Pants-type disposable diapers

Abstract

To improve the appearance (appearance quality) of projecting portions of seal joint parts at both sides in an underpants type disposable diaper.SOLUTION: An underpants type disposable diaper 100 is configured such that a waist part corresponding to the waist of a wearer is formed by sealing and joining a part (seal joint part 34) along a longitudinal direction L in a state that side parts 31b, 31c in a width direction W in a front side part 31 in the longitudinal direction L, and side parts 33b, 33c in the width direction W in a rear side part 33 are overlapped; external parts in the width direction W from the seal joint parts 34 form folding parts 31d, 31e, 33d, 33e folded to a central side in the width direction W from the outside of the waist part; and the folding parts 31d, 31e, 33d, 33e cover the seal joint parts 34.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a pants-type disposable diaper. [Background technology]

[0002] Pants-type disposable diapers (hereinafter simply referred to as pants-type diapers) have sealed joints formed on both sides of the waist circumference portion corresponding to the waist circumference of the wearer. The pants-type diaper is formed by folding a diaper fabric extending in the longitudinal direction from the lower abdomen to the crotch and buttocks of the wearer near the longitudinal middle portion to face a front portion (front portion) and a rear portion (buttocks side) of the fabric, overlapping both widthwise sides of the front portion and both widthwise sides of the rear portion, and joining the respective sides together by sealing (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-169730 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned pants-type diaper, the seal joints on both sides are hardened, so that when a wearer wears the diaper, the seal joints protrude outward from the body. Since there is no such protruding part in ordinary underwear, there is a demand for improvement in the appearance of the protruding part.

[0005] The present invention has been made in consideration of the above circumstances, and has an object to provide a pants-type disposable diaper that can improve the appearance (appearance quality) of both side portions of the pants-type disposable diaper. [Means for solving the problem]

[0006] The present invention is a pants-type disposable diaper in which a waist portion corresponding to the waist circumference of a wearer is formed by overlapping a widthwise side portion of one longitudinal portion with a widthwise side portion of the other longitudinal portion and joining portions of the sides along the longitudinal direction, and the portions on the widthwise outer side of the joined portions each form a fold-back portion that is folded back from the outside of the waist portion toward the widthwise center, and the fold-back portion covers the joined portions. Effect of the Invention

[0007] According to the pants-type disposable diaper of the present invention, the appearance (appearance quality) of both side portions can be improved. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a plan view showing a pants-type diaper. [Diagram 2] FIG. 2 is a development view showing the state of the pants-type diaper before it is formed into a pants-type shape. [Diagram 3] 3 is a cross-sectional view taken along the line AA in FIG. 2. [Figure 4] FIG. 3 is a diagram showing the pants-type diaper shown in FIG. 2 folded in half in the longitudinal direction. [Diagram 5] FIG. 2 is a perspective view showing an imaginary state in which the pants-type diaper shown in FIG. 1 is worn by a wearer. [Figure 6] 6 is a cross-sectional view of the pants-type diaper after sealing has been performed, taken along the line BB in FIG. 5. FIG. [Figure 7] 6 is a cross-sectional view of the pants-type diaper after sealing has been performed, taken along line CC in FIG. 5. FIG. [Figure 8] 7 is a diagram showing details of a portion D surrounded by a circular dashed line including a side portion in the width direction W in FIG. 6, and shows the state before the folded-back portion is folded back. FIG. [Figure 9]7 is a diagram showing details of a portion D surrounded by a circular dashed line including a side portion in the width direction W in FIG. 6, and shows the state after the folded-back portion has been folded back. FIG. [Figure 10] FIG. 2 is a partial perspective view showing a relationship between an elastic thread provided on a waist portion of a pants-type diaper and a folded-up portion before the folded-up portion is folded up. [Figure 11] FIG. 2 is a partial perspective view showing the relationship between the elastic thread provided on the waist portion of the pants-type diaper and the folded-up portion after the folded-up portion has been folded up. [Figure 12] This is a cross-sectional view taken along the longitudinal direction L, showing a configuration in which the back sheet and the gather pressing sheet are joined with hot melt, and at each folded-back portion, the thread rubber is joined to the back sheet but not joined to the gather pressing sheet. [Figure 13] 9 is a cross-sectional view corresponding to FIG. 8 , showing a configuration in which rubber thread is not disposed in a range from an end edge to a predetermined position in the width direction W of the folded-back portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, a pants-type disposable diaper 100 (hereinafter simply referred to as pants-type diaper 100), which is one embodiment of a pants-type disposable diaper according to the present invention, will be described with reference to the drawings.

[0010] FIG. 1 is a plan view showing a pants-type diaper 100, FIG. 2 is a development view showing the pants-type diaper 100 before it is formed into a pants shape, FIG. 3 is a cross-sectional view taken along line AA in FIG. 2, and FIG. 4 is a view showing the pants-type diaper 100 shown in FIG. 2 folded in half in the longitudinal direction.

[0011] In addition, Figure 5 is a hypothetical perspective view showing the pants-type diaper 100 shown in Figure 1 being worn by a wearer, Figure 6 is a cross-sectional view of the pants-type diaper 100 after sealing, taken along line BB in Figure 5, and Figure 7 is a cross-sectional view of the pants-type diaper after sealing, taken along line CC in Figure 5.

[0012] The pants-type diaper 100 shown in Fig. 1 is one embodiment of a pants-type disposable diaper according to the present invention. The pants-type diaper 100 is formed in a pants-type shape that can be worn in the same way as normal underwear without using fastening tapes or the like, and can be worn by a wearer.

[0013] The pants-type diaper 100 includes an outer body 10 formed into a pants shape and an inner body 20 disposed on the inner side of the outer body. Before being formed into a pants shape, the pants-type diaper 100 is formed in an unfolded state extending in the longitudinal direction L across a front portion 31 (one portion) corresponding to the lower abdomen on the front side of the wearer, a crotch portion 32 (portion between the front portion and the rear portion) corresponding to the crotch of the wearer, and a rear portion 33 (the other portion) corresponding to the buttocks on the rear side of the wearer, as shown in Fig. 2.

[0014] 3, the exterior body 10 is formed by laminating a back sheet 11, a gather pressing sheet 12, and a leakage prevention sheet 13 in this order. The back sheet 11 and the gather pressing sheet 12 are bonded together, for example, with a hot melt, and the gather pressing sheet 12 and the leakage prevention sheet 13 are also bonded together, for example, with a hot melt.

[0015] In addition, rubber thread 15 extending in a width direction W perpendicular to the longitudinal direction L is disposed between the back sheet 11 and the gather pressing sheet 12. The rubber thread 15 is an elastic member, and in a state stretched within its elastic deformation range, is sandwiched between the back sheet 11 and the gather pressing sheet 12 and bonded to the back sheet 11 and the gather pressing sheet 12, respectively, by, for example, hot melt.

[0016] The back sheet 11 and the gather holding sheet 12 have a portion corresponding to the front portion 31, a portion corresponding to the crotch portion 32, and a portion corresponding to the rear portion 33, and form the overall shape of pants, but the leakage prevention sheet 13 is formed only by a portion corresponding to a part of the front portion 31 and a portion corresponding to a part of the rear portion 33, and does not have a portion corresponding to the crotch portion 32.

[0017] Therefore, the exterior body 10 has a three-layer region of the back sheet 11, the gather holding sheet 12, and the leak prevention sheet 13, and a two-layer region of the back sheet 11 and the gather holding sheet 12.

[0018] 3, the inner body 20 is formed by laminating a water-repellent sheet 21, an absorbent body 22, and a top sheet 23 in this order. The water-repellent sheet 21 and the absorbent body 22 are joined together, for example, with a hot melt, and the absorbent body 22 and the top sheet 23 are also joined together, for example, with a hot melt. A second sheet may be further provided between the top sheet 23 and the absorbent body 22.

[0019] The water-repellent sheet 21 is bonded to the gather holding sheet 12 of the outer body 10, for example, by hot melt. As a result, the inner body 20 and the outer body 10 are integrated to form the pants-type diaper 100. As shown in Fig. 3, an end 13b of the leakage prevention sheet 13 opposite to the rear end 33a in the longitudinal direction L of the pants-type diaper 100 is not bonded to the gather holding sheet 12 and is disposed so as to cover the end of the inner body 20.

[0020] Then, in the unfolded pants-type diaper 100, the inner body 20 is folded inward near the middle part in the longitudinal direction L indicated by the dotted line in Figure 2, so that the end part 31a in the longitudinal direction L of the front part 31 and the end part 33a in the longitudinal direction L of the rear part 33 are overlapped, and the front part 31 and the rear part 33 are overlapped facing each other as shown in Figure 4.

[0021] In this state, both side portions 31b, 31c within a certain length range from both ends of the front portion 31 in the width direction W (direction perpendicular to the longitudinal direction L) and both side portions 33b, 33c within a certain length range from both ends of the rear portion 33 in the width direction W are overlapped, and among the overlapping corresponding side portions 31b, 33b and side portions 31c, 33c, portions (parts) at a specified distance from both ends of the width direction W are joined by heat welding with a seal along the longitudinal direction L. In Fig. 4, the portion joined by the seal is indicated by a dashed line as a seal joint 34.

[0022] In the pants-type diaper 100 thus formed, the front portion 31 and the rear portion 33 are connected to each other at two seal joints 34, 34 on both sides to form a waist portion through which the torso of the wearer passes, as shown in Fig. 4. In the pants-type diaper 100, both side edges 32a, 32b (see Figs. 2 and 4) in the width direction W which form the narrowed portion of the crotch portion 32 each form a leg portion through which the thighs of the wearer pass.

[0023] The pants-type diaper 100 formed into a pants-type is in a state in which the back sheet 11 of the exterior body 10 is disposed on the outermost surface side.

[0024] Here, the two side portions 31b, 33b, 31c, and 33c in the width direction W, including the seal joint 34 of the pants-type diaper 100, will be described in detail.

[0025] 5, in the pants-type diaper 100, of both side portions 31b, 31c of the front portion 31, portions 31d, 31e that are on the outer side of the seal joints 34, 34 in the width direction W are folded from the outer side of the waist portion toward the center in the width direction W to form folded-back portions. The folded-back portions 31d, 31e cover the seal joints 34, 34 from the outside, respectively.

[0026] In the pants-type diaper 100, the portions 33d, 33e of the side portions 33b, 33c of the rear portion 33 that are on the outer side in the width direction W of the seal joints 34, 34 are folded from the outer side of the waist portion toward the center in the width direction W to form the folded-back portions 33d, 33e. The folded-back portions 33d, 33e cover the seal joints 34, 34 from the outside.

[0027] In addition, when the pants-type diaper 100 is worn as shown in Figure 5, the upper part of the waist area (the upper part including the end 31a of the front portion 31 and the end 33a of the rear portion 33) is a three-layer area of ​​the outer casing 10 consisting of the back sheet 11, the gather holding sheet 12, and the leakage prevention sheet 13, and therefore, as shown in Figure 6, the back sheet 11, the gather holding sheet 12, and the leakage prevention sheet 13 are layered in this order from the outer surface side.

[0028] In addition, in the pants-type diaper 100, the lower part of the waist area (the lower part close to the leg area) is a two-layer area of ​​the outer body 10 consisting of a back sheet 11 and a gather holding sheet 12, so that the back sheet 11 and the gather holding sheet 12 are laminated in that order from the outer surface side, as shown in Figure 7.

[0029] 8 and 9 are diagrams showing details of portion D surrounded by a circular dotted line including side portions 31b, 33b in the width direction W in FIG. 6, with FIG. 8 showing the state before folded-back portions 31d, 33d are folded back, and FIG. 9 showing the state after folded-back portions 31e, 33e are folded back.

[0030] Here, the details of the side portions 31b, 33b including the seal joint portion 34 and the folded-back portions 31d, 33d will be described using the upper portion of the waist portion as an example. The lower portion of the waist portion, which is a two-layer region of the exterior body 10, has the same functions and effects as the upper portion of the waist portion, except that the leakproof sheet 13 is not arranged.

[0031] Moreover, the side portions 31c, 33c including the other seal joint portion 34 and the folded-back portions 31e, 33e have the same functions and effects as the side portions 31b, 33b.

[0032] 8, the folded-back portions 31d, 33d are portions formed to extend outward in the width direction W beyond the seal joint portion 34. At the seal joint portion 34, the front portion 31 and the rear portion 33 are joined together, so that the front portion 31 and the rear portion 33 are integrated, but the folded-back portions 31d, 33d are not joined together, so that the folded-back portions 31d, 33d are separated from each other.

[0033] The folded-back portions 31d, 33d are formed so that the length W2 along the width direction W is longer than the length W1 along the width direction W of the seal joint 34. Specifically, the length W1 of the seal joint 34 is, for example, 4 mm, and the length W2 of the folded-back portions 31d, 33d is, for example, 5 mm or more. The length W1 of the seal joint 34 and the length W2 of the folded-back portions 31d, 33d are not limited to the specific numerical values ​​described above, and it is only necessary that the length W2 of the folded-back portions 31d, 33d is longer than the length W1 of the seal joint 34.

[0034] The folded-back portions 31d, 33d are located on each side of the seal joint 34 in the width direction W, and are folded back from the outside of the waist portion toward the center in the width direction W as shown in Figure 9. Since the length W2 of the folded-back portions 31d, 33d is longer than the length W1 of the seal joint 34, the folded-back portions 31d, 33d cover and conceal the seal joint 34.

[0035] As a result, when the pants-type diaper 100 is worn by a wearer, as shown in FIG. 5, the seal joint portion 34 protruding outward is not visible from the outside.

[0036] The seal joint 34 protruding outward gives the appearance of a diaper. However, as described above, in the pants-type diaper 100 of the present embodiment, the seal joint 34 is not visible from the outside, and therefore the appearance of a diaper is prevented or suppressed, thereby improving the appearance quality.

[0037] 10 and 11 show the thread bands provided around the waist of the pants-type diaper 100. Mu 15 and10 is a partial perspective view showing the relationship between folded-back portions 31d (31e) and 33d (33e), FIG. 10 shows the state before folded-back portions 31d (31e) and 33d (33e), and FIG. 11 shows the state after folded-back portions 31d (31e) and 33d (33e).

[0038] The folded-back portions 31d, 31e, 33d, and 33e of the pants-type diaper 100 may be folded back toward the center in the width direction W by forming creases at the boundary between the folded-back portions 31d, 31e, 33d, and 33e and the seal joint 34 from the outside of the waist to the center in the width direction W. For example, as shown in FIG. 10, Mu 15 etc. Alternatively, the folded-back portions 31d (31e), 33d (33e) may be folded back toward the center in the width direction W by utilizing the elastic force of the elastic member.

[0039] Specifically, the pants-type diaper 100 has a stretchable elastic band around the waist in the width direction W. Mu 15 Multiple ones are provided in the vertical direction (longitudinal direction L).

[0040] And thread gourd Mu 15 is In a state where the thread is stretched within an elastically deformable range, the thread is disposed between the back sheet 11 and the gather pressing sheet 12 and joined to the back sheet 11 and the gather pressing sheet 12. Mu 15 is As shown in FIG. 10, the sealing portion 34 and the folded-back portions 31d and 33d are provided with the sealing portion 34 and the folded-back portions 31d and 33d.

[0041] Here, Mu 15 On the other hand, the stiffness of the back sheet 11, which is the outer sheet, is set to 100%. Mu 15 On the other hand, if the rigidity is set lower than that of the gather pressing sheet 12, which is the sheet on the inner side, the string rubber disposed between the back sheet 11 and the gather pressing sheet 12 in a stretched state will Mu 15 is The elastic force generated by being stretched causes it to shrink back to its natural state before being stretched.

[0042] This thread Mu 15 When it shrinks, Mu 15 The surface side joined to the back sheet 11, which has a relatively low rigidity, shrinks more than the surface side joined to the gather pressing sheet 12, which has a relatively high rigidity.

[0043] As a result, the folded-back portions 31d and 33d are respectively formed such that the back sheet 11 is Mu 15 On the other hand, the inner side, the gather pressing sheet 12 is Mu 15 As shown in FIG. 11, the folded-back portions 31d, 33d are each folded back from the outside toward the center in the width direction W so that the back sheet 11 faces the seal joint portion 34.

[0044] In this way, the pants-type diaper 100 has a string fastener that is pre-installed around the waist. Mu 15 etc. By utilizing the elastic force of the elastic member and the difference in rigidity between the relatively inner sheet (gather holding sheet 12) and the relatively outer sheet (back sheet 11), each of the folded portions 31d, 33d, 31e, 33e can be folded toward the center in the width direction W without forming creases at the boundaries between each of the folded portions 31d, 33d, 31e, 33e and the seal joint 34.

[0045] In addition, the configuration in which the rigidity of the back sheet 11 is set relatively lower than the rigidity of the gather pressing sheet 12 includes not only a configuration in which the rigidity of the back sheet 11 is set lower than the rigidity of the gather pressing sheet 12, but also a configuration in which the rigidity of the gather pressing sheet 12 is set higher than the rigidity of the back sheet 11.

[0046] The configuration in which the rigidity of the back sheet 11 is set lower than the rigidity of the gather holding sheet 12 may be achieved, for example, by making the rigidity of the fabric of the back sheet 11 itself lower than the rigidity of the fabric of the gather holding sheet 12 itself, or it can also be achieved by forming cuts in part or the entire surface of the back sheet 11 at each folded-back portion 31d, 33d, 31e, 33e, or by reducing the basis weight of the back sheet 11.

[0047] In addition, a configuration in which the rigidity of the back sheet 11 is set lower than the rigidity of the gather pressing sheet 12 can also be achieved by creating a fold in the back sheet 11 at portion E shown by the dotted line in Figure 10, near the boundary with the seal joint 34 of each folded portion 31d (31e), 33d (33e).

[0048] Furthermore, by orienting the fibers of the fabric forming the back sheet 11, for example, along the longitudinal direction L, the back sheet 11 can be made easier to bend in the width direction W compared to the gather retainer sheet 12, the fibers of which are not oriented along the longitudinal direction L, and each of the folded-over portions 31d, 33d, 31e, 33e can be folded outward in the circumferential direction.

[0049] In addition, the pants-type diaper 100 is configured so that the rigidity of the gather holding sheet 12 is set to be higher than the rigidity of the back sheet 11, for example, by making the basis weight of the fabric of the gather holding sheet 12 greater than the basis weight of the fabric of the back sheet 11, thereby making the rigidity of the gather holding sheet 12 higher than the rigidity of the back sheet 11.

[0050] The difference in basis weight between the gather pressing sheet 12 and the back sheet 11 is, for example, [12 g / m 2 However, the difference in basis weight is not limited to this numerical value.

[0051] Here, since the gather holding sheet 12 comes into contact with the wearer's skin at the lower part of the waist area where the leak-prevention sheet 13 is not provided, increasing the rigidity of the gather holding sheet 212 may decrease the comfort of the wearer's skin. Therefore, instead of increasing the rigidity of the entire gather holding sheet 12, the pants-type diaper 100 may have the rigidity higher than that of the back sheet 11 only in the parts corresponding to the both side parts 31b, 33b, 31c, 33c of the gather holding sheet 12.

[0052] The pants-type diaper 100 may also be configured such that a separate member having a higher rigidity than the backsheet 11 is provided overlapping the gather pressing sheet 12 only in the portions corresponding to the side portions 31b, 33b, 31c, and 33c.

[0053] In the pants-type diaper 100, the seal joints 34 may be formed continuously along the longitudinal direction L of both side portions 31b, 33b, 31c, 33c of the front portion 31 and the rear portion 33 as shown in FIG. 4. However, it is preferable that the seal joints 34 are formed in a dispersed manner so as to avoid the portions where the rubber thread 15 is arranged and only within the ranges F of each rectangular shape (the shape is not limited to a rectangular shape) shown by the dashed dotted lines in FIG. 10 where the rubber thread 15 is not arranged.

[0054] In this way, since the seal joint 34 is formed to avoid the rubber thread 15, the elastic force of the rubber thread 15 acting on the folded-back portions 31d, 33d, 31e, 33e is not interrupted by the seal joint 34, and the elastic force of the rubber thread 15 arranged in the width direction W over the entire length can be applied to the folded-back portions 31d, 33d, 31e, 33e.

[0055] As a result, in the pants-type diaper 100, the elastic force of the rubber thread 15 acting on the folded-back portions 31d, 33d, 31e, and 33e can be made stronger than when it is separated at the seal joint 34, and a decrease in the load that folds the folded-back portions 31d, 33d, 31e, and 33e toward the center in the width direction W can be prevented.

[0056] Furthermore, in the pants-type diaper 100, the elastic force of the rubber thread 15 in the folded-back portions 31d, 33d, 31e, and 33e is applied more strongly to the backsheet 11 than to the gather holding sheet 12, thereby making it easier to fold up the folded-back portions 31d, 33d, 31e, and 33e.

[0057] FIG. 12 is a cross-sectional view taken along a surface in the longitudinal direction L, showing a configuration in which the back sheet 11 and the gather pressing sheet 12 are joined with hot melt 16, and in each folded-back portion 31d, 33d, 31e, and 33e, the thread rubber 15 is joined to the back sheet 11 but not joined to the gather pressing sheet 12.

[0058] In this case, the pants-type diaper 100 may be configured such that, for example, as shown in FIG. 12, the back sheet 11 and the gather pressing sheet 12 are joined by hot melt 16, but in the folded-back portions 31d, 33d, 31e, and 33e, the thread rubber 15 is joined to the back sheet 11 by the hot melt 16 but is not joined to the gather pressing sheet 12.

[0059] In this way, when the pants-type diaper 100 is configured such that the rubber thread 15 is bonded only to the back sheet 11 and not to the gather pressing sheet 12, the hot melt 16 is applied to one side of the outer peripheral surface of the rubber thread 15. In this way, the pants-type diaper 100 is arranged such that the hot melt 16 is attached only to about half of the outer peripheral surface of the rubber thread 15, and the outer peripheral surface area to which the hot melt 16 is attached faces the back sheet 11 and the outer peripheral surface area to which the hot melt 16 is not attached faces the gather pressing sheet 12, with the rubber thread 15 sandwiched between the gather pressing sheet 12 and the back sheet 11.

[0060] FIG. 13 is a cross-sectional view corresponding to FIG. 8, showing a configuration in which the rubber thread 15 is not arranged in the range from the end edges 31h, 33h to predetermined positions 31j, 33j in the width direction W of the folded-back portions 31d, 33d, 31e, 33e.

[0061] Furthermore, in the pants-type diaper 100, it is preferable that the rubber thread 15 is not provided up to the edges 31h, 33h in the width direction W of the folded-back portions 31d (31e), 33d (33e), and that no rubber thread 15 is disposed in the range from the edges 31h, 33h of the folded-back portions 31d (31e), 33d (33e) to predetermined positions 31j, 33j in the width direction W, as shown in FIG. 13.

[0062] In the pants-type diaper 100 in which the elastic thread 15 is not arranged in the range from the edge 31h, 33h of the folded-back portion 31d, 33d, 31e, 33e to the predetermined position 31j, 33j in the width direction W, as shown by the two-dot chain line in FIG. 13, the elastic thread 15 is arranged in the range from the edge 31h, 33h of the folded-back portion 31d (31e), 33d (33e) folded back toward the center in the width direction W to the predetermined position 31j, 33j in the width direction W. Mu 15 It does not curve like the part in which it is placed, but maintains a planar (straight line in cross section) shape.

[0063] As a result, the angle at which the outer surface of the range from the end edges 31h, 33h of the folded-back portions 31d (31e), 33d (33e) to predetermined positions 31j, 33j in the width direction W intersects with the outer surface of the waist area (backsheet 11) to which the folded-back portions 31d (31e), 33d (33e) are folded back and brought into close proximity becomes shallow, thereby improving the sense of unity as a single surface.

[0064] The pants-type diaper 100 of this embodiment has folded-back portions 31d, 31e, 33d, and 33e formed in both the front portion 31 and the rear portion 33. However, the pants-type disposable diaper according to the present invention is not limited to having folded-back portions 31d, 31e, 33d, and 33e formed in both the front portion 31 and the rear portion 33, and may have folded-back portions 31d and 31e formed at least in the front portion 31 only. [Explanation of symbols]

[0065] 10 Exterior body 20 Interior body 31 Front part 33 Posterior part 31b, 31c, 33b, 33c Side 31d, 31e, 33d, 33e Folded part 34 Seal joint 100 Pants-type disposable diapers (pants-type diapers) L Longitudinal W Width direction

Claims

1. A pants-type disposable diaper in which a waist portion corresponding to the waist circumference of a wearer is formed by overlapping a widthwise side portion of one longitudinal portion with a widthwise side portion of the other longitudinal portion, and joining portions of the side portions along the longitudinal direction, The portions on the outer side of the joined portions in the width direction are not joined to each other, and each portion is folded back from the outer side of the waist portion toward the center in the width direction to form a folded-back portion, The folded-back portions are spaced apart from each other and cover the joined portions, respectively, of the pants-type disposable diaper.

2. The waist portion includes an elastic member disposed between a relatively inner sheet and a relatively outer sheet in a stretched state along the width direction, The outer sheet of the joined portion is formed with a relatively low rigidity compared to the inner sheet facing the joined portion, 2. The pants-type disposable diaper according to claim 1, wherein the folded-back portions are folded back from the outside toward the center in the width direction due to a difference in rigidity between the outer sheet and the inner sheet and the elastic force of the elastic member.

3. 3. The pants-type disposable diaper according to claim 2, wherein another member having a higher rigidity than said outer sheet is overlapped and joined to said side portion of said inner sheet.

4. 4. The pants-type disposable diaper according to claim 2, wherein the elastic members are not joined to the inner sheet but are joined to the outer sheet.

5. The pants-type disposable diaper according to claim 2 , wherein the elastic members are not disposed in a range from an edge of the folded-back portion in the width direction to a predetermined position.

Images