at all in the front side cutout portion 43 and the back side cutout portion 44, and the absorbent core 41 is completely cut, but the invention is not limited thereto. A portion having a lower basis weight of the absorbent material (for example, a portion having a basis weight of 50% or less in the periphery) may be used as the notch portion than the surrounding portion. At this time, since the degree of freedom of deformation and deformation is high in the peripheral portion of each of the notch portions, the disposable diaper 1 (absorbent core 41) can be worn along the wearer who takes the positioning posture.

===Modifications ===

8 and 9 are schematic plan views of the disposable diaper 1 in a modification. In the above-described embodiment, the narrowed portion (the large notch portion) of the absorbent core 41 is provided with a small belly-shaped notch portion 43 and a back side notch portion 44, which are not limited thereto. For example, as shown in FIG. 8, the absorbent body core 41 which has only the small abdominal notch part 43 of the mountain shape, and the back side notch part 44 may be sufficient. In other words, the width of the absorbent core 41 between the pair of the front side cutout portions 43 and the pair of the back side cutout portions 44 may be set to be longer than the pair of the front side cutout portions 43. The width of the absorbent core 41 on one side is equal to the width of the absorbent core 41 on the one side in the longitudinal direction of the pair of back side notches 44. In the disposable 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 is changed due to the positioning posture, since the excretion position is not changed, the ventral notch 43 and the back side notch are not allowed. The narrowing of the absorbent core between the portions 44 ensures the excrement Absorbs and suppresses leakage of excreta.

Further, the disposable diaper 1 can be fixed to the wearer even if the wearer's abdomen is caught by the end 1B of the disposable diaper 1 in the longitudinal direction, and the root of the wearer's leg can be lifted up. It is closer to the position of the end 1B on the other side in the longitudinal direction of the disposable diaper 1. Here, the center (position i) of the eighth region A8 between the center of the product of the disposable diaper 1 (position b) and the end 1B (position h) of the other side in the longitudinal direction of the disposable diaper 1 may be located. On the other side in the longitudinal direction, that is, the top portion 43a of the abdominal notch 43 may be provided in the ninth region A9 between the center (position i) of the eighth region A8 and the locking end 1c1 (position a).

Further, in the second region A2 closer to the locking end 1c1 of the buckle 10 than the center (position b) of the disposable diaper 1, as shown in Fig. 8, at the locking end 1c1 (position a) The top portion 43a of the front side cutout portion 43 is provided at a position, a position on the center of the product (position b).

In addition, the absorbent body core 41 is not limited to a small notch portion provided with a mountain shape, and as shown in FIG. 9, a pair of notch portions 47 (hatched portions in the figure) which are cut in the longitudinal direction and are gently cut may be provided. Even in this case, in the second region A2 closer to the locking end 1c1 of the buckle 10 than the product center (position b), the portion of the absorbent core 41 sandwiched by the pair of notches 47 can be provided. The narrowest part of the wide W1. In this way, the absorbent core 41 can be placed along the wearer's leg in a positional orientation.

Further, as shown in Fig. 1, in the unfolded state of the disposable diaper 1, a disposable diaper of the aspect 1 in which the slit line 50 for the portion where the buckle 10 is fixed to the first waistline portion 1a is formed. Also, it can be the following paper diaper.

The paper diaper according to the aspect 2, wherein the slit line 50 is at a position corresponding to each of the buckles 10 formed on both sides in the width direction, and the slit line 50 is Each of the portions which are the waist-opening portions is formed by a route extending to the inner side in the width direction from the portion in which the buckle 10 is fixed to the first waist portion 1a, and extending to the portion which is the leg-opening portion. .

The paper diaper according to the aspect 3, wherein the slit line 50 has a plurality of through holes penetrating the thickness direction, and the plurality of through holes are required to extend along the slit line 50. Arrange in the direction.

The paper diaper of the aspect 4, wherein the slit line 50 has a first slit line portion formed to extend from a portion that becomes a waist opening portion to a long side in the longitudinal direction; The unit is located on the inner side in the longitudinal direction of the first incision line portion, and is per unit of the direction in which the incision line 50 extends in the second incision line portion at the same position as the buckle band 10 in the longitudinal direction. When the ratio of the length of the through hole is compared, the ratio of the second slit line portion is smaller than the ratio of the first slit line portion.

The paper diaper according to the aspect 5, wherein the slit line 50 is located on the inner side in the longitudinal direction of the second slit line portion, and has a forward side in the longitudinal direction. The ratio of the ratio of the length of the through-hole per unit length in the direction in which the incision line 50 extends in the curved portion of the curved shape that is displaced outward in the width direction is the ratio of the ratio of the second incision line portion The aforementioned ratio of the aforementioned curved portion is smaller.

The paper diaper according to any one of the aspects of the first aspect, wherein the slit line 50 has a linear extension from a portion which is the waist opening portion along the longitudinal direction. The linear portion is a curved portion having a curved shape that is located on the inner side in the longitudinal direction of the linear portion and that is displaced toward the outer side in the wide direction toward the inner side in the longitudinal direction.

The diaper of the ninth aspect of the invention is the paper diaper according to the aspect of the invention, wherein each of the two sides of the wide-width direction is provided in the longitudinal direction so that the portion which is the leg-opening portion is contracted in the longitudinal direction. In the leg-surrounding member 6, the portion on the side of the waist opening portion and the portion on the side of the leg-opening portion are imaginarily divided into half in the curved portion, and the leg-surrounding member 6 is seen from the thickness direction. At this time, the leg stretchable member 6 intersects with the portion on the waist opening portion side of the curved portion.

The paper diaper of the aspect 8 is the urine of the state 6 or 7. The paper diaper has a plurality of sheets laminated in a thickness direction, and the number of laminated sheets of the sheet at least a part of the curved portion is larger than the number of laminated sheets of the sheet at the linear portion less.

The paper diaper according to any one of the aspects of the present invention, wherein the paper diaper has a resin film (back film 3) extending in the longitudinal direction at the time of manufacture, and the linear portion It is formed on the aforementioned resin film.

A paper diaper according to any one of the aspects 1 to 9, wherein each of the two sides of the wide direction is provided with a sheet-like three-dimensional fold which is respectively disposed along the long direction. In the side 20, the three-dimensional folded edge 20 has a base end portion that is not erectable in the thickness direction in the width direction, and a rising portion that can be raised toward the skin side in the thickness direction with the base end portion as a fulcrum, and the erected portion The portion is contracted in the longitudinal direction in accordance with the contraction force acting in the longitudinal direction of the rising portion, and the rising portion is raised toward the skin side in the thickness direction.

The slit line 50 is formed at a position outside the width direction in the base end portion and the rising portion.

The paper diaper according to any one of the aspects 1 to 10, wherein the absorbent core 41 is formed by laminating an absorbent material absorbing liquid in a thickness direction at the center in the wide direction. .

The slit line 50 is formed at a position outside the absorbent core 41 in the width direction.

The disposable diaper of the unfolded type diaper is a diaper of any aspect of the aspect 1 to 11, wherein the portion of the second waist portion 1c that is the waist opening portion is at a position in the width direction. A cutting line (not shown) is formed along the longitudinal direction at the same position as the slit line 50.

The above-described embodiments are intended to facilitate the understanding of the present invention and are not intended to limit the invention. It is to be understood that the invention may be modified or modified without departing from the spirit and scope of the invention.

1‧‧‧Expanded disposable diapers (paper diapers)

1a‧‧‧1st waist circumference

1b‧‧‧胯 lower part

1c‧‧‧2nd waist circumference

2‧‧‧ top sheet

3‧‧‧Back film

4‧‧‧Acceptor

6‧‧‧Right stretch members (stretchable members)

10‧‧‧ buckle

11‧‧‧Substrate

12‧‧‧ hook sheet

13‧‧‧Flanking

14‧‧‧Flanking

20‧‧‧Three-dimensional folding

21‧‧‧Three-dimensional folded sheets

22‧‧‧Flexible members for three-dimensional hemming (stretchable members)

41‧‧‧Absorbing body core

42‧‧‧Covered timber

43‧‧‧ Ventral notch (notched part)

44‧‧‧ Back side notch

50‧‧‧cut line

Claims (8)

A disposable disposable diaper having a longitudinal direction and a wide width direction which intersect each other, and the first waist portion, the crotch portion, and the second waist portion are arranged from the one side in the longitudinal direction, that is, A disposable diaper comprising: an absorbent core; and a pair of buckles extending from the first waist portion toward the outer sides in the width direction, wherein the second waist portion is aligned When the both ends of the disposable diaper in the longitudinal direction are provided, the end portion of the crotch belt in the longitudinal direction of the crotch portion has a locking end of the buckle, and the absorbent core is The both ends of the wide direction have a pair of notch portions, and the absorber core has another pair of notch portions on the one side in the longitudinal direction than the pair of notch portions, and is in the longitudinal direction. The narrowest portion of the portion of the absorbent core sandwiched by the pair of notch portions is located at the center of the product as the center of the disposable disposable diaper, and is locked with the aforementioned In the area between the ends, the The region between the center of the region and the locking end is the narrowest portion of the portion of the absorbent core sandwiched by the other pair of notches in the longitudinal direction. Abandoned as a The center of the product of the center of the disposable diaper is located further on the other side opposite to the one side. The disposable diaper according to the first aspect of the invention, wherein the second waist portion has a pair of side flaps extending outward from the crotch portion on both outer sides in the width direction, in the longitudinal direction The narrowest portion of the portion of the absorber core sandwiched by the pair of notch portions is located at the outermost end of the product width and the width direction of the side flap The center of the region between the ends on the one side in the longitudinal direction is located further in the region on the other side. The disposable disposable diaper according to the first or second aspect of the invention, wherein the portion of the absorbent core sandwiched by the pair of notch portions is wide in the longitudinal direction The narrowest portion is a region located on the other side of the center of the region between the center of the product and the end of the other side of the absorbent core. The disposable disposable diaper according to the first or second aspect of the invention, wherein the length of the disposable diaper in the longitudinal direction is the first length, and is discarded as described above. The aforementioned other of the aforementioned long direction of the diaper The length in the longitudinal direction of the end of the other side in the longitudinal direction of the narrowest portion of the portion of the absorbent core that is sandwiched by the pair of notch portions is the second length In the case of the length, the ratio of the second length to the first length is 22% or more and 26% or less. The disposable disposable diaper according to the first or second aspect of the invention, wherein the portion of the absorbent core sandwiched by the other pair of notched portions has the narrowest width The portion is a region from the center of the product to the length of 10% of the length in the longitudinal direction of the disposable disposable diaper on the other side in the longitudinal direction. The disposable disposable diaper according to the first or second aspect of the invention, wherein at least two of the notched portions of the pair of notched portions are formed at the both end portions in the wide direction. The stretchable member that expands and contracts in the longitudinal direction is provided in the longitudinal direction, and the shape of the notch portion is such that the outer portion in the wide direction is longer than the length in the longitudinal direction of the inner portion. The position in the longitudinal direction of the top portion is a shape between the both ends in the longitudinal direction among the outer ends of the wide direction. The disposable diaper according to claim 6, wherein the disposable diaper is used between the pair of notch portions and the other pair of notched portions. State formation along the foregoing Wide creases. The disposable disposable diaper according to the first or second aspect of the invention, wherein the width of the absorbent core between the pair of notched portions and the other pair of notched portions is larger than the aforementioned The notch portion of the pair is equal to the width of the absorber core on the other side in the longitudinal direction.