JP2006043124A - Disposable absorptive article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable absorptive article such as a disposable diaper whose wearing form becomes three-dimensional along the build of a wearing person and wearing feeling is excellent. <P>SOLUTION: A waist part 5 and/or a leg part 6 is turned to a three-dimensional curved shape by folding the waist part 5 and/or the leg part 6 roughly in a wedge shape from the end edge to the inner side and forming darts 14, or the waist part 5 and/or the leg part 6 is turned to the three-dimensional curved shape by attaching elastic members 9e-9h roughly in the wedge shape from the end edge to the inner side, which can be extended and contracted in a width direction, under an extended state, and contracting the attached position. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a disposable absorbent article such as a disposable diaper whose wearing form is three-dimensional.

  A disposable diaper in which a pair of stretchable regions elastically stretchable in the width direction is formed on the back waist portion is known (see Patent Document 1). The expansion / contraction region is composed of a collar portion. In this diaper, when the tape fastener is gripped and the back waist portion is expanded outward in the width direction, the heel portion is extended and the leg elastic member is curved. According to Patent Document 1, the leg elastic member is curved, so that the wearer's thigh root portion is annularly surrounded by the leg elastic member.

  However, since the diaper component is a planar material, the wearer's body shape is three-dimensional, so when trying to fit a diaper made of a planar material along the three-dimensional body shape, it is inevitably necessary. Sagging occurs. Therefore, even if the wearer's thigh root is annularly surrounded by the leg elastic member, the wearer's body and the diaper do not fit perfectly, and the diaper may be misaligned during wearing, or may be misaligned. This may cause leakage.

JP 2001-8970 A

  Accordingly, an object of the present invention is to provide a disposable absorbent article such as a disposable diaper that can eliminate the various disadvantages of the above-described prior art.

The present invention is a disposable absorbent article having a waist part and a pair of leg parts,
The waist part and / or the leg part are folded into a substantially wedge shape inward from the edge thereof to form a dart, so that the waist part and / or the leg part have a three-dimensional curved shape, or the waist part and / Or a substantially wedge-shaped elastic member inwardly extending from the edge of the leg portion to the leg portion, which can be expanded and contracted in the width direction, is attached in an extended state, and its attachment position is contracted, and the waist portion and The object is achieved by providing a disposable absorbent article in which the leg portion has a three-dimensional curved shape.

  The absorbent article of the present invention has a three-dimensional shape along the wearer's body shape, so that the absorbent article is not too loose or too tight during wearing, Excellent wearing feeling. Moreover, since there is no excess and deficient part of the structural member of an absorbent article with respect to a wearer's body shape, it is hard to raise | generate a position shift of an absorbent article during wear. Due to this, leakage is less likely to occur. Furthermore, since the pressure on the body by each elastic member arranged on the absorbent article acts uniformly on the entire absorbent article, it is difficult to generate a portion that is partially tightened.

  The present invention will be described below based on preferred embodiments with reference to the drawings. The perspective view of the underpants type disposable diaper which is an example of this invention is shown by FIG. FIG. 2 is an exploded perspective view showing a state in the middle of assembling the diaper shown in FIG. FIG. 3 is a plan view showing a developed state of the outer packaging material in FIG.

  As shown in FIGS. 1 to 3, the diaper 1 of this embodiment includes a liquid-permeable top sheet 2, a liquid-impermeable or water-repellent back sheet 3, and a liquid disposed between both sheets 2 and 3. A substantially vertically long absorbent body 10 having a retentive absorbent core 4 and an outer packaging material 11 disposed on the back sheet 3 side of the absorbent body 10 are provided.

  The outer packaging material 11 has an hourglass shape in which both side edges are bound inward in the central portion in the longitudinal direction, and defines the outline of the diaper. The outer packaging material 11 is divided in the longitudinal direction into an abdominal side A disposed on the wearer's abdominal side, a back side B disposed on the back side, and a crotch C positioned therebetween. The abdomen A and the back B correspond to the longitudinal front and rear ends of the outer packaging material 11, and the crotch C corresponds to the longitudinal center of the outer packaging material 11. In the outer packaging material 11, both side edges A1 and A2 of the ventral side A and both side edges B1 and B2 of the back side B are joined together, and the diaper 1 has a waist opening 5 and a pair of leg openings 6. It is formed. By this joining, a pair of side seal portions S are formed on the left and right side edges of the diaper 1. For this joining, for example, heat sealing, high frequency sealing, ultrasonic sealing or the like is used. The waist opening 5 is a portion located at the waist of the wearer when the diaper 1 is worn, and the leg opening 6 is a portion located at the thigh root of the wearer.

  The top sheet 2, the back sheet 3, and the absorbent core 4 each have a rectangular shape, and are integrated to form a vertically long absorbent body 10. As the surface sheet 2 and the back surface sheet 3, the same material as that conventionally used for this type of diaper can be used. The absorbent core 4 is made of superabsorbent polymer particles and a fiber material, and is covered with tissue paper (not shown).

  As shown in FIG. 2, side cuffs 8, 8 made of a liquid-resistant or water-repellent and breathable material are formed on the left and right sides of the absorbent body 10 in the longitudinal direction. Each side cuff 8 has a fixed end and a free end along the longitudinal direction of the absorbent body 10. The fixed end is fixed to the top sheet 2. Furthermore, the free end is fixed to the topsheet 2 at both ends in the longitudinal direction of the absorbent body 10 (ends in the vertical direction in FIG. 3). On the other hand, a side cuff elastic member 81 is arranged in an expanded state in the vicinity of the free end. Thereby, when the diaper 1 assembled as shown in FIG. 1 is worn, the side member cuff 8 stands up due to the elastic member 81 contracting, and the outflow of liquid in the width direction of the absorbent body 10 is prevented. Is done.

  The outer packaging material 11 has at least two nonwoven fabrics, that is, an outer layer nonwoven fabric 12 and an inner layer nonwoven fabric 13 disposed on the inner surface side of the outer layer nonwoven fabric 12. The outer layer nonwoven fabric 12 forms the outer surface of the diaper 1, and the inner layer nonwoven fabric 13 is joined to the inner surface side of the outer layer nonwoven fabric 12 with an adhesive such as a hot melt pressure-sensitive adhesive.

  A plurality of waist elastic members 51, 51 are arranged along the width direction of the front and rear end portions of the outer packaging material 11 along the front and rear end edges. The waist elastic members 51 and 51 are sandwiched and fixed in an expanded state by the outer layer nonwoven fabric 12 and the inner layer nonwoven fabric 13. The waist elastic members 51, 51 are configured such that when the both side edges A 1, A 2 of the ventral side A of the diaper 1 and the side edges B 1, B 2 of the back side B are joined together, both elastic members 51 at the joint portion. , 51 are arranged so that the end portions of the elastic members 51, 51 are overlapped with each other, or the end portions of the elastic members 51, 51 are located at a position closest to the joint portion. As a result, as shown in FIG. 1, a substantially continuous ring-shaped waist gather is formed in the vicinity of the waist opening 5 of the diaper 1.

  The outer packaging material 11 extends outward from the front and rear end edges of the absorbent body 10, and the extended portion is folded back to the absorbent body 10 side. The wrapped outer packaging material 11 covers the front and rear end portions of the absorber body 10 (that is, the top sheet 2 at the front and rear end portions of the absorber body 10). Instead of this configuration, only the outer layer nonwoven fabric 12 in the outer packaging material 11 is further extended and extended from the portion where the waist elastic members 51 and 51 are sandwiched and fixed by the outer layer nonwoven fabric 12 and the inner layer nonwoven fabric 13. The outer layer nonwoven fabric 12 can be folded back to the absorbent body 10 side.

  Leg part elastic members 61 a and 61 b are arranged on the left and right curved parts of the outer packaging material 11. Each leg part elastic member 61a, 61b is distribute | arranged along the said curved part. Each leg part elastic member 61a, 61b is distribute | arranged between the outer-layer nonwoven fabric 12 and the inner-layer nonwoven fabric 13, and is fixed to both the nonwoven fabrics 12 and 13 in the expansion | extension state by the predetermined joining means. One end of each leg part elastic member 61a, 61b overlaps in the crotch part C. On the other hand, the other end is terminated at the position of each side edge of the ventral side A and the back side B. When each leg part elastic member 61a, 61b joins both side edges A1, A2 of the belly side part A of the diaper 1 and both side edges B1, B2 of the back side part B, both elastic members 61a are joined at the joint part. , 61b are arranged so that the ends thereof overlap each other, or are arranged so that the ends of the elastic members 61a, 61b are positioned at positions closest to the joint portion. As a result, as shown in FIG. 1, a substantially continuous ring-shaped leg gather is formed in the vicinity of the leg openings 6, 6 of the diaper 1.

  In the diaper 1, a large number of elastic members 71 a extending in the width direction of the diaper 1 are disposed between the waist opening 5 and the leg opening 6 in the stomach side A and the back side B of the diaper 1. The elastic member 71a is sandwiched and fixed in an expanded state by the outer layer nonwoven fabric 12 and the inner layer nonwoven fabric 13. The elastic member 71a is configured so that when the side edges A1, A2 of the ventral side A of the diaper 1 and the side edges B1, B2 of the back side B are joined to each other, the elastic member 71a of the ventral side A It arrange | positions so that the edge parts with the elastic member 71a of the back side part B may overlap, or it arrange | positions so that the edge part of the elastic members 71a and 71a may be located in the position nearest to a junction part. As a result, as shown in FIG. 1, gathers are respectively formed in the waistline region 7 in the ventral side A and the back side (not shown) of the diaper 1.

  The elastic member 71 a extends between the left and right side edges of the diaper 1 (that is, the left and right side edges of the outer packaging material 11) and the left and right side edges of the absorbent core 4. And the elastic member 71a does not exist substantially in the site | part in which the absorptive core 4 exists. As a result, the gathers formed in the waistline region 7 are located between the left and right side edges of the diaper 1 and the left and right side edges of the absorbent core 4, and the gathers are substantially at the position where the absorbent core 4 exists. Not formed. As a result, the outer wrapping material 11 does not shrink due to the contraction of the elastic member 71a in the portion where the absorbent core 4 is present even in the mounted state, and the diaper 1 has good appearance and absorption performance. It will be a thing.

  As each elastic member in the diaper 1 of the present embodiment, a stretchable material such as natural rubber, polyurethane resin, urethane foam resin, stretchable nonwoven fabric or hot melt stretchable member is used as a thread (thread rubber) or a strip (flat). (Rubber), net (net) or film is preferably used.

  Thus, in the diaper 1 of the present embodiment, as shown in FIG. 3, in the outer packaging material 11, a plurality of locations in the waist opening 5 of the abdominal side A and the waist opening 5 of the back side B are A plurality of darts are formed by folding inwardly from the end edge in a substantially wedge shape. In FIG. 3, the portions that are folded in a substantially wedge shape are indicated by reference numerals 9a to 9d (hereinafter, this portion is referred to as a folded portion). Here, the substantially wedge shape is not limited to the shape of the folding portions 9a to 9d shown in FIG. 3, but also has a hypotenuse including a curve as shown in FIG. 4 (a), FIGS. 4 (b) and 4 (c). This is a concept including those that are not symmetrical as shown in FIG. 4 and those that become narrower once the width becomes wider toward the tip as shown in FIG. As for these shapes, it is preferable to select an optimal shape in order to make the diaper conform to the three-dimensional shape of the body shape, depending on the body shape part that forms the dart and the difference in body shape depending on the growth stage of the wearer. The folding portions 9 a and 9 b in the ventral side A are located between the side edges A 1 and A 2 of the ventral side A and the left and right side edges of the absorbent core 4. The folding portions 9 c and 9 d in the back side portion B are located between both side edges B 1 and B 2 of the back side portion B and the left and right side edges of the absorbent core 4. The folding portions 9a to 9d extend in a direction substantially coincident with the longitudinal direction of the diaper 1. The folding portions 9a to 9d are positioned so as to cross the elastic member 71a disposed in the waistline region 7. Moreover, the front-end | tip part of the folding parts 9a-9d is located inward rather than the front-back edge of the absorptive core 4. FIG. However, the front end portions of the folding portions 9a to 9d do not exceed the most inwardly located elastic member 71a disposed in the waistline region 7.

  The two folding parts 9a and 9b in the ventral part A have the same shape. Similarly, the two folded portions 9c and 9d in the back side portion B have the same shape. The folding portions 9a and 9b in the ventral side A and the folding portions 9c and 9d in the dorsal side portion 9 are located at opposing positions. Furthermore, the folding part 9a and the folding part 9c located in the opposing position are the same shape. Similarly, the folding part 9b and the folding part 9d located at the opposite positions have the same shape.

  A plurality of darts 14 are formed in the waist opening 5 as shown in FIG. 1 by folding the folded portion 9a toward the skin facing surface side of the diaper 1 and fixing the folded state. Dart is a term used in clothing studies, which means that a piece of cloth is folded and stopped in order to create a three-dimensional roundness or bulge in the clothing according to the irregularities of the body shape. The dart 14 is formed by fixing the folded-in part 9a in a loop shape as shown in FIG. 5 (a), or the folded-in part 9a as shown in FIG. 5 (b). It is formed by bonding the entire inner surface of each. In order to form the dart 14, the folded portion 9 folded in a substantially wedge shape is fused by, for example, heat sealing, or bonded with a hot melt adhesive.

  By forming the dart 14 in the waist opening 5, the waist area of the diaper 1 composed of the abdominal part A and the dorsal part B has a three-dimensionally curved shape in which the skin facing surface of the diaper 1 is concave. . This three-dimensional curved shape is completely different from the curved shape of the waistline region formed by the contraction of the waist elastic member 51 and the elastic member 71a. Specifically, the curved shape of the waistline region formed by the contraction of the waist elastic member 51 and the elastic member 71a is formed by uniformly contracting the entire diaper, and the three-dimensional shape of the wearer's body As a result, wearing such a diaper may be partly too loose or conversely partly too tight. On the other hand, the three-dimensional curved shape formed by the dart 14 in the present invention closely follows the three-dimensional shape of the wearer's body. In other words, when the diaper 1 is worn, the three-dimensional curved shape fits along the waist (abdomen) of the wearer who is also three-dimensional. In other words, it is neither too loose nor too tight. As a result, the wearing feeling on the waist (belly circumference) of the wearer becomes extremely good. If the waistline does not conform to the wearer's body shape, the loose material tends to move to a portion where the material is not tight enough, so the position of the diaper is likely to shift. According to 1, since such an excessive or insufficient state of the material hardly occurs, the displacement of the diaper 1 in the waist opening 5 hardly occurs. As a result, leakage from the waist opening 5 is less likely to occur.

  As is apparent from the above description, the dart 14 in the waist opening 5 has the planar diaper 1 constituting member (the outer packaging material 11 in this embodiment) along the wearer's waist (belly circumference). In this case, it is effective to be formed in a portion where sagging occurs.

  As a result of the study by the present inventors, in the waist opening 5 of the diaper 1 of the present embodiment, the four portions indicated by reference numerals 9a to 9d in FIG. It has been confirmed. Among these portions, the portions indicated by reference numerals 9a and 9b are located approximately in the middle between the longitudinal center line L1 and both side edges A1 and A2 of the ventral side A. On the other hand, the portions indicated by reference numerals 9c and 9d are located approximately in the middle between the longitudinal center line L1 and both side edges B1 and B2 of the back side portion B.

  In the diaper 1 of this embodiment, apart from the darts 14 formed in the waist opening 5, a substantially wedge-shaped elastic member (hereinafter referred to as “inward”) from a plurality of locations in the left and right leg openings 6. 9e to 9h) (referred to as wedge-shaped elastic members). Specifically, wedge-shaped elastic members 9e to 9h are attached on the skin facing surface of the outer packaging material 11. The wedge-shaped elastic members 9e to 9h can contract at least in the width direction. The wedge-shaped elastic members 9e to 9h are attached to the leg opening 6 in an extended state.

  The wedge-shaped elastic members 9e and 9f are attached to the leg opening 6 near the stomach side A in the diaper 1. On the other hand, the wedge-shaped elastic members 9g and 9h are attached to the leg opening 6 near the back side B in the diaper 1. Each wedge-shaped elastic member 9e-9h is attached to the symmetrical position about the vertical center line L1 of the diaper 1.

  The wedge-shaped elastic members 9e and 9f attached to the leg opening 6 near the ventral side A are different in size and are more belly than the wedge-shaped elastic member 9e attached to the diaper 1 near the lateral center line L2. The wedge-shaped elastic member 9f attached closer to the side portion A has a larger shape. The wedge-shaped elastic member 9e and the wedge-shaped elastic member 9f are substantially similar. The wedge-shaped elastic members 9e and 9f are attached so as to be inclined with respect to the width direction of the diaper 1 so as to face the direction of the waist opening 5 of the ventral side A. The wedge-shaped elastic members 9e and 9f are attached so as not to overlap the absorbent core 4.

  The wedge-shaped elastic members 9g and 9h attached to the leg opening 6 near the back side B are different in size, and are different from the wedge-shaped elastic member 9g attached near the lateral center line L2 of the diaper 1. The wedge-shaped elastic member 9h attached closer to the side portion B has a larger shape. The wedge-shaped elastic member 9g and the wedge-shaped elastic member 9h are substantially similar. The wedge-shaped elastic members 9g and 9h are attached so as to be inclined with respect to the width direction of the diaper 1 so that the front ends thereof face the direction of the waist opening 5 of the back side portion B. The wedge-shaped elastic members 9g and 9h are attached so that a part thereof, specifically, a portion on the distal end side overlaps the absorbent core 4. It is preferable that the absorbent core 4 is not joined to the outer packaging material 11 in a portion overlapping the wedge-shaped elastic members 9g and 9h. This is because the outer packaging material 11 is effectively contracted by the contraction of the wedge-shaped elastic members 9g and 9h.

  In the diaper 1 after the wedge-shaped elastic members 9e to 9h are attached, the wedge-shaped elastic members 9e to 9h contract in the relaxed state (natural state). As a result of the shrinkage, the leg opening 6 has a three-dimensionally curved shape on the skin facing surface side of the diaper 1 in the same manner as when the dart 14 described above is formed in the leg opening 6. When the diaper 1 is worn, this three-dimensional curved shape will closely follow the wearer's thigh, which is also three-dimensional. As a result, in addition to the waist (abdomen) of the wearer, the feeling of wearing on the thigh is also extremely good. Further, the diaper 1 is not easily displaced in the leg opening 6. As a result, leakage from the leg opening 6 is less likely to occur.

  As is clear from the above description, the wedge-shaped elastic members 9e to 9h in the leg opening 6 are configured so that the planar component member of the diaper 1 (in this embodiment, the outer packaging material 11) extends along the thigh of the wearer. When trying to fit, it is effective that it is attached to the part where sagging occurs.

  As a result of the study by the present inventors, in the leg opening 6 of the diaper 1 of the present embodiment, the four portions indicated by reference numerals 9i to 9l in FIG. It has been confirmed. Of these portions, the portions indicated by reference numerals 9i and 9j are positions closer to the ventral side A than the lateral center line L2. The portions indicated by reference numerals 9k and 9l are positions closer to the back side portion B than the horizontal center line L2. The portions indicated by reference numerals 9i and 9j are located closer to the lower end of the side edge of the ventral side A than the middle between the horizontal center line L2 and the lower end of the side edge of the ventral side A. On the other hand, the portions indicated by reference numerals 9k and 9l are located approximately in the middle between the horizontal center line L2 and the lower end portion of the side edge of the back side portion B.

  The wedge-shaped elastic members 9e to 9h are constituted by a substantially wedge-shaped elastic sheet. Alternatively, as shown in FIG. 6 (a), a plurality of elastic strands 16 extending in the width direction are sandwiched and fixed between two substantially wedge-shaped inelastic sheets 15 and 15 in an expanded state. Yes. Alternatively, as shown in FIG. 6 (b), a plurality of elastic strands 16 extending in the width direction are sandwiched and fixed between two substantially wedge-shaped inelastic sheets 15 and 15 each having an oblique side including a curve. It may be a thing. In the case shown in FIG. 6 (b), the elastic strands 16 are offset and arranged at positions near the wide portion and the tip of the non-elastic sheet 15, respectively. Elastic strands are not arranged. The inelastic sheets 15 and 15 shown in FIG. 6B may have a substantially wedge shape whose hypotenuse does not include a curve.

  When the wedge-shaped elastic members 9e to 9h are attached to the leg opening 6, they are attached in an extended state. At the time of attachment, the part to which the wedge-shaped elastic members 9e to 9h are attached in the leg opening 6 (this part is composed of the outer packaging material 11) may be in a flat state as it is, or may be in a state where it is gathered.

  The wedge-shaped elastic members 9e to 9h are attached so that the contraction force is higher than that of the other elastic members existing in the regions in contact with the wedge-shaped elastic members 9e to 9h. Specifically, since the wedge-shaped elastic members 9e to 9h are attached to the leg opening 6 so as to intersect the leg elastic members 61a and 61b, which are other elastic members, the wedge-shaped elastic members 9e to 9h contract. The force is set to be higher than the contraction force of the leg elastic members 61a and 61b. As a result, when the wearer's undercarriage changes due to the wearer's movement, the leg elastic member expands and contracts following the change, whereas the wedge-shaped elastic member is difficult to expand and contract, so that the three-dimensional curve The shape is maintained. Here, the contraction force refers to a force that attempts to return to a natural state when the wedge-shaped elastic member is extended. Further, the stretched state refers to a state where the wedge-shaped elastic member is stretched to the maximum, and the natural state refers to a state where no force is applied to the wedge-shaped elastic member.

  Since the diaper 1 of the present embodiment having the above configuration is a three-dimensional shape that conforms to the three-dimensional shape of the wearer's body, as described above, the diaper 1 is excellent in wearing feeling and is in a position being worn. Misalignment and leakage are unlikely to occur. In addition, since the pressure on the body by each elastic member acts uniformly on the entire diaper, it is difficult to generate a portion that is partially tightened. That is, the diaper 1 abuts the wearer's body with a surface (not a line or a point), and the surface pressure is low. In addition, even if the tummy and suspension dimensions change due to the wearer's movement, the three-dimensional shape that follows the three-dimensional shape of the body is maintained. It is difficult for a strong part to occur, and as a result, the wear feeling during operation is excellent.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, in the above embodiment, the dart 14 is formed in the waist opening 5, but a dart may be formed in the leg opening 6 instead of or in addition to this. Moreover, in the said embodiment, although the wedge-shaped elastic members 9e-9h were attached to the leg opening part 6, you may attach a wedge-shaped elastic member to the waist opening part 5 instead of or in addition to this.

  Moreover, the formation position and number of the darts 14 or the attachment position and number of the wedge-shaped elastic members 9e to 9h are not limited as long as the wearing form of the diaper conforms to the three-dimensional shape of the wearer.

  In the embodiment, the wedge-shaped elastic members 9e and 9f are positioned so as not to overlap the absorbent core 4. Instead, the wedge-shaped elastic members 9e and 9f are positioned so as to overlap the absorbent core 4. You may let them. When the wedge-shaped elastic members 9e and 9f overlap the absorbent core, it is preferable that the absorbent core is not joined to the outer packaging material in the overlapping portion. Or it is preferable that the absorptive core is notched in the said overlapping part.

  Moreover, in the said embodiment, although the part which overlaps with the wedge-shaped elastic members 9g and 9h in the absorptive core 4 was not joined with the outer packaging material 11, it replaced with this and the wedge-shaped elastic member 9g in the absorptive core 4 was replaced. , 9h may be cut out.

  In the above embodiment, the wedge-shaped elastic members 9g, 9h are positioned so as to overlap the absorbent core 4, but instead, the wedge-shaped elastic members 9g, 9h are positioned so as not to overlap the absorbent core 4. You may let them.

  Moreover, in the said embodiment, although the folding parts 9a-9d which form the dart 14 were located so that it might not overlap with the absorptive core 4, it replaces with this and is positioned so that a folding part may overlap with the absorptive core 4 You may let them. When the folding part which forms a dart overlaps with the absorptive core 4, it is preferable that the absorptive core 4 is not joined to the outer packaging material in the said overlapping part. Or it is preferable that the absorptive core 4 is notched in the said overlapping part.

  Moreover, in the said embodiment, although the folding parts 9a-9d were folded in the skin opposing surface side of the diaper 1, it may replace with this and a folding part may be folded in the diaper outer surface side.

  Moreover, in the said embodiment, although the wedge-shaped elastic members 9e-9h were attached on the outer packaging material 11, it replaced with this and the position which attaches the wedge-shaped elastic member in the outer packaging material 11 was notched, and the notch was notched. A wedge-shaped elastic member may be attached so as to cover the portion.

  Moreover, in the said embodiment, although the dart 14 was formed in the outer packaging material 11 and the wedge-shaped elastic members 9e-9h were attached, it replaces with this and a liquid-permeable surface sheet and liquid-impermeable or water-repellent In a disposable diaper provided with a back sheet, the top sheet and / or the back sheet defining the outline of the diaper, a dart may be formed on the top sheet and / or the back sheet, or a wedge-shaped elastic member may be attached Good.

  Moreover, although the diaper of the said embodiment was a pants type, this invention is applicable similarly to another type of diaper. Specifically, the diaper is a deployment type diaper in which tape fasteners are attached to the left and right sides of one end in the longitudinal direction, and extends laterally from the left and right sides of the one end in the longitudinal direction. The present invention can be similarly applied to a diaper in which a pair of fixing belts that can be locked to each other on the front side is attached.

It is a perspective view which shows the underpants type disposable diaper which is an example of the disposable absorbent article of this invention. It is a disassembled perspective view which shows the state in the middle of assembling the diaper shown in FIG. It is a top view which shows the expansion | deployment state of the outer packaging material in FIG. It is a schematic diagram which shows the shape of the part woven in a substantially wedge shape. It is a top view which shows the shape of a dart. It is a schematic diagram which shows the structure of a wedge-shaped elastic member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pants type disposable diaper 2 Top sheet 3 Back sheet 4 Absorbent core 5 Waist opening 6 Leg opening 7 Girth area 9a, 9b, 9c, 9d Folding part 9e, 9f, 9g, 9h Wedge-shaped elastic member 14 Darts

Claims (10)

A disposable absorbent article having a waist part and a pair of leg parts,
The waist part and / or the leg part are folded into a substantially wedge shape inward from the edge thereof to form a dart, so that the waist part and / or the leg part have a three-dimensional curved shape, or the waist part and / Or a substantially wedge-shaped elastic member inwardly extending from the edge of the leg portion to the leg portion, which can be expanded and contracted in the width direction, is attached in an extended state, and its attachment position is contracted, and the waist portion and A disposable absorbent article in which the leg part has a three-dimensional curved shape.   The said dart or the said elastic member is formed or attached to the part which produces slack, when trying to make the structural member of a planar absorbent article follow a wearer's body. Disposable absorbent articles.   3. The disposable absorbent article according to claim 1, wherein the dart is formed by fusing a portion folded in a substantially wedge shape by heat sealing or bonding with a hot melt pressure-sensitive adhesive.   2. The elastic member is formed of a substantially wedge-shaped elastic sheet, or a plurality of elastic strands extending in the width direction are sandwiched and fixed between two substantially wedge-shaped non-elastic sheets. Or the disposable absorbent article of 2.   The disposable absorbent article according to claim 4, wherein the elastic member is attached so as to have a higher contraction force than other elastic members existing in a region in contact with the elastic member.   It has an absorbent body and an outer packaging material that is disposed on the back sheet side of the absorbent body and defines the outline of the absorbent article, and the outer packaging material has a dart or is attached to the elastic member The disposable absorbent article according to any one of claims 1 to 5.   The disposable absorbent article according to any one of claims 1 to 5, wherein a dart is formed on the top sheet and / or the back sheet, or the elastic member is attached.   The disposable absorbent article according to any one of claims 1 to 7, wherein the disposable absorbent article is of a pants type having a waist opening and a pair of leg openings.   The disposable absorbent article according to any one of claims 1 to 7, wherein the disposable absorbent article is a development type to which a tape fastener is attached. The disposable absorbent article according to any one of claims 1 to 7, wherein a pair of fixing belts that extend laterally from the left and right side portions and that can be locked to each other on the front side of the wearer's body are attached.

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