TWI694815B - Absorbent article - Google Patents

Abstract

The absorbent article of the present invention includes a longitudinal direction, a width direction, and a thickness direction, and the body portion in which the ventral portion, the hip portion, and the back side portion are arranged in the longitudinal direction is provided with an absorbent chip, which It is characterized in that: a waist elastic member extending along the width direction is provided at the back end of the main body in the longitudinal direction; the body is located closer to the long side than the back end at the back The inner portion in the lateral direction is where the absorbent chip is present, and the portion between the waist elastic member of the body portion and the absorbent chip is regarded as not having the waist elastic member and the absorbent The non-existent part of the chip; the body portion is provided with a sheet-shaped three-dimensional frill forming portion spaced apart from the wide direction along the long-side direction; the three-dimensional frill forming portion uses the three-dimensional frill with elasticity The members are arranged in the longitudinal direction and arranged in the width direction: a base end portion that cannot stand up, and a stand portion that can stand up toward the skin side in the thickness direction using the base end section as a fulcrum, by The rising portion is contracted in the long-side direction, and the rising portion is raised toward the skin side in the thickness direction; at the end in the long-side direction among the rising portions A fixing portion is formed in which the end portion is fixed while being superimposed on the body portion, and the inner end portion in the longitudinal direction of the fixing portion is located closer to the long side than the absorbent chip At the outer side in the lateral direction; on the back side of the body portion, a back side wing extending from the body portion toward the outside in the width direction is formed, and a pair of adhesives are provided on both sides of the back side wing in the width direction A buckle, a pair of the above-mentioned hook-and-loop fasteners, are respectively provided with an engaging portion that engages with the ventral portion when the absorbent article is worn; in a specific position in the width direction of the engaging portion When the center position in the longitudinal direction is the center position, the center positions of the pair of engaging portions are along the center line connecting the width direction, and are centered in the width direction of the absorbent article Department, will pass the above non-existent part.

Description

Absorbent article

The present invention relates to absorbent articles.

Disposable disposable diapers have been widely used in the past. In the unfolded disposable paper diaper, the rear side (back side of the wearer) is provided with a hook and loop fastener, and the front side (abdominal side of the wearer) is provided with a hook and loop fastener Labeled tape. As an example of such disposable paper diapers, it is known to provide a waist elastic member along the width direction of the product on the rear side, and to shrink the area between the waist elastic member and the absorbent body to make the paper diaper A technique for forming a pocket that opens to the inner side (for example, Patent Document 1).

[Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2001-61888

In the disposable paper diaper of Patent Document 1 (hereinafter, also simply referred to as "paper diaper"), a pocket is formed in an area near the waist circumference of the rear, and the excrement can be suppressed by leading the excretion to the pocket Leaked to the outside of the paper diaper.

However, in such a paper diaper, when the hook-and-loop fastener provided on the side flap is stretched outward in the widthwise direction of the paper diaper, uneven stretching force is exerted on the member (nonwoven fabric, etc.) in which the pocket is formed In some cases, wrinkles are likely to occur in this part. When such creases occur, there is a problem that the opening of the pocket is insufficient, causing occlusion, etc., and there is a possibility that the effect of suppressing the leakage of excrement cannot be sufficiently obtained.

The present invention was developed in view of the above-mentioned problems, and its purpose is for a paper diaper having a pocket on the back side portion, in which the stretching force is equally applied to the portion where the pocket is formed.

The main invention for achieving the above object is an absorbent article having a longitudinal direction, a widthwise direction, and a thickness direction, and the body portion in which the ventral portion, the hip portion, and the back side portion are arranged in the longitudinal direction is It is provided with an absorptive chip, and is characterized in that: a waist elastic member extending along the width direction is provided at the back-side end of the body in the longitudinal direction; The end portion is located closer to the inner side in the longitudinal direction, where the absorptive chip is present, and the portion between the waist elastic member of the body portion and the absorptive chip is considered to be absent A waist elastic member and a non-existing portion of the absorbent chip; the body portion is provided with a sheet-shaped three-dimensional frill forming portion spaced apart from the wide direction along the long side direction; the three-dimensional frill forming portion, The elastic member for three-dimensional frills is arranged in the long-side direction, and arranged in the width direction: a base end portion that cannot stand up, and a base end portion that serves as a fulcrum and can stand up toward the skin side in the thickness direction The standing portion of the standing portion is formed by shrinking the standing portion in the longitudinal direction, and standing the standing portion toward the skin side in the thickness direction; at the end of the standing portion in the longitudinal direction, There is a fixing portion that fixes the end portion in a state of being overlapped with the main body portion, and the inner end portion of the fixing portion in the longitudinal direction exists closer to the longitudinal direction than the absorbent chip On the back side of the body portion, a back side wing extending from the body portion toward the outside in the width direction is formed, and a pair of hook and loop fasteners are provided on both sides of the back side wing in the width direction. The pair of the hook-and-loop fasteners are respectively provided with an engaging portion that engages with the abdominal portion when the absorbent article is worn; the long side at a specific position in the width direction of the engaging portion When the central position in the direction is the central position, the central positions of the pair of engaging portions along the central line connecting the width direction are tied to the central portion of the absorbent article in the width direction. Through the above non-existent part.

The other features of the present invention will be made clear from the description in this patent specification and the attached drawings.

According to the present invention, a paper diaper having a pocket on the back side portion can form a pocket perfectly by applying an equal tensile force to the portion where the pocket is formed.

1: disposable diapers (absorbent articles)

1a: ventral side

1b: back side

1m: lower hip

1asf: ventral flank

1bsf: dorsal flank

1k: Body part

1kaeL: ventral end

1kbeL: Dorsal end

1kbn: non-existent part

1mf: thigh frill

11: Absorbent chip

11ew: the widthwise end of the absorbent chip 11

12: Chip film sheet

21: Surface flakes

30: Leak-proof sheet

31: Outer structure sheet (back sheet)

31ew: the outer edge of the outer structure sheet 31

41g1: The first three-dimensional frill

41g2: 2nd solid frill

41k1: 1st base end

41k2: 2nd base end

41s1: the first stand

41s1eLa, 41s1eLb: the end of the first rising portion 41s1 in the longitudinal direction

41s2: 2nd rising part

41s2eLa, 41s2eLb: the end of the second rising portion 41s2 in the longitudinal direction

41sew1: the front end of the first rising portion 41s1 in the width direction

42a1, 42b1: 1st fixing part

42b1p: innermost part

42b2: Second fixed part

42b2p: innermost part

43b: auxiliary fixing part

43bp: innermost part

47: Three-dimensional frill slice

61: Velcro

61a: with substrate

61ap: the widthwise projection of the base material 61a

61m: Male component (engagement part)

65: The tape with the label attached

71: waist elastics

72: Telescopic area

81: Leg circumference elastic member

451: First elastic member for three-dimensional hemming

452: Second elastic member for three-dimensional hemming

SP: Pocket space

F: tensile force

F2: tensile force

S: Skin side

NS: Non-skin side

Fig. 1 is a schematic plan view of an unfolded disposable diaper 1 as an absorbent article of an embodiment.

Figures 2A, 2B, and 2C are the A-A cross-section; the B-B cross-sectional view; and the C-C cross-sectional view in the first figure.

Fig. 3 is a schematic perspective view of a disposable diaper 1 in a worn state.

Fig. 4 is a schematic plan view showing an enlarged view of the back side portion 1b of the disposable diaper 1 of the embodiment.

Fig. 5 is a schematic cross-sectional view of a state where a pocket-shaped space SP is formed in the body portion 1k according to the contraction force of the three-dimensional hemming 41g1.

FIG. 6 is a diagram for explaining the positional relationship between the male member 61 m (engagement portion) of the hook-and-loop fastener 61 and the non-existent portion 1 kbn.

Fig. 7 is a schematic plan view (plan view viewed from the skin side) of the back side portion 1b of the disposable paper diaper 1 of the present embodiment in a natural state.

Fig. 8 is a schematic plan view showing an enlarged view of the back side portion 1b of the disposable diaper 1 in other embodiments.

Fig. 9 is a disposable paper diaper 1 in another embodiment A schematic plan view showing an enlarged view of the back side portion 1b.

Fig. 10 is a schematic plan view showing an enlarged view of the back side portion 1b of the disposable paper diaper 1 of another embodiment.

FIG. 11A is a diagram for explaining the slit provided in the disposable paper diaper 1.

FIG. 11B is a cross-sectional view in the longitudinal direction of the paper diaper 1 folded in a three-folded state.

[Form for carrying out the invention]

From the description of this patent specification and the attached drawings, at least the following matters are clear.

(1) An absorbent article having a longitudinal direction, a widthwise direction, and a thickness direction, wherein the body portion in which the abdominal portion, the hip portion, and the back side portion are arranged in the longitudinal direction is provided with an absorbent chip, It is characterized in that a waist elastic member extending along the width direction is provided at the back end of the body in the longitudinal direction; and the waist part is located closer to the back than the back end at the body The inner portion in the longitudinal direction is where the absorbent chip is present, and the portion between the waist elastic member and the absorbent chip of the body portion is regarded as not having the waist elastic member and the absorbent The non-existent part of the flexible chip; the body portion is provided with a sheet-shaped three-dimensional frill forming portion spaced apart from the wide direction along the long-side direction; the three-dimensional frill forming portion uses the three-dimensional frill The elastic member is arranged in the long-side direction There are a base end portion that cannot stand up, and a stand-up portion that can stand up toward the skin side in the thickness direction using the base end portion as a fulcrum, and the stand-up portion shrinks in the long-side direction so that The rising portion rises toward the skin side in the thickness direction; an end portion of the rising portion in the longitudinal direction is formed with a fixing portion that fixes the end portion in a state of being overlapped with the body portion , And the inner end portion of the fixing portion in the longitudinal direction is present at an outer side closer to the longitudinal direction than the absorbent chip; on the back side of the body portion, formed from the body portion toward A pair of hook-and-loop fastener tapes are provided on both sides of the widthwise direction of the back-side wings that extend outward from the widthwise direction. A pair of the hook-and-loop fasteners are respectively provided when the absorbent article is worn. The engaging portion engaged with the ventral portion; when the position of the center in the longitudinal direction of the specific position in the width direction of the engaging portion is taken as the central position, the pair of the engaging portions The central positions of the central positions connected to each other along the width direction are tied to the central portion of the absorbent article in the width direction, and pass through the non-existing portion.

According to such an absorbent article, a paper diaper equipped with a pocket on the back side can form a pocket perfectly by applying an equal tensile force to the portion where the pocket is formed.

(2) In this absorbent article, it is preferable that the inner end portion in the longitudinal direction of the fixing portion is located closer to the outer side in the longitudinal direction than the position where the center line passes.

According to such an absorbent article, the outward stretching force acting along the center line in the wide direction can be fixed by the high rigidity fixing part. It is easy to act on the whole of the non-existent part without being hindered. This makes it easier to suppress the occurrence of problems such as wrinkles in non-existent parts.

(3) For this absorbent article, it is preferable to engage a pair of the above-mentioned engagements when the position of the outer end in the longitudinal direction of the specific position in the width direction of the engagement portion is the outer end position A straight line connecting the outer end positions of the portion along the width direction passes through the portion where the waist elastic member is disposed in the body portion.

According to such an absorbent article, when the hook-and-loop fastener is stretched outward in the width direction, the stretching force can easily act on the waist elastic member, and the waist elastic member is stretched outward in the width direction without loosening. Thereby, the non-existing portion formed adjacent to the waist elastic member in the long-side direction is not slack, and is easily extended toward the wide direction.

(4) In this absorbent article, it is preferable to engage a pair of the above-mentioned engagements when the position of the inner end in the longitudinal direction of the specific position in the width direction of the engagement portion is taken as the inner end position A straight line connecting the inner end positions of the portion along the width direction passes through the portion where the absorbent chip is arranged in the body portion.

According to such an absorbent article, when the hook-and-loop fastener is stretched outward in the width direction, the stretching force can easily act on the absorbent chip, and the absorbent chip is stretched outward in the width direction without loosening. Thereby, the non-existing portion formed adjacent to the absorptive chip in the long-side direction is not slack, and it is easy to be elongated in the width direction.

(5) The absorbent article is preferably a pair of the above-mentioned hook-and-loop fasteners, each of which has the above-mentioned engagement at a plurality of positions in the longitudinal direction The central line is defined by: the plurality of engaging portions provided in the longitudinal direction, which is defined in the engaging portion closest to the position where the waist elastic member is disposed in the longitudinal direction Of the above central location.

According to such an absorbent article, a plurality of pairs of engaging portions can be engaged on the tape to which the label is affixed, and the fit of the waist portion can be improved when the paper diaper is worn, and it can act on each engaging The forces of the Ministry are scattered. Thereby, when the paper diaper is worn, unintentional peeling of the engaging portion can be suppressed, and the form when the paper diaper is worn can be easily maintained.

(6) In this absorbent article, it is preferable that, in the waist elastic member, a region that is expandable and contractable in the width direction is overlapped with the three-dimensional frill forming portion.

According to such an absorbent article, as the waist elastic member stretches toward the outside in the width direction by the stretching force outside in the width direction, the pair of three-dimensional frill sheets each have a force to open toward the outside in the width direction, and It is possible to suppress the three-dimensional hemming sheet from falling inward toward the width direction. Thereby, when the paper diaper is worn, the three-dimensional ruffle sheet can be easily raised, and it is easy to suppress the leakage of excrement and the like toward the outside of the paper diaper.

(7) In this absorbent article, it is preferable that the back side flap and the hook-and-loop fastener are composed of different members. The hook-and-loop fastener is joined to the outer end in the width direction of the back side flap.

According to such an absorbent article, the two sheet members and the hook-and-loop fastener constituting the back side flap are repeatedly present in the thickness direction at the joint portion, and the strength of the joint portion can be improved. By this, even when the hook and loop fastener In the case of force stretching, damage or peeling of the joint portion is also suppressed.

(8) With regard to this absorbent article, it is preferable that a plurality of fold lines for forming the base point when the absorbent article is folded toward the long side direction are provided along the width direction, and a region in which the plurality of fold lines are formed One is through the non-existent part.

According to such an absorbent article, since at least one of the plurality of fold lines is formed by passing through the region of the non-existent portion with low rigidity, it is easy to leave a crease in the non-existent portion. This makes it easy to fold the paper diaper in the longitudinal direction. Furthermore, when the paper diaper is put into a wearing state, it is easy to form a pocket-like space.

The absorbent article is characterized in that the main body is provided with a pair of first three-dimensional frills spaced apart in the widthwise direction along the long-side direction; and located closer to the first three-dimensional frills A pair of second three-dimensional frills on the outer side in the width direction are provided along the long-side direction; the first three-dimensional frills are arranged with the first elastic member in the long-side direction and have: The first base portion that cannot stand in the width direction and the first stand portion that can stand up toward the skin side in the thickness direction using the first base end as a fulcrum; the second three-dimensional frill is The second elastic member is arranged in the long-side direction, and has a second base end portion that is arranged in the width direction and cannot stand up, and a second base end portion that can face the thickness direction using the second base end portion as a fulcrum A second standing portion standing on the skin side; the back side end portion among the first standing portion is formed by fixing the first three-dimensional frill in a state where it is superposed on the body portion The first fixed portion; the back of the second raised portion The side end portion is formed with: a second fixing portion that fixes the second three-dimensional frill in a state where the second three-dimensional frill is superimposed on the body portion; the first fixing portion overlaps the expansion and contraction area of the waist elastic member; The first fixing portion is present on the outer side closer to the longitudinal direction than the absorbent chip; the second fixing portion is separated from the expansion and contraction area of the waist elastic member with the first fixing portion interposed therebetween The above wide-width direction is so ideal.

According to such a configuration, the contraction force of the elastic region of the waist elastic member 71 and the contraction force generated by the first elastic member due to the overlap of the elastic region of the waist elastic member and the first three-dimensional frill are due to the first fixing portion In conjunction, the waist elastic member and the first elastic member continuously contract. On the other hand, since the second fixing portion is separated from the expansion and contraction area of the waist elastic member across the first fixing portion, the contraction force of the waist elastic member and the contraction force of the second elastic member are not linked.

If the second fixing portion of the second three-dimensional frill overlaps the expansion and contraction area of the waist elastic member, the contraction force of the waist elastic member and the contraction force generated by the second elastic member will be linked, causing the second fixing portion to contract. In this way, not only the expansion and contraction area of the waist elastic member and the first fixing portion, but also the second fixing portion will contract in the widthwise direction, and the entire back side end portion will be stretched inward in the longitudinal direction, so When the absorbent article is worn in the sleeping position, creases are formed on the back end, and the wing is drawn inward in the widthwise direction, causing the wing to sink under the user's body, thereby reducing the wearability.

On the other hand, in the above-mentioned configuration, as described above, the waist elastic member The contraction force of is not linked to the contraction force of the second elastic member. Therefore, the second fixing portion can be provided with a region that does not easily shrink in the width direction. The material in the area that is less likely to cause shrinkage is roughly stretched and tiled, so it is not easy to form creases outside the area in the width direction. Furthermore, because only the central area on the back side will be formed by the contraction force of the first elastic member The shape sinks toward the inner side in the longitudinal direction, so using these areas on the left and right sides as a reference, it is easier to determine the center of the width direction from observation. In addition, since the wings are less likely to sink under the body and tend to stretch outward in the width direction, the creases or creases formed under the user's body can be stretched to wear the product, so the fit to the body can be improved Stickiness. In addition, by stretching the pleats or creasing, when the absorbent cotton pad used as an auxiliary absorption is used together, the cotton pad can be easily inserted.

With regard to this absorbent article, it is preferable that the second fixing portion is present closer to the outer side in the longitudinal direction than the absorbent chip.

According to such an absorbent article, since the second fixing portion is located closer to the outer side in the longitudinal direction than the absorbent chip, the second fixing portion can be formed at the end near the longitudinal direction. As described above, the second fixing portion can be provided with a region that is less likely to cause shrinkage in the widthwise direction. By arranging a region that is less likely to cause shrinkage in the widthwise direction to be closer to the end in the longitudinal direction, the width can be easily determined by observation Central direction. In addition, in addition to stretching the waist elastic member by the contraction force of the first three-dimensional frill, the expansion and contraction area of the rigid waist elastic member maintains the shape of the surface and makes its longitudinal section zigzag. There is a part that can form a pocket-like space, and because With this configuration, the pocket-shaped space can be further increased, so that leakage from the back side can be prevented.

(9) For this absorbent article, it is preferable that the shape of the edge in the longitudinal direction of the absorbent chip is such that the central portion of the widthwise direction is larger than the widthwise end The side portion has a curved shape that protrudes further outward in the longitudinal direction.

According to such an absorbent article, the shape of the edge of the absorbent chip in the longitudinal direction becomes a portion on the center side in the width direction, which is more outward than the portion on the end side in the width direction. The protruding curved shape causes the waist elastic member and the first rising portion to contract along the curved shape by interlocking the contraction force of the waist elastic member and the contraction force of the first elastic member. Therefore, with the shape contracted along the curved shape as a reference, it is easy to determine the central portion in the width direction from observation. In addition, the area formed between the first three-dimensional frill and the surface sheet near the boundary between the first fixing portion and the first rising portion of the first three-dimensional frill can be made due to the thinner thickness of the absorbent chip. Be wider. Therefore, since the pocket-shaped space formed in the corresponding area is large, leakage can be reduced, and when the absorbent cotton pad is used, the cotton pad can be easily inserted.

(10) In this absorbent article, it is preferable that at least the central region in the width direction of the absorbent chip is formed to have a lower basis weight than the other regions of the absorbent chip.

According to such an absorbent article, by forming the central region of the absorbent chip in the width direction to a low basis weight, this region can be used as an indicator when a disposable paper diaper (absorbent cotton pad) is worn, and Make The cotton pads are better placed neatly. Therefore, the position of the center of the disposable paper diaper in the width direction and the center of the user's body (or the center of the absorbent cotton pad in the width direction) are more easily aligned (relatively aligned).

(11) In this absorbent article, it is preferable that the waist elastic member includes a plurality of linear elastic members extending along the width direction, and the first fixing portion is located at the innermost side in the longitudinal direction The fixed end is located in the non-existent portion, and at least a part of the first fixed portion is provided in the plurality of linear elastic members, the innermost linear elastic member and the outermost The area sandwiched by the linear elastic member.

According to such an absorbent article, by providing at least a part of the fixing portion in the region sandwiched by the innermost linear elastic member and the outermost linear elastic member in the longitudinal direction, in a natural state, by acting A plurality of linear elastic members are pulled toward the inside by the contraction force in the longitudinal direction of the rising portion. Therefore, the end on the back side is formed into a shape close to a circular arc (R shape). In addition, since the fixed end is located in the non-existent portion, in a natural state, the non-existent portion having lower rigidity than the other regions will be pulled inward due to the contraction force acting in the longitudinal direction of the standing portion. This non-existent portion pulled inwards complements the portion on the back side and forms a shape (R-shape) closer to an arc. In this way, by forming the vicinity of the back-side end (back-side end and non-existing portion drawn inward) close to a circular arc shape, it is possible to easily align the width direction of the disposable paper diaper The center of the wearer's body (or the center of the absorbent cotton pad in the width direction) position.

For this absorbent article, it is preferable that the first fixing portion is provided so as to span the entire region sandwiched by the innermost linear elastic member and the outermost linear elastic member in the longitudinal direction .

According to such an absorbent article, the fixing portion is provided across the entire region sandwiched by the innermost linear elastic member and the outermost linear elastic member in the longitudinal direction, in a natural state Next, the contraction force acting in the longitudinal direction of the standing portion will act on the entire area. Therefore, near the end of the back side, a shape (R-shape) that is closer to a circular arc is formed. Therefore, it is easier to align the center of the disposable paper diaper in the width direction with the center of the wearer's body (or the center in the width direction of the absorbent cotton pad).

With regard to this absorbent article, it is preferable that the back end is formed with a region located outside the linear elastic member at the outermost side in the longitudinal direction and contracted as the linear elastic member contracts, That is, it is longer than the shrinkage region in the longitudinal direction than the interval between the adjacent linear elastic members.

According to such an absorbent article, when a plurality of linear elastic members are pulled inward due to the contraction force acting on the longitudinal direction of the rising portion, such a contracted area is fan-shaped with respect to the linear elastic member Spread out. Therefore, near the end of the back side, a shape (R-shape) that is closer to a circular arc is formed. Therefore, it is easier to align the center of the disposable paper diaper in the width direction with the center of the wearer's body (or the center in the width direction of the absorbent cotton pad).

For this absorbent article, it is preferable that the length in the longitudinal direction of the contracted area is longer than the length in the longitudinal direction of the area sandwiched between the outermost linear elastic member and the innermost linear elastic member Half of it is still long.

According to such an absorbent article, by forming the contraction region longer, the shape near the end on the back side becomes more pronounced close to an arc (R shape).

=== Implementation form ===

Fig. 1 is a schematic plan view of an expanded state (described below) of an adult disposable disposable diaper 1 as an absorbent article of an embodiment. Figures 2A, 2B, and 2C are the A-A cross-section; the B-B cross-sectional view; and the C-C cross-sectional view in the first figure. Moreover, in FIGS. 2A to 2C, based on the display on the paper surface, only one side in the width direction is displayed. FIG. 3 is a schematic perspective view of the disposable diaper 1 in a worn state. Fig. 4 is a schematic plan view showing the back side portion 1b of the disposable diaper 1 in an enlarged manner. Fig. 5 is a schematic cross-sectional view of a state where a pocket-shaped space SP is formed in the body portion 1k according to the contraction force of the three-dimensional hemming 41g1 (details will be described later).

The "expanded state", as shown in Fig. 1, refers to releasing the locking of each hook-and-loop fastener 61 to the hook-and-loop fastener tape 65, so that the abdominal portion 1a, the lower hip portion 1m, and the dorsal portion 1b are aligned In the state of the longitudinal direction, the contraction of the first rising portion 41s1 is formed by the first three-dimensional frill elastic member 451, and the second standing is formed by the second three-dimensional frill elastic member 452 The contraction of the start portion 41s2, the contraction of the back end 1kbeL formed by the waist elastic member 71, and the contraction of the thigh frill 1mf formed by the leg elastic member 81, are just eliminated, and the disposable diaper 1 The state of extending in both the long side direction and the wide direction.

The disposable diaper 1 is an unfolded (open type) paper diaper that uses a hook-and-loop fastener 61 for the wearer to wear. The disposable paper diaper 1 in the unfolded state as shown in FIG. 1 has three directions orthogonal to each other: a long-side direction, a wide-width direction, and a thickness direction. Here, in the longitudinal direction, the abdominal part 1a, the hip part 1m, and the dorsal part 1b are arranged in this order. In the wearing state of FIG. 3, the abdominal part 1a is covered by the wearing not shown The ventral side of the wearer; the lower hip 1m covers the wearer's crotch; the dorsal part 1b covers the wearer's back.

Also, in the expanded state of FIG. 1, the ventral portion 1a and the dorsal portion 1b extend outward in the widthwise direction from the lower portion of the buttocks 1m, whereby they are discarded after being viewed from the thickness direction The outer shape of the shaped paper diaper 1 becomes an approximate hourglass shape when viewed from above. In the following, the portions 1asf and 1asf that extend outward in the widthwise direction on the ventral portion 1a are also referred to as "ventral side flaps 1asf", and each portion that extends outward in the widthwise direction on the dorsal portion 1b The parts 1bsf, 1bsf are called "back side wings 1bsf". In the same manner, in the following, one side in the thickness direction is also referred to as the “skin side”, and the other side is referred to as the “non-skin side”. The schematic plan view of FIG. 1 is a disposable diaper 1 after use in which the unfolded state is viewed from the skin side.

Here, as shown in Fig. 1, in each back side wing 1bsf The outer ends of the width direction are respectively provided with hook-and-loop tapes 61 protruding toward the width direction. Moreover, each of the hook-and-loop fasteners 61 and 61 is locked to the hook-and-loop fastener tape 65 provided on the non-skin side surface (hereinafter referred to as "non-skin side") of the abdominal portion 1a (please refer to Figure 1, FIG. 2C), as shown in FIG. 3, a waist opening HB and a pair of leg openings HL, HL are formed, and the disposable diaper 1 is used for the wearer to wear.

The disposable paper diaper 1 has a sheet-like body portion 1k as shown in Figs. 1, 2B, and 2C. The main body portion 1k includes an absorbent chip 11 that absorbs excretory fluid such as urine, a surface sheet 21 covering the absorbent chip 11 from the skin side in the thickness direction, and a leak-proof covering the absorbent chip 11 from the non-skin side The sheet 30 and the exterior sheet 31 that covers the absorbent chip 11 from the non-skin side than the leak-proof sheet 30 to become a disposable diaper 1 outer garment member.

Furthermore, the main body portion 1k is further provided with a three-dimensional frill sheet 47, a hook-and-loop strap 61, a hook-and-loop fastener tape 65, a waist elastic member 71, and a leg elastic member for forming a second three-dimensional frill 41g2 described later. 81, etc., and disposable diapers 1 after use.

In addition, the longitudinal direction, the width direction, and the thickness direction of the main body portion 1k are oriented in the same direction as the longitudinal direction, the width direction, and the thickness direction of the disposable diaper 1, respectively. Therefore, in the following description, these directions are used without distinction between the disposable diaper 1 and the main body 1k after use.

In the following, one side refers to the drawing, and the other side refers to the disposable type The details of each constitution of the paper diaper 1 will be explained.

The absorptive chip 11 is a portion of the main body portion 1k, which is more inside than the end portion 1kbeL on the back side (FIG. 1 ). The absorbent chip 11 is formed by forming liquid absorbent fibers such as pulp fibers or liquid absorbent fibers such as superabsorbent polymers (SAP) into a roughly hourglass shape in plan view. An example of a specific shape. In addition, the absorbent chip 11 is covered with a liquid-permeable chip adhesive film sheet 12 from both the skin side and the non-skin side in the thickness direction (refer to FIG. 2B). Suitable materials for the chip film 12 can be exemplified by fiber paper or non-woven fabric. However, here, these chip glue film sheets 12 are not essential.

The surface sheet 21 is a flexible and liquid-permeable rectangular sheet covering the absorbent chip 11 from the skin side. In this embodiment, since the surface of the absorbent chip 11 on the skin side is covered by the die-bonding film sheet 12, the surface sheet 21 covers the die-bonding film sheet 12 from the skin side surface with a hot-melt adhesive, etc.固定于片胶膜片12。 Fixed to the chip adhesive film 12. In addition, the surface sheet 21 that needs to cover approximately the entire area of the skin-side surface of the absorbent chip 11 is approximately the same size as the absorbent chip 11 in the width direction, and has a secondary chip in the longitudinal direction 11 The size exposed on both sides. In this embodiment, the surface sheet 21 is provided along the entire length of the disposable diaper 1 in the longitudinal direction (please refer to FIG. 1). Suitable materials for the surface sheet 21 can be exemplified by suitable nonwoven fabrics such as air-through nonwoven fabrics, but they are not limited thereto as long as they have liquid permeability and flexibility. Also, this embodiment The surface sheet 21 in the figure is configured as a first three-dimensional frill 41g1 (details will be described later).

The leak-proof sheet 30 is a flexible and liquid-impermeable rectangular sheet covering the absorbent chip 11 from the non-skin side (please refer to FIGS. 1 and 2B). Furthermore, as described above, the non-skin side of the absorbent chip 11 is covered with the die glue film sheet 12, and the leak-proof sheet 30 covers the die glue film sheet 12 from the non-skin side, while using a hot-melt adhesive, etc.固定于片胶膜片12。 Fixed to the chip adhesive film 12. In addition, the leak-proof sheet 30 that needs to cover the entire area of the non-skin side of the absorbent chip 11 has a planar size that is exposed from the absorbent chip 11 toward both sides in the width direction and both sides in the longitudinal direction. In this example, the leak-proof sheet 30 is provided along the entire length of the disposable diaper 1 in the longitudinal direction (please refer to FIG. 1). In addition, in the leak-proof sheet 30, the portion exposed from the absorbent chip 11 and the die glue film sheet 12 in the longitudinal direction or the width direction is fixed to the surface sheet 21 or the three-dimensional pleats with a hot-melt adhesive or the like边片47. A material suitable for the leak-proof sheet 30 may be a resin film such as a polyethylene film, but it is not limited to this as long as it has liquid impermeability and flexibility.

The outer packaging sheet 31 (corresponding to the back sheet) is, as already described, a sheet that becomes the outer casing member of the disposable paper diaper 1. The outer structure sheet 31 is a surface covering the non-skin side of the leak-proof sheet 30, and is fixed on the same surface with a hot-melt adhesive or the like (please refer to FIG. 2B). The exterior sheet 31 in this embodiment also has the outer shape of the disposable diaper 1 after use. Therefore, the planar shape of the outer frame sheet 31 The shape is roughly an hourglass shape (please refer to Figure 1). In addition, the exterior frame sheet 31 protrudes from the leakage prevention sheet 30 toward both sides in the width direction. The protruding portion is fixed to the three-dimensional hemming sheet 47 by hot-melt adhesive or the like (please refer to FIGS. 2A to 2C). As a material suitable for the exterior sheet 31, an appropriate non-woven fabric such as SMS (spunbond-meltblown-spunbond) spunbond (non-woven fabric) can be exemplified, but as long as it has flexibility, this Not limited to this. In addition, in the case where the outer packaging sheet 31 is formed of a liquid-impermeable sheet, the leakage prevention sheet 30 may be omitted.

For the end portion 11ew of the absorbent chip 11 in the width direction, two three-dimensional frills are provided (Figure 1, Figure 2 B). Among the two three-dimensional frills, the three-dimensional frill located inside the widthwise direction is referred to as "first three-dimensional frill 41g1", and the three-dimensional frill located closer to the outer side in the widthwise direction than the first three-dimensional frill 41g1 is. The frill is called "second solid frill 41g2".

As shown in FIG. 2B, the first three-dimensional frill 41g1 is formed by folding the end 21ew in the width direction of the surface sheet 21 toward the inside in the width direction. That is, the end portion 21ew (the folded portion) becomes the first rising portion 41s1. The first rising portion 41s1 can be raised toward the skin side in the thickness direction with the folded line L as a fulcrum. In addition, the folded line L portion becomes the first base end portion 41k1 that cannot be raised. The first base end portions 41k1 and 41s1 are arranged in the width direction. In addition, the front end portion 41sew1 (end portion 21ew) in the widthwise direction among the first rising portions 41s1 serves as the first three-dimensional frill along the longitudinal direction With the elastic member 451, for example, a linear rubber 451 of 940 DTEX is fixed in the longitudinal direction by a hot-melt adhesive or the like in a stretched state of twice the natural length. With this linear rubber, a contraction force is applied to the first rising portion 41s1 in the longitudinal direction. According to the contraction force acting, the first rising portion 41s1 shrinks in the longitudinal direction, whereby the first rising portion 41s1 forms a plurality of creases while standing toward the skin side in the thickness direction as the first three-dimensional pleats The side 41g1 functions (Figure 2B). In the present embodiment, the end of the surface sheet 21 in the width direction corresponds to the "three-dimensional frill forming portion". The main body portion 1k is provided with two three-dimensional frill forming portions spaced apart from the width direction along the longitudinal direction. In addition, the first base end portion 41k1 corresponds to the "base end portion". The first rising portion 41s1 corresponds to the "rising portion". The first elastic member 451 for three-dimensional hemming corresponds to the "elastic member for three-dimensional hemming".

The magnitude of the contraction force of the first three-dimensional hemming elastic member 451 is set as follows, for example. First, the full-length dimension in the long-side direction of the first rising portion 41s1 before the first three-dimensional hemming elastic member 451 (in the state where there is no wrinkle) is defined as a reference length of 100%. Then, when the first three-dimensional hemming elastic member 451 is provided and the pleated first rising portion 41s1 that has shrunk in the longitudinal direction is extended to 93% in the longitudinal direction, the first three-dimensional hemming is used The manner in which the elastic member 451 can generate a contraction force of 0.5N to 2N determines the extended state of the first three-dimensional hemming elastic member 451 when the first rising portion 41s1 is fixed. For example, in this example, one linear rubber 451 of 940 DTEX is used. Therefore, by extending the one linear rubber 451 in the longitudinal direction It is set to twice the natural length and fixed to the first rising portion 41s1, thereby limiting the contraction force of the linear rubber 451 at 93% elongation to 0.5N to 2N.

In addition, as shown in FIG. 1, FIG. 2 A, and FIG. 2 C, each end 41s1eLa, 41s1eLb in the longitudinal direction of the first rising portion 41s1 is used to connect each end 41s1eLa, 41s1eLb, The first fixing portions 42a1 and 42b1 to be fixed in a state of being superimposed on a portion of the surface sheet 21 that is a part of the main body portion 1k are respectively formed in a strip shape along the longitudinal direction. That is, between the end portions 41s1eLa, 41s1eLb, the portion corresponding to the first fixing portions 42a1, 42b1 and the portion of the surface sheet 21 that is located closer to the inner side in the width direction than the above-mentioned fold line L, will be The hot-melt adhesive is provided in a strip shape along the longitudinal direction as the first fixing portions 42a1 and 42b1. The respective end portions 41s1eLa and 41s1eLb are fixed by the adhesive in a state where they are overlapped with the surface sheet 21 as a part of the main body portion 1k, respectively.

Further, as shown in FIG. 4 and the like, the innermost portion 42b1p is the inner end in the longitudinal direction of the first fixing portion 42b1 of the back side portion 1b, and is present in the main body portion 1k in the specific absorption chip 11 is located further outside in the direction of the long side. More preferably, it is located at: 1 kbn where the waist elastic member 71 and the absorptive chip 11 are absent (shown as dotted patterns in FIG. 4). The non-existent portion 1 kbn is a region between the back end 1 kbeL (waist elastic member 71 located at the innermost position in the longitudinal direction) and the absorbent chip 11, and the rigidity is lower than other regions. The first fixing portion 42b1 is an example of a "fixing portion". Innermost part The point 42b1p is an example of "fixed end". In addition, the end 1kbeL on the back side is a portion located in the main body 1k, with the arrangement position of the waist elastic member 71 located at the innermost position in the longitudinal direction as a starting point, and from the starting end to the outer position in the longitudinal direction .

The length of the back side end 1kbeL in the longitudinal direction can be selected from the range of 20mm to 40mm in the unfolded state of the disposable diaper 1 as shown in Figure 4, for example, on the back side The widthwise dimension of the waist elastic member 71 provided at the end 1 kbeL can be selected from the range of 180 mm to 220 mm in the same expanded state.

In the innermost portion 42b1p of the first fixing portion 42b1, the contraction force of the first three-dimensional frill elastic member 451 acting on the first rising portion 41s1 is generated in the form of a tensile force F toward the inner side in the longitudinal direction effect. Thereby, the body portion 1k is stretched inward in the longitudinal direction via the innermost portion 42b1p.

Here, in this embodiment, the innermost portion 42b1p is located in the body portion 1k closer to the outer side in the longitudinal direction than the absorptive chip 11, and more preferably located at the non-existent portion 1kbn (refer to (4) The part shown in dotted pattern in the figure). This non-existent portion 1 kbn is a portion where the waist elastic member 71 and the absorbent chip 11 are not present as described above, and its rigidity is lower than other areas.

Therefore, as shown in FIG. 5, according to the action of the above-mentioned tensile force F, the body portion 1k is quickly bent into a substantially zigzag shape in cross-sectional view in the non-existent portion 1 kbn. As a result, in the back Side end At a position between 1 kbeL and the absorbent chip 11, a pocket-shaped space SP can be formed.

In this case, the tensile force F toward the inside in the longitudinal direction described above acts on the non-existent portion 1 kbn via the innermost portion 42b1p of the first fixing portion 42b1. Therefore, the same tensile force F does not substantially act on the back end 1 kbeL that is adjacent to the outer side in the longitudinal direction than the non-existent portion 1 kbn. As a result, the standing end 1 kbeL can be suppressed from standing Up. On the other hand, a pocket-shaped space SP (as shown in FIG. 5) can be reliably formed at a position between the back end 1kbeL and the absorbent chip 11.

Further, as illustrated in FIG. 4, the innermost portion 42b1p of the first fixing portion 42b1 is located at a position closer to the inner side than the center position C1kbnL in the longitudinal direction of the non-existent portion 1kbn. The tensile force F toward the inner side in the longitudinal direction acts at a position 1 kbeL further away from the end on the back side. As a result, it is possible to more effectively suppress the standing of the back-side end 1kbeL, make it difficult to bend the back-side end 1kbeL toward the inside during wearing, and can be attached to the wearer's back because the surface shape can be maintained.

In the example of FIG. 4, the first fixing portion 42b1 is formed at a position closer to the inner side in the width direction than the central position C41sw in the width direction in the first rising portion 41s1. In this way, in the region 41seLb where the first rising portion 41s1 overlaps the back-side end 1kbeL, the first rising portion 41s1 can be reliably fixed. However, it is not limited to these, and depending on circumstances, the first fixing portion 42b1 may be It is formed outside the center position C41sw in the widthwise direction.

In addition, as shown in FIG. 4, two auxiliary fixing portions 43 b are arranged in the width direction at a position between the first fixing portion 42 b 1 and the first base end portion 41 k 1 in the width direction. The auxiliary fixing portion 43b is an auxiliary first fixing portion 42b1. The auxiliary fixing portion 43b acts to eliminate the gap between the first rising portion 41s1 and the surface sheet 21 that can be eliminated between the first fixing portion 42b1 and the first base end portion 41k1, so it can be effectively prevented Urine leaks from the area 41seLb.

The auxiliary fixing portion 43b is also formed of hot-melt adhesive. That is, as shown in FIG. 2A, the hot-melt adhesive as the auxiliary fixing portion 43b is intermittently inserted between the first rising portion 41s1 and the surface sheet 21 in a strip shape along the longitudinal direction, thereby In addition, the first rising portion 41s1 and the surface sheet 21 may be fixed at a position between the first fixing portion 42b1 and the first base end portion 41k1 in the width direction.

In this example, the width of the auxiliary fixing portion 43b in the width direction is set to be smaller than the size of the fixing portion 42b in the width direction, and the position of the auxiliary fixing portion 43b is the long side direction. The position in the longitudinal direction of the innermost portion 43 bp of the innermost portion is aligned at the same position as the innermost portion 42b1p of the first fixing portion 42b1. However, it is not limited to this. That is, the size of the auxiliary fixing portion 43b in the width direction may be larger than the size of the first fixing portion 42b1 in the direction, or may be smaller. Also, the position of the innermost portion 43 bp of the innermost portion of the auxiliary fixing portion 43b in the longitudinal direction can be positioned in the innermost position than the first fixing portion 42b1 The side portion 42b1p is located further outside in the longitudinal direction, and conversely may be located in the inside. However, in any case, it is preferable to set the innermost portion 43 bp of the auxiliary fixing portion 43 b at the position of 1 kbn of the non-existing portion as shown in FIG. 4. On the other hand, the tensile force F toward the inner side in the longitudinal direction tends to act on the non-existent portion 1 kbn, and the rise of the waist elastic member arrangement target portion 1 kbeL can be easily suppressed. However, these auxiliary fixing portions 43b are not necessarily constituted.

On the other hand, as shown in FIGS. 1 and 2B, the second three-dimensional frill 41g2 is formed by a three-dimensional frill sheet 47 (corresponding to a second three-dimensional frill forming portion) that is a member different from the surface sheet 21 . The three-dimensional frill sheet 47 is arranged so as to span the width direction: formed on the first base end 41k1 of the first three-dimensional frill 41g1, and is provided while covering the first base end 41k1 from the skin side in the thickness direction . In addition, the three-dimensional hemming sheet 47 is fixed to the surface sheet 21 with a hot-melt adhesive or the like at the first base end portion 41k1 or the vicinity thereof, thereby fixing the three-dimensional hemming sheet 47 to the surface sheet 21 The portion becomes the second base end portion 41k2 that cannot be raised. Also, in the three-dimensional hemming sheet 47, a portion closer to the inner side in the width direction than the second base end portion 41k2 (folded outward) Part) is the second rising portion 41s2 that can be raised with the second base end portion 41k2 as a fulcrum. In addition, the front end portion of the second rising portion 41s2 in the width direction serves as the second elastic member 452 for three-dimensional hemming along the longitudinal direction, for example, a linear rubber 452 of 940DTEX is used The long side direction is stretched 2.5 times the natural length by It is fixed by hot melt adhesive. Therefore, the second rising portion 41s2 is given a contraction force in the longitudinal direction, and according to the contraction force, the second rising portion 41s2 contracts toward the longitudinal direction, whereby the second rising portion 41s2 forms a plurality of creases on one side , One side stands up to the skin side in the thickness direction, and functions as a second three-dimensional frill 41g2 (FIG. 2B ). As a material suitable for the three-dimensional hemming sheet 47, an appropriate nonwoven fabric can be exemplified. Although an SMS nonwoven fabric is used here, it is not limited to this as long as it has flexibility.

Moreover, as shown in FIG. 1, FIG. 2A, and even FIG. 2C, the three-dimensional hemming sheet 47 extends outward in the widthwise direction to approximately the outer end edges 31ew and 31ew of the outer structural sheet 31 At the same position, the outer structural sheet 31 is integrated with the outer structural sheet 31 by hot-melt adhesive or the like at or near the outer edge 31ew. Thereby, the three-dimensional hemming sheet 47 and the outer framing sheet 31 are mutually formed, and the aforementioned abdominal side flaps 1asf, 1asf and the rear side flaps 1bsf, 1bsf are formed in the ventral side portion 1a and the back side portion 1b, respectively. On the other hand, in the same way for the lower buttocks 1m, the three-dimensional hemming sheet 47 and the outer structural sheet 31 are integrated with a hot-melt adhesive or the like at the outer end edge 31ew or its vicinity The thigh wing portions 1mf and 1mf are formed from the outer end edge 31ew in a specific range covering the inside in the width direction.

Each thigh wing portion 1mf and 1mf is a portion that becomes a leg circumference opening HL in a wearing state, that is, a portion that covers the wearer's leg circumference. In addition, each thigh wing portion 1mf is contracted in the long side direction to form a thigh frill, and each thigh wing portion 1mf serves as a leg circumference elastic member 81, 81 respectively, which is a plurality of linear rubbers along the long side direction 81, 81 It is fixed by a hot-melt adhesive or the like while being elongated toward the long side. Therefore, when the stretched state of the leg elastic members 81, 81 is relaxed, the thigh wing portion 1mf contracts toward the long side to form a plurality of creases, and the creases become thigh hem.

Also, as shown in FIG. 2, the second raised portion 41s2 is different from the first raised portion 41s1, and the second base end portion 41k2 or the vicinity thereof is used as the folded position toward the outside in the width direction By folding, by this, it can be implemented in the "outward opening" state which opens toward the outside in the width direction. In addition, as shown in FIG. 1, FIG. 2 A, and FIG. 2 C, the outwardly opened state must be fixed, so at the end portions 41s2eLa, 41s2eLb in the longitudinal direction of the second rising portion 41s2, The second fixing portions 42a2 and 42b2, which are fixed in a state where the respective end portions 41s2eLa and 41s2eLb are overlapped with the main body portion 1k, are formed in a strip shape along the longitudinal direction. In addition, the second fixing portions 42a2 and 42b2 are also formed of hot-melt adhesive.

In detail, as shown in FIGS. 2A and 2C, the second rising portion 41s2 folded outward in the widthwise direction is more in the three-dimensional hemming sheet 47 than the second base end portion 41k2 The outer portion 47p facing the width direction is integrally fixed to the body portion 1k of the disposable paper diaper 1 by a hot-melt adhesive or the like, and thus becomes part of the body portion 1k . In addition, the second rising portion 41s2 is superimposed on the portion 47p that has become the three-dimensional hemming sheet 47 as a portion of the body portion 1k in a state of being folded outward in the width direction. In addition, the second raised portion 41s2 in the overlapping state and the portion 47p of the three-dimensional frill sheet 47 that has become a part of the body portion 1k as described above In between, there is a hot-melt adhesive as the second fixing portions 42a2, 42b2, whereby the second rising portion 41s2 and the portion 47p at the longitudinal ends 41s2eLa, 41s2eLb are caused by the same adhesive fixed.

Preferably, as shown in FIG. 4, the second fixing portion 42b2 located at the position of the back side portion 1b is also the innermost portion in the longitudinal direction, that is, the innermost portion 42b2p, in order to The non-existent part is 1 kbn (please refer to the part shown as a dotted pattern in Figure 4).

With this arrangement, the contraction force of the second three-dimensional hemming elastic member 452 at the second rising portion 41s2 is in the form of a tensile force F2 toward the inner side in the longitudinal direction as shown in FIG. 4 Since the innermost portion 42 bp2 acts on the non-existent portion 1 kbn, there is almost no effect on the back end 1 kbeL. Therefore, it is possible to suppress the rise of the back-side end 1 kbeL while effectively contributing to: the pocket-shaped space SP (FIG. 5) at the position between the back-side end 1 kbeL and the absorbent chip 11 form.

In addition, the magnitude of the contraction force of the second three-dimensional hemming elastic member 452 is set in the same manner as the first three-dimensional hemming elastic member 451, for example. That is, the full length dimension of the second upright portion 41s2 in the longitudinal direction before the second elastic member 452 for three-dimensional hemming is set, that is, the full length dimension in the longitudinal direction without the pleats described above is defined 100% of the reference length. In addition, when the second three-dimensional frill elastic member 452 is provided and the pleated second rising portion 41s2 that has contracted in the longitudinal direction is extended to 93% in the longitudinal direction, the second three-dimensional The stretched state of the second three-dimensional hemming elastic member 452 when the second rising portion 41s2 is fixed by the elastic member 452 for hemming generating a contraction force of 0.5N to 2N. For example, in this example, one linear rubber 452 of 940 DTEX is used. Therefore, by setting the stretched state of the one linear rubber 452 in the longitudinal direction to twice the natural length and fixed to the second rising portion 41s2, the linear rubber 452 is contracted at 93% elongation The force is limited to 0.5N~2N.

In addition, the innermost portion 42b1p of the first fixing portion 42b1 and the innermost portion 42b2p of the second fixing portion 42b2 each contribute to the formation of the pocket-shaped space SP. In the example of FIG. 4, the second fixing portion 42b2 The innermost portion 42b2p is located at the inner side of the first fixing portion 42b1 closer to the inner side in the longitudinal direction and the outer side in the widthwise direction.

Therefore, the innermost portions 42b2p and 42b1p of the two can be placed on the substantially arc-shaped curve bulging outward in the longitudinal direction. In this way, the innermost portion 42b2p of the second fixing portion 42b2 and the innermost portion 42b1p of the first fixing portion 42b1 are bent into sections by bending the body portion 1k of the disposable paper diaper 1 at various positions Viewing a substantially zigzag shape, the shape of the pocket-shaped space SP can be regarded as a substantially circular arc when viewed from a plane. In addition, as a result, it has a good fit to the generally arc-shaped buttocks, and can more effectively prevent urine and urine from leaking.

In addition, from the viewpoint of making this substantially circular arc shape, it is preferable that the second rising portion is given from the second three-dimensional hemming elastic member 452 The magnitude of the contraction force of 41s2 is preferably larger than the magnitude of the contraction force imparted to the first rising portion 41s1 from the first three-dimensional hemming elastic member 451. That is, the magnitude of the contraction force generated by the second upright portion 41s2 at the second three-dimensional hemming elastic member 452 when extended by 93% is larger than that of the first upright portion 41s1 at the first three-dimensional pleated when stretched by 93% The magnitude of the contraction force generated by the side elastic member 451 is preferably large.

In this way, as shown in FIG. 4, the innermost portion 42b2p of the second fixing portion 42b2 acts to compare the innermost portion 42b1p of the first fixing portion 42b1 toward the inner side in the longitudinal direction The tensile force F2 is greater than the tensile force F, whereby the innermost portion 42b2p of the second fixing portion 42b2 is stretched and moved toward the inner side in the longitudinal direction greatly than the innermost portion 42b1p of the first fixing portion 42b1. . The innermost portion 42b2p of the second fixing portion 42b2 is located outside the innermost portion 42b1p of the first fixing portion 42b1 in the widthwise direction and inward in the longitudinal direction. Therefore, according to the above-mentioned relationship between the magnitudes of the stretching forces F and F2 (F<F2), it can be promoted to be located in the central portion of the pocket-shaped space SP in the width direction, and become a substantially circular arc protruding further outward in the longitudinal direction As a result, the size relationship can effectively contribute to the shape of the pocket-shaped space SP along the buttocks.

The hook-and-loop fastener 61, as shown in FIGS. 1 and 2A, is provided at the outer ends in the width direction of the pair of back side wings 1bsf, respectively. The hook-and-loop fastener 61 is made of a flexible substantially rectangular sheet as the tape base 61a, and one end of the tape base 61a in the width direction is joined to the outer end of the back side flap 1bsf, and the other end is smaller than the back side flap 1bsf's outer end is more wide The outside of the direction protrudes. In addition, in the other end portion, the portion in the longitudinal direction 2 has a protruding portion 61ap that protrudes more outward in the widthwise direction. A male member 61m with a hook-and-loop fastener is fixed to each of the two protruding portions 61ap on the skin side surface.

The male member 61m is an engaging portion for engaging the hook-and-loop fastener 61 with the hook-and-loop fastener tape 65 when the paper diaper 1 shown in FIG. 3 is worn. Specifically, a plurality of engagement protrusions (not shown) are provided on the skin-side surface of the male member 61m (engagement portion), and the engagement protrusion is hooked to the hooked target of the ventral portion 1a The surface of the tape 65 on the non-skin side allows the hook-and-loop fastener 61 to be engaged by the hook-and-loop fastener tape 65. For the male member 61m, a well-known thing can be used as a surface fastener, for example, a hook-shaped one, a T-shaped one, or the like can be used as the protrusion for locking. In addition, as a material suitable for the tape base 61a, a soft sheet such as a nonwoven fabric may be exemplified. In this example, although a nonwoven fabric is used, it is not limited thereto.

As shown in Fig. 1 and Fig. 2C, the tape 65 to be affixed is provided on the non-skin side of the ventral portion 1a, that is, on the non-skin side of the outer structural sheet 31. In this example, the belt 65 has a substantially rectangular shape that is longer in the width direction, and is aligned with the outer frame sheet 31 on the one side in the center of the width direction of each other, while being adhered by heat fusion An agent or the like fixes the belt 65 to the outer structural sheet 31. As a material suitable for the tape 65 to be affixed to, the film, the airflow nonwoven fabric, etc. on which the female member is disposed can be exemplified, but it is not limited thereto. In addition, instead of using a tape to be affixed with a label, it is possible to use an outer structural sheet itself to make it easier for a protrusion for locking such as a non-woven fabric to be hooked.

The waist elastic member 71, as shown in FIG. 4, should be able to expand and contract the waist opening HB in the back side portion 1b in the wide direction, and the disposable paper diaper 1 is located in the body portion 1k. A 1kbeL end on the back side in the longitudinal direction is a member that can give a contraction force in the width direction. In this example, at the end 1 kbeL, as the waist elastic member 71, a plurality of linear rubbers 71 along the width direction are arranged in the longitudinal direction. In detail, as an example of the plural, five 940 DTEX linear rubbers 71 are arranged to extend in the width direction, and each linear rubber 71 is, for example, 2 in the width direction, which is a natural length. In the double-stretched state, one side is interposed between: the surface sheet 21 formed as the body portion 1k and the leak-proof sheet 30, while being fixed to at least one sheet (surface sheet 21) by a hot-melt adhesive or the like Or a leak-proof sheet 30). Thereby, when the stretched state is relaxed and is in a natural state, the end portion 1kbeL on the back side of the main body portion 1k contracts toward the widthwise direction, and a plurality of pleats are formed. Furthermore, by this, each linear rubber 71 can be quickly extended in the width direction until the pleats are fully extended, and as a result, the waist opening HB can be expanded and contracted in the width direction.

The contraction force of the waist elastic member 71 is set as follows, for example. First, at the time before the waist elastic member 71 is provided, the full-length dimension in the width direction of the back end 1 kbeL, that is, the full-length dimension in the width direction without the above-mentioned creases, is defined as a 100% standard length. Then, when the waist elastic member 71 is provided and the end 1 kbeL that has contracted on the back side in the width direction is extended to 93% in the width direction, The stretched state of the waist elastic member 71 when the back end 1 kbeL is fixed is determined so that the waist elastic member 71 can generate a contraction force of 2N to 8N in total. For example, in this example, as the waist elastic member 71, five 940 DTEX linear rubbers 71 are used. Therefore, by setting the stretched state of the five linear rubbers 71 in the width direction to twice the natural length and fixed to the back end 1 kbeL, the five linear rubbers at 93% elongation The total value of the contraction force of 71 is limited to 2N~8N.

Also, as shown in FIG. 4, the shape of the edge 11eb on the back side in the longitudinal direction of the absorptive chip 11 is such that the center side portion 11ebc in the width direction is wider than the end side in the width direction The portion 11ebe has a curved shape that protrudes further toward the outer side (back side) in the longitudinal direction (that is, the edge 11eb has a circular arc shape).

In this way, the shape of the pocket-shaped space SP when viewed from the skin side in the thickness direction can be curved. That is, since the rigidity of the absorptive chip 11 is generally high, when the non-existent portion 1 kbn is stretched by the stretching force F toward the inner side in the longitudinal direction, the back side end is near 1 kbeL (the back side end The portion 1kbeL and the non-existent portion 1kbn) can easily bend along the edge 11eb at a position adjacent to the edge 11eb of the absorbent chip 11. In addition, since the shape of the end edge portion 11eb is a curved shape, the vicinity of the back-side end portion 1kbeL is bent along the curved shape, and the pocket-shaped space SP can be formed into a curved shape. On the other hand, the curved shape also has a shape along the buttocks that is generally arc-shaped. So you can make the pocket The SP-shaped space is attached along the buttocks, and through good fitting to the buttocks, urine can be prevented from leaking more effectively.

That is, when the shape of the edge 11eb on the back side of the longitudinal direction of the absorptive chip 11 is curved, the length of the non-existent portion 1kbn adjacent to the edge 11eb in the longitudinal direction becomes It varies depending on the position in the wide direction. However, including such cases, the size of the non-existent portion 1 kbn in the long side direction is preferably set in the following range. That is, the position P1kbn1 with the smallest size in the longitudinal direction (in FIG. 4, the central position P1kbn1 in the widthwise direction) is set to any value in the range of 10 mm to 40 mm, for example, and the largest size in the longitudinal direction The position P1kbn2 (the position P1kbn2 in the widthwise edge of the absorptive chip 11 in FIG. 4) is preferably any value within a range of 20 mm to 50 mm. If it is set within such a range, the size of the pocket-shaped space SP can be made to be suitable for blocking the flow of urine to the back side. For example, in the case where it is larger than the above range, the pocket-shaped space SP easily collapses and it is difficult to function as a stopper. On the other hand, in the case where it is smaller than the above range, the thickness of the pocket-shaped space SP The height of the direction is low, and in this case, it becomes difficult to function as a stop weir.

<About non-existent part 1kbn>

When the wearer wears the paper diaper 1, the hook-and-loop fasteners 61 provided on both sides in the width direction are stretched toward the left and right, and the back side portion 1b is arranged on the back waist of the wearer. In this embodiment, when the region of the back side portion 1b is stretched outward in the widthwise direction in this way, local wrinkles are prevented It is generated in the non-existent part 1kbn in the lower rigid part. That is, by fully applying the force acting on the outside in the width direction to the non-existent portion 1 kbn, the non-existent portion 1 kbn is evenly extended, and the pocket-shaped space SP can be beautifully formed when the paper diaper 1 is worn.

FIG. 6 is a diagram illustrating the positional relationship between the male member 61m (engagement portion) of the hook-and-loop fastener 61 and the non-existent portion 1 kbn.

In FIG. 6, in the state where the hook-and-loop fastener 61 is stretched to the left and right, the central position in the longitudinal direction of the specific position wp in the width direction of the male member 61m (engagement portion) is taken as the central position hcp. In the present embodiment, the hook-and-loop fastener 61 and the non-existent portion 1 kbn are in a positional relationship such that one pair of male members 61m and 61m at the central positions hcp provided on both sides of the width direction along the width direction are connected to each other The central line CL can be passed through: the non-existent portion 1kbn located in the central portion of the paper diaper 1 in the width direction.

When the hook and loop fastener 61 is stretched to the left and right, the portion of the protrusion 61ap is further moved to the left and right by pinching the vicinity of the central portion of the male member 61m provided at the protrusion 61ap (that is, near the central position hcp) Stretching can efficiently force the force (stretching force) outward in the width direction. That is, since the tensile force acts along: the center line CL connecting the central position hcp of the engaging portions provided on both sides in the width direction, the center line CL is passed through the non-existent portion 1 kbn By configuring, the force outside in the width direction can directly act on the non-existent portion 1 kbn. In particular, as long as the center line CL is passed through the middle of the wide direction If the non-existent part of the central part is 1 kbn, it is easy to make the force equally act on the entire non-existent part 1 kbn. With this, the non-existent portion 1 kbn is extended equally, and the occurrence of local wrinkles can be suppressed.

In addition, the paper diaper 1 of the present embodiment has protruding portions 61ap at two locations in the longitudinal direction of the hook-and-loop fastener 61, and male members 61m (engagement portions) are provided at the respective protruding portions 61ap. Therefore, the two pairs of engaging portions can be engaged with the tape 65 to be fastened, and the fit of the waist portion of the diaper 1 when worn can be improved, and the force acting on each engaging portion can be dispersed. As a result, it is possible to suppress the accidental peeling of the engaging portion when the paper diaper 1 is worn, and it is also possible to easily maintain the paper diaper 1 in the wearing form shown in FIG. 3.

In such a case, among the two protrusions 61ap in the longitudinal direction, the protrusion 61ap close to the position where the waist elastic member 71 is disposed is the object of stretching. Therefore, the center line CL is set in the male member 61m (engagement portion) of the protruding portion 61ap provided on the outer side in the longitudinal direction. In addition, the center line CL can pass through the non-existent portion 1 kbn in the center portion in the width direction. The back side portion 1b of the paper diaper 1 is contracted in the widthwise direction by the contraction force of the waist elastic member 71. Therefore, when the hook-and-loop fastener 6 is stretched to the outside in the width direction, by stretching in the longitudinal direction as close as possible to the area of the waist elastic member 71, the contraction portion can be easily extended. In addition, the protruding portion 61ap and the engaging portion may be provided at three or more along the longitudinal direction. In this case, the central position hcp should also be set at the position closest to the waist elastic member 71 in the longitudinal direction The protruding part 61ap (engagement part), and connect the center The straight line at the positions hcp becomes the center line CL.

When the central position hcp of the male member 61m (engagement portion) is determined, the "specific position wp" which becomes the reference position in the width direction is usually the center position of the male member 61m in the width direction. However, it does not necessarily need to be correctly located in the center in the width direction, but may be a position deviated from the center in the width direction. In addition, the widthwise inner end or the widthwise outer end of the male member 61m may be used as the specific position wp. In addition, the shape of the male member 61m in FIG. 6 is a rectangular shape, but as long as the center position hcp can be set, it may be circular, triangular, or other shapes.

In addition, at this time, the inner end in the longitudinal direction of the first fixing portion 42b1, that is, the innermost portion 42b1p, is present at an outer side closer to the longitudinal direction than the position where the center line CL passes Ideal. In other words, it is preferable that the first fixing portion 42b1 does not exist on the line through which the center line CL passes.

Since the first fixing portion 42b1 is fixed in a state of being overlapped with the surface sheet 21, the rigidity of the body portion 1k is high in this fixing portion. When the central line CL passes through such a part, the tensile force that should act along the central line CL toward the outside in the width direction is difficult to function at the portion of the first fixing portion 42b1, and the non-existent portion 1kbn must be equalized. Ground extension will become difficult. On the other hand, by arranging the innermost portion 42b1p of the first fixing portion 42b1 on the outer side in the longitudinal direction than the center line CL, the stretching force toward the outer side in the width direction can easily act on the non-existent portion 1kbn The whole, and it can be more easily suppressed The crepe formation has a problem such as 1 kbn in the non-existing part.

Moreover, in this embodiment, regarding the male member 61m (engagement portion), when the position of the outer end in the longitudinal direction of the specific position wp in the width direction is regarded as the outer end position hop, the width The direction is a straight line OL provided on both sides of the width direction of the paper diaper 1 to connect the outer end positions hop of the male members 61m and 61m, and it is desirable to implement a portion that can be disposed through the waist elastic member 71. In addition, the outermost position of the male member 61m in the longitudinal direction may be used as the outer end position hop.

As a result, when the hook-and-loop fastener 61 is stretched outward in the width direction, the stretching force can also easily act on the waist elastic member 71 so that the waist elastic member 71 is stretched outward in the width direction without loosening. Therefore, the non-existent portion 1 kbn formed adjacent to the waist elastic member 71 can be easily elongated in the width direction without slackening.

In addition, regarding the male member 61m (engagement portion), when the position of the inner end in the longitudinal direction of the specific position wp in the width direction is regarded as the inner end position hip, the paper diaper 1 is moved in the width direction A straight line IL provided on both sides in the width direction to connect the inner end positions hip of the male members 61m and 61m is preferably implemented as a portion that can be disposed through the absorbent chip 11. In addition, the innermost position hip may be the innermost position in the longitudinal direction of the male member 61m.

As a result, when the hook and loop fastener 61 is stretched outward in the width direction, the stretching force can easily act on the absorbent chip 11 so that the absorbent chip 11 is stretched outward in the width direction without loosening. Therefore, the non-existent portion 1 kbn formed adjacent to the absorptive chip 11 will not relax It is easy to be stretched toward the wide direction.

In the present embodiment, in the region of the back side portion 1b, the three-dimensional frill forming portion of the end region in the width direction of the surface sheet 21 and the waist elastic member 71 are arranged so as to overlap in the thickness direction. Areas that can expand and contract in the width direction are joined to each other by a hot-melt adhesive.

With such a configuration, when the hook-and-loop fastener 61 is stretched outward in the width direction, a stretching force is easily applied to the three-dimensional frill forming portion. That is, with the stretching force outside in the widthwise direction, as the waist elastic members 71 extend toward the outside in the widthwise direction, the pair of three-dimensional frill forming portions respectively have a force to open toward the outside in the widthwise direction. The three-dimensional frill forming portion is suppressed from falling inward in the width direction. That is, in this region, the three-dimensional frill forming portion can be easily raised, and it is easy to suppress leakage of excrement and the like to the outside of the paper diaper 1.

Furthermore, in this embodiment, the back side flap 1bsf and the hook and loop fastener 61 are composed of different members, and the hook and loop fastener 61 is joined to the outer end of the back side flap 1bsf in the width direction by a hot-melt adhesive or the like. .

Thereby, in the joining portion, the two sheet members constituting the back side flap 1bsf and the hook-and-loop tape 61 are present in the thickness direction so as to overlap. In other words, the hook-and-loop fastener 61 is sandwiched between the three-dimensional hemming sheet 47 and the outer structural sheet 31, and there are three sheet members in the thickness direction of the joining portion. Therefore, the strength of the overlapping portion (that is, the joint portion) between the back side flap 1bsf and the hook and loop fastener 61 becomes higher, and even when the hook and loop fastener 61 is strongly stretched to the left and right, the joint portion can be suppressed Damaged or peeled.

If the back side flap 1bsf and the hook-and-loop fastener 61 are composed of a single member. In this state, when the hook-and-loop fastener 61 is stretched to the left and right, the stress is concentrated at the boundary between the portion forming the back side flap 1bsf and the portion where the hook-and-loop fastener 61 is formed (equivalent to the symbol 61e in FIG. 6 The part shown), and there is a possibility that the hook-and-loop fastener 61 may be torn from the part. In contrast to this, by joining the two with different members as in the present embodiment, the strength of the boundary portion can be increased to the extent that the tensile force from the hook-and-loop fastener 61 can be withstood.

===Other forms of implementation===

Although the above is the description of the embodiment of the present invention, the above-mentioned embodiment is an explanation for making the present invention easy to understand, and should not be interpreted as a description for limiting the present invention. In addition, the present invention can be changed or improved as long as it does not deviate from its intent, and of course the present invention also includes its equivalent.

The disposable diaper 1 can be used in combination with another absorbent cotton pad (not shown) such as a absorbent cotton pad. The absorbent cotton pad can be placed on the skin-side surface of the surface sheet 21 of the disposable paper diaper 1 after use. At this time, the end in the longitudinal direction of the urine-absorbent pad can be inserted into the pocket-shaped space SP and held. When implemented in this way, when the urine absorbent pad is placed on the skin side of the top sheet 21, it can be easily positioned. Furthermore, since the end of the absorbent cotton pad is inserted into the pocket-shaped space SP, when the disposable paper diaper 1 is spread under the body of the wearer, the skin placed on the surface sheet 21 can be placed The end of the side absorbent cotton pad Does not abut the wearer's skin. Therefore, it can also effectively prevent the wearer's skin problems caused by the end portion. In addition, when using the disposable paper diaper 1 as in the embodiment, the vicinity of the end portion formed on the back side near the arc shape is used as a mark, and the center of the disposable paper diaper in the width direction can be used. It can be easily aligned with the center of the absorbent cotton pad in the width direction.

Fig. 7 is a schematic plan view (plan view viewed from the skin side) of the back side portion 1b of the disposable paper diaper 1 of the present embodiment in a natural state. As shown in FIG. 7, it can also be used as an absorbent article characterized in that a pair of first three-dimensional frills spaced apart in the width direction are provided in the main body portion along the longitudinal direction; A pair of second three-dimensional frills located closer to the outer side in the widthwise direction than the first three-dimensional fringe are provided along the long-side direction; the first three-dimensional frill is to arrange the first elastic member in the long side Side direction, and has: a first base end portion that cannot be erected in the width direction, and a first erection that can be erected toward the skin side in the thickness direction using the first base end portion as a fulcrum The second three-dimensional frill is to arrange the second elastic member in the long side direction, and has: a second base end portion arranged in the width direction that cannot stand up, and the second base end The portion is a fulcrum, and a second rising portion that can rise toward the skin side in the thickness direction; and the back-side end portion of the first rising portion is formed to overlap the first three-dimensional frill A first fixing portion that is fixed in the state of the main body portion; and the back-side end portion of the second rising portion is formed to overlap the second three-dimensional frill with the present A second fixing portion that fixes it in the state of the body; the first fixing portion overlaps the expansion and contraction area of the waist elastic member; the first fixing portion is located closer to the long side than the absorbent chip The outer side in the direction; the second fixing portion is sandwiched by the first fixing portion and is separated from the expansion and contraction area of the waist elastic member from the widthwise direction.

In addition, it can be modified as shown below.

As shown in FIG. 7, the second fixing portion is an absorbent article that is present on the outer side closer to the longitudinal direction than the absorbent chip as a characteristic.

As shown in FIG. 4, the shape of the edge of the absorptive chip in the longitudinal direction is such that the central portion of the widthwise direction is longer toward the longer side than the portion of the widthwise end The outer side in the lateral direction protrudes into a curved shape as the characteristic absorbent article.

As shown in FIG. 7, the waist elastic member includes a plurality of linear elastic members along the width direction, and the innermost fixed end of the first fixing portion located in the longitudinal direction is Located at the position of the non-existent portion, at least a part of the first fixing portion is provided among the plurality of linear elastic members from the innermost linear elastic member and the outermost linear in the longitudinal direction In the region sandwiched by the elastic member, it is an absorbent article that is characterized by it.

As shown in FIG. 7, the first fixing portion spans (covers): it is provided by the entire region sandwiched by the innermost linear elastic member and the outermost linear elastic member in the longitudinal direction. Absorbent articles as its characteristics.

As shown in FIG. 7, at the end on the back side, there is formed an area located outside the linear elastic member on the outermost side in the longitudinal direction and contracted as the linear elastic member contracts It is an absorbent article that is characterized by a contraction region longer than the distance between the adjacent linear elastic members in the longitudinal direction.

As shown in FIG. 7, the length of the contracted region in the longitudinal direction is half the length of the region in the longitudinal direction of the region sandwiched between the outermost linear elastic member and the innermost linear elastic member It's still a long time since it is an absorbent article with its characteristics.

Others can also be as follows. FIGS. 8 to 10 are schematic plan views showing enlarged the back side portion 1b of the disposable diaper 1 in other embodiments.

(Aspect 1)

An absorbent article having a body portion having a longitudinal direction, a width direction, and a thickness direction, and comprising: an absorbent chip absorbing liquid, a surface sheet covering the absorbent chip from the skin side in the thickness direction, and the thickness The back sheet that covers the absorbent chip on the non-skin side in the direction is characterized in that: the end of the main body portion in the longitudinal direction constitutes a waist opening, and the end portion is given shrinkage in the width direction Force is provided at the end portion: a waist elastic member extending in the width direction; the body portion is located closer to the long side than the end portion Inwardly, the absorbent chip is present, and the portion between the end portion and the absorbent chip in the body portion is used as both the waist elastic member and the absorbent chip. The non-existent portion of the sheet, at a specific position in the width direction, the sheet-shaped three-dimensional frill forming portion is provided along the long-side direction, and the three-dimensional frill forming portion has an arrangement that is not arranged in the width direction The raised base portion and the raised portion that can be raised toward the skin side in the thickness direction using the proximal end portion as a fulcrum, and the raised portion is caused by the contraction force in the longitudinal direction acting on the raised portion Shrinking in the long-side direction, whereby the rising portion is raised toward the skin side in the thickness direction, and at the end in the long-side direction among the rising portions, the end portion is formed to be fixed The fixed portion lying down on the body portion, and the innermost portion in the longitudinal direction of the fixed portion is located at the non-existent portion.

(Aspect 2)

As shown in FIGS. 8 to 10, the contraction force of the rising portion is given by an elastic member provided on the rising portion along the longitudinal direction, and the fixing portion spans the above The non-existent portion extends from the end of the body portion, and among the elastic members, at the end portion of the body portion In the position part, the above-mentioned contraction force in the longitudinal direction is not generated as the characteristic absorbent article.

(Aspect 3)

As shown in FIG. 8 to FIG. 10, among the elastic members, the part located at the non-existent part position does not generate the contraction force in the longitudinal direction as the characteristic absorbent article.

FIG. 11A is a diagram for explaining the slit provided in the disposable diaper 1. FIG. 11B is a cross-sectional view in the longitudinal direction of the paper diaper 1 folded into a three-fold folded state.

As shown in FIG. 11A, the absorbent chip 11 may be provided with a low basis weight area such as a slit. In this example, slits S1a to S1c are formed in the central region of the absorbent chip 11 in the width direction. The slit S1a is formed in the ventral portion 1a. The slit S1b is formed 1m below the buttocks. The slit S1c is formed in the back side portion 1b. On the outer side of the central region in the width direction, slits S2a to S2c and slits S3a to S3c are formed. The slit S2a and the slit S3a are formed on the ventral portion 1a so as to sandwich the slit S1a. The slit S2b and the slit S3b are formed so as to sandwich the slit S1b at the lower part of the buttocks 1m. The slit S2c and the slit S3c are formed on the back side portion 1b so as to sandwich the slit S1c. Each slit has a lower basis weight than other regions of the absorbent chip 11. That is, at least the central region of the absorbent chip 11 in the width direction is formed to have a lower basis weight than the other regions of the absorbent chip 11.

In this way, by placing the central region of the absorbent chip 11 in the width direction The domain (part of the central area) is formed with a low basis weight. Since creases can be easily formed on the low basis weight, this area can be used as a disposable paper diaper 1 (absorbent cotton pad) when worn. Mark. Therefore, the center of the disposable paper diaper 1 in the width direction and the center of the wearer's body (or the center in the width direction of the absorbent cotton pad) can be easily aligned. In addition, when the cotton pad is installed, the absorbent cotton pad is attached to the body, and when the disposable diaper is installed from the outside, the absorbent body can be easily bent in the long side direction using the slit as the base point In particular, the absorber in the central slit is mountain-folded, so the absorbent cotton pad can be pressed against the body with certainty. In addition, the absorptive chip 11 has a basis weight that increases toward the side in the width direction compared to the central region, so the position of the absorbent pad is not easily shifted, and the absorptive chip can also be prevented during the manufacturing process. Damage etc.

In addition, the paper diaper 1 before use is implemented in a state of being folded into three folds in the longitudinal direction. As shown in FIG. 11A, the paper diaper 1 is provided with three folds of the first fold F1 to the third fold F3. The first crease F1 is formed along the width direction so as to pass through the region of 1 kbn in which the non-existent portion exists. The second fold F2 is formed along the width direction so as to pass through the region between the slit S1c and the slit S1b in the longitudinal direction. The third fold F3 is formed along the width direction so as to pass through the region between the slit S1b and the slit S1a in the longitudinal direction. The non-existent portion 1 kbn forming the first fold F1 has a low rigidity as described above. In addition, since the second fold F2 and the third fold F3 are formed in a smooth area without slits S1a to S1c, the resistance when bending in the longitudinal direction is small. Therefore, with such creases As a base point, the paper diaper 1 can be easily folded in the longitudinal direction.

When folding the paper diaper 1 three times, first, the unfolded paper diaper 1 is folded toward the non-skin side NS in the thickness direction with the first fold F1 as the base point. Next, using the second fold F2 as a base point, the portion of the back side portion 1b of the main body portion 1k is folded so that the portion of the buttocks 1m and the surface of the skin side S in the thickness direction face each other. Next, the third fold F3 is used as a base point so that a part of the skin side S of the ventral portion 1a of the body portion 1k overlaps the non-skin side NS of the back portion 1b of the body portion 1k. With this implementation, the paper diaper 1 can be folded into a small state as shown in FIG. 11B. In addition, among the plurality of folds, the first fold F1 is formed so as to pass through the region of 1 kbn of the non-existent portion, so that the non-existent portion with low rigidity tends to have a tendency to maintain bending. Thereby, when the paper diaper 1 is worn, the pocket-shaped space SP can be easily formed.

1‧‧‧Disposable paper diapers (absorbent articles)

1a‧‧‧ ventral side

1b‧‧‧Back side

1m‧‧‧Lower hip

1asf‧‧‧ ventral flank

1bsf‧‧‧back flank

1k‧‧‧Body

1kaeL‧‧‧ ventral end

1kbeL‧‧‧End of back

1mf‧‧‧thigh frill

11‧‧‧ Absorptive chip

11ew‧‧‧End of the absorbent chip 11 in the width direction

12‧‧‧Chip film sheet

21‧‧‧Surface sheet

30‧‧‧Leakproof sheet

31‧‧‧Construction sheet (back sheet)

31ew‧‧‧Outer edge of outer structure sheet 31

41g1‧‧‧The first three-dimensional frill

41g2‧‧‧The second three-dimensional frill

41k1‧‧‧First base end

41k2‧‧‧2nd base end

41s1‧‧‧First Rising Department

41s1eLa, 41s1eLb‧‧‧‧The end of the first rising portion 41s1 in the longitudinal direction

41s2‧‧‧Second Rising Department

41s2eLa, 41s2eLb‧‧‧‧The end of the second rising portion 41s2 in the longitudinal direction

41sew1 ‧‧‧ The first rising portion 41s1 in the widthwise front end

42a1, 42b1‧‧‧First fixed part

42b2‧‧‧Second fixed part

47‧‧‧Three-dimensional frill

61‧‧‧ Velcro

61a‧‧‧with substrate

61ap‧‧‧Protrusion of substrate 61a in the width direction

61m‧‧‧male component (engagement part)

65‧‧‧The tape with the label attached

71‧‧‧ Elastic waist member

81‧‧‧ Leg elastic member

451‧‧‧The first elastic member for three-dimensional hemming

452‧‧‧The second elastic member for three-dimensional hemming

Claims (10)

An absorbent article is provided with a longitudinal direction, a width direction and a thickness direction, and the body portion in which the abdominal part, the buttocks bottom and the back side part are arranged in the longitudinal direction is provided with an absorbent chip, which is characterized by : The waist-side elastic member extending along the width direction is provided on the back-side end of the body in the long-side direction, and the body-side part is located closer to the long-side direction than the back-side end The inner portion of the upper portion is where the absorbent chip is present, and the portion between the waist elastic member and the absorbent chip of the body portion is regarded as not having the waist elastic member and the absorbent chip In the non-existent part, a sheet-shaped three-dimensional frill forming portion spaced apart from the wide direction is provided along the long-side direction in the main body portion, and the three-dimensional frill forming portion is configured by an elastic member for three-dimensional frills In the longitudinal direction and in the width direction, there are: a base end portion that cannot stand up, and a stand portion that can stand up toward the skin side in the thickness direction using the base end section as a fulcrum. The raised portion is contracted in the long side direction, the raised portion is raised toward the skin side in the thickness direction, and an end portion of the raised portion in the long side direction is formed to overlap the end portion with the A fixed portion that is fixed in the state of the main body portion, and the inner end portion of the fixed portion in the longitudinal direction is located at an outer side closer to the longitudinal direction than the absorbent chip is at the main body portion The back side is formed with a back side wing extending outward from the body portion in the width direction, and the width of the back side wing A pair of hook-and-loop fasteners are provided on both sides in the width direction. The pair of hook-and-loop fasteners are respectively provided with an engaging portion that engages with the abdominal portion when the absorbent article is worn. When the central position in the longitudinal direction of the specific position in the width direction is taken as the central position, the central positions of the pair of the engaging portions along the central line connecting the width directions are tied to the absorptivity The central part of the article in the width direction passes through the non-existing part, and the inner end of the fixed part in the longitudinal direction is located in the non-existing part, and the inner end is located: It is located closer to the outside in the longitudinal direction. The absorbent article according to item 1 of the patent application scope, wherein when the position of the outer end in the longitudinal direction of the specific position in the width direction of the engaging portion is taken as the outer end position, a A straight line connecting the outer end positions of the engaging portion along the width direction passes through the portion where the waist elastic member is disposed in the body portion. The absorbent article according to item 1 or 2 of the patent application scope, in the case where the position of the inner end in the longitudinal direction of the specific position in the width direction of the engaging portion is taken as the inner end position, A straight line connecting the inner end positions of the pair of engagement portions along the width direction passes through the portion where the absorbent chip is arranged in the body portion. If the absorbent article mentioned in item 1 or 2 of the patent application scope, Wherein, a pair of the hook-and-loop fasteners are respectively provided with the engaging portions at a plurality of positions in the longitudinal direction, and the central line passes through: among the plurality of engaging portions provided in the longitudinal direction The center position defined by the engaging portion closest to the position where the waist elastic member is arranged in the longitudinal direction is closest. The absorbent article according to item 1 or 2 of the patent application scope, wherein in the waist elastic member, a region that is stretchable in the width direction is overlapped with the three-dimensional frill forming portion. The absorbent article according to item 1 or 2 of the patent application, wherein the back side flap and the hook-and-loop fastener are composed of different members, and the hook-and-loop fastener is the width of the back side flap The outer end in the width direction. The absorbent article according to item 1 or 2 of the patent application scope, wherein a plurality of fold lines are formed along the width direction to form a base point when the absorbent article is folded toward the long side direction, and formed One of the areas of the above-mentioned polyline passes through the non-existent part. The absorbent article according to item 1 or 2 of the patent application scope, wherein the shape of the edge in the longitudinal direction of the absorbent chip is such that the central portion of the widthwise direction is greater than The portion on the end side in the widthwise direction is more curved toward the outer side in the longitudinal direction shape. The absorbent article according to item 1 or 2 of the patent application scope, wherein at least the central region in the width direction of the absorbent chip is formed to have a lower basis weight than the other regions of the absorbent chip. The absorbent article according to item 1 or 2 of the patent application scope, wherein the waist elastic member includes a plurality of linear elastic members extending along the width direction, and at least a part of the fixing portion is provided In the plurality of linear elastic members, a region sandwiched between the innermost linear elastic member and the outermost linear elastic member in the longitudinal direction.

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