JP2016158815A - Disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable diaper whose peripheral edge of a waist opening does not stimulate the skin and which is improved so that the edge is hard to turn up.SOLUTION: A disposable diaper has a vertical direction and a horizontal direction X which cross each other in a worn state and includes: a front waist area 11; a rear waist area; a crotch area 13 positioned between the front and rear waist areas; a waist opening; a pair of leg openings; and an absorber 42 extending from the crotch area to the front waist area and the rear waist area. In at least one waist areas of the front and rear waist areas, a plurality of waist elastic bodies 24 horizontally extending in a stretched state between an upper end in the vertical direction of the absorber and a peripheral edge of the waist opening and reaching both side edge parts of the waist areas are arranged in parallel to form an elastic area 25. The waist elastic body includes a first waist elastic body 26a and a second waist elastic body 26b; the first waist elastic body has a stretching force weaker than the second waist elastic body.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a disposable diaper.

  Conventionally, a disposable diaper in which a plurality of elastic bodies extend in the stretched state in the waistline direction is known. For example, the pull-on type diaper disclosed in Patent Document 1 is an elastic body in which an extension force of an elastic body extending in the waistline direction along the periphery of the waist opening extends in the waistline direction between the waist opening and the leg opening. It is higher than the extension force.

  According to this diaper, it is possible to prevent the diaper being worn down from falling due to the high elongation force of the elastic body extending along the periphery of the waist opening.

JP2013-81869A

  In the diaper disclosed in Patent Document 1, when an infant wearing a diaper is in a sitting position and the abdomen is inflated forward, the contraction force of the elastic body acts locally and strongly on the abdomen. Then, skin troubles such as redness of the skin may occur.

  On the other hand, in a diaper in which the elastic body extending along the periphery of the waist opening has a low extension force, the periphery of the waist opening may be easily turned when the baby is in a sitting position.

  An object of the present invention is to provide an improved disposable diaper so that the periphery of the waist opening is not easily turned without stimulating the skin.

  The present invention has a vertical direction and a horizontal direction that intersect with each other in a worn state, a front waist region, a rear waist region, a crotch region located between the front and rear waist regions, a waist opening, and a pair of leg openings. And an absorbent body that extends from the crotch region to the front waist region and the rear waist region.

  The diaper according to the present invention extends in the laterally extended state between the upper end of the absorbent body in the vertical direction and the periphery of the waist opening in at least one waist region of the front and rear waist regions. A plurality of waist elastic bodies reaching both side edges of the region form an elastic region in parallel, and the waist elastic body includes a first waist elastic body and a second waist elastic body, and the first waist elastic body Has an extension force lower than the extension force of the second waist elastic body, and in the at least one waist region, the first waist elastic body is located at the top of the elastic region, and the first waist At least one second waist elastic body is positioned below the elastic body.

  In at least one waist region of the front and rear waist regions of the diaper according to the present invention, the first waist elastic body having an extension force lower than that of the second waist elastic body is located at the top of the elastic region, When wearing a diaper, the periphery of the waist opening can follow the skin without squeezing the skin. The second waist elastic body having a high extension force is positioned below the first waist elastic body to prevent the peripheral edge of the waist opening of the worn diaper from being turned up or down. Can be.

The drawings illustrate specific embodiments of the disposable diaper according to the present invention, including optional and preferred embodiments as well as essential configurations of the invention.
The front view of the disposable diaper of 1st Embodiment which concerns on this invention. The partial fracture top view of the extension diaper obtained by releasing the junction in the side seam part of the diaper of FIG. 1 and extending the diaper in a flat shape. The partial cutaway view of a front waist panel. The partial cutaway view of a back waist panel. The partial side view of the diaper which shows arrangement | positioning of a front waist elastic body, and arrangement | positioning of a back waist elastic body. The figure similar to FIG. 4 which shows another example of embodiment. The figure similar to FIG. 4 which shows another example of embodiment. The figure similar to FIG. 3 which shows another example of embodiment.

  Each of the following embodiments includes not only an indispensable configuration of the present invention but also a configuration that can be selectively employed, a configuration that can be combined, and a preferable configuration.

[First Embodiment]
In FIG. 1, the pull-on type disposable diaper 10 of 1st Embodiment exists in the state which the various elastic bodies mentioned later relaxed. The diaper 10 has a lateral direction X and a longitudinal direction Y that intersect each other, and the lateral direction X and the longitudinal direction Y are also the lateral direction and the vertical direction of the diaper 10 when in a worn state. The pull-on type disposable diaper 10 has a waist opening 15 and a pair of leg openings 16 as shown in the drawing, and after each leg of the wearer is passed through the leg opening 16, the peripheral edge 15a of the waist opening 15 is used as a waist. It means a disposable diaper 10 of the type that is worn up and is sometimes called a pants-type diaper.

  FIG. 2 shows a partial breakage of an extended diaper 10a obtained by unbonding the front waist panel 20 and the rear waist panel 30 at the side seam portion 14 in the diaper 10 shown in FIG. 1 and extending the diaper 10 in a planar shape. It is a top view. A double-headed arrow Y in FIG. 2 indicates that the direction indicated by the arrow is the vertical direction in the diaper 10 of FIG. The extended diaper 10a has a longitudinal center line P that divides the dimension in the transverse direction X into two equal parts and extends in the longitudinal direction Y, and a transverse center line Q that divides the dimension in the longitudinal direction Y into two parts and extends in the transverse direction X. However, it is formed symmetrically with respect to the longitudinal center line P. In addition, in this specification, when it says "it overlaps in the planar view of the diaper 10," it means that it exists in the overlapping relationship in the thickness direction of the extension diaper 10a.

  1 and 2, the diaper 10 includes a front waist panel 20, a rear waist panel 30, and a crotch panel 40, and each panel 20, 30, 40 is a skin facing surface and a clothing facing surface that is the opposite surface. And has a surface. The front waist panel 20 forms the front waist region 11, the rear waist panel 30 forms the rear waist region 12, and the crotch panel 40 forms the crotch region 13. The front waist panel 20 and the rear waist panel 30 in FIG. 1 are in a state where the skin facing surfaces of a front edge 20C and a rear edge 30C described later face each other, and are formed by ultrasonic processing or hot embossing. The side seam portion 14 is joined. In the crotch panel 40, the clothing facing surfaces at both ends in the longitudinal direction Y are joined to the skin facing surfaces of the front waist panel 20 and the rear waist panel 30 by a hot melt adhesive HA1 (see FIG. 2). The diaper 10 is formed with a waist opening 15 and a pair of leg openings 16.

  2, each of the front and rear waist panels 20 and 30 has lower end edges 20A and 30A extending in the horizontal direction X, and upper end edges 20B and 30B facing the lower end edges 20A and 30A in the vertical direction Y. A pair of front edge portions 20C and a pair of rear edge portions 30C extend between the lower edge 20A and the upper edge 20B and between the lower edge 30A and the upper edge 30B (see FIG. 1). See also).

  The front waist panel 20 includes an inner sheet 21a forming a skin facing surface and an outer sheet 21b forming a clothing facing surface. A plurality of thread-like or belt-like front waist elastic bodies 24 extending in the lateral direction X between these sheets 21a and 21b are attached to the inner sheet 21a and / or the outer sheet 21b so as to be contractible in an extended state. The front waist elastic body 24 is positioned between the upper end edge 42A of the crotch panel 40 in the longitudinal direction Y of the post-absorbent body 42 and the peripheral edge 15a of the waist opening 15, and the front edge 20C of the front waist panel 20 is provided. Extend to reach each of the. The front waist panel 20 is formed with a front waist elastic region 25 that can be elastically expanded and contracted in the lateral direction X by the front waist elastic body 24. In the diaper 10 of FIG. 1, a large number of gathers 25 a are formed in the front waist elastic region 25.

  FIG. 3 is a partially cutaway view of the front waist panel 20. The front waist panel 20 includes, in addition to the front waist elastic region 25, a front side auxiliary elastic region 27 formed by a plurality of auxiliary elastic bodies 24C between the lower end edge 20A of the front waist panel 20 and the front waist elastic region 25. Including.

  The front waist elastic region 25 extends in the lateral direction X along the peripheral edge 15 a of the waist opening 15. The front auxiliary elastic region 27 extends in the lateral direction X in parallel with the front waist elastic region 25. A front inelastic region 29 that does not include an elastic body is formed below the front auxiliary elastic region 27 as necessary. The front waist elastic region 25 is located above the upper end edge 42A of the body fluid-absorbing absorber 42 included in the crotch panel 40, more preferably above the upper end edge 40A of the crotch panel 40. It can be expanded and contracted with almost no influence of 40.

  As shown in FIG. 3, the front waist elastic body 24 includes a first waist elastic body 26a and a second waist elastic body 26b. In the drawing, in order to easily distinguish the first waist elastic body 26a and the second waist elastic body 26b, the first waist elastic body 26a is indicated by a thin line, and the second waist elastic body 26b is indicated by a thick line. is there. The first waist elastic body 26a has an extension force lower than that of the second waist elastic body 26b. For example, the first waist elastic body 26a extends a spandex having a fineness of 200-470 dtex by 2.2-3.0 times. Can be obtained by: The 2nd waist elastic body 26b can be obtained by extending | stretching the spandex whose fineness is 470-780 dtex 2.2-3.0 times, for example. In the diaper 10, when making the expansion | extension magnification of the 1st waist elastic body 26a and the 2nd waist elastic body 26b the same, the 1st waist elastic body 26a whose fineness is smaller than the 2nd waist elastic body 26b is used. When making the fineness of the 1st waist elastic body 26a and the 2nd waist elastic body 26b the same, the 1st waist elastic body 26a whose expansion ratio is smaller than the 2nd waist elastic body 26b is used. In a specific example of the diaper 10, the first waist elastic body 26 a is used by extending a spandex having a fineness of 310 dtex to 2.6 times. The second waist elastic body 26b is used by extending spandex having a fineness of 620 dtex to 2.6 times. The second waist elastic body 26b having a high extension force has a contraction force higher than that of the first waist elastic body 26a.

  In the front waist elastic region 25, the 1st waist elastic body 26a is arrange | positioned at least on the uppermost part. In the example of FIG. 3, the first waist elastic body 26a is arranged so as to be adjacent to the first waist elastic body 26a from below, that is, as the second elastic body from the top. As the third elastic body from the top, the second waist elastic body 26b is disposed adjacent to the first waist elastic body 26a. As the 4-6th elastic body from above, the 3rd first waist elastic body 26a is arranged in parallel. The second waist elastic body 26b is disposed as the seventh elastic body from the top. In the longitudinal direction Y, the spacing between adjacent front waist elastic bodies 24 is in the range of 2.0 to 5.0 mm.

  As described above, in the front waist elastic region 25 of the front waist panel 20 in which the first and second waist elastic bodies 26a and 26b are disposed, the second waist elastic bodies 26b are disposed adjacent to each other. Absent.

  The front waist panel 20 also does not include the first and second waist elastic bodies 26a and 26b within the range from the upper end edge 20B to the lower 2-10 mm, more preferably 2-5 mm. In other words, the first and second waist elastic bodies 26 a and 26 b are not positioned on the upper end edge 20 </ b> B of the front waist panel 20.

  For the auxiliary elastic body 24C in the front auxiliary elastic region 27, for example, a spandex of 310-940 dtex can be used in a state of being expanded 1.5 to 2.8 times. The spacing dimension between the auxiliary elastic bodies 24C adjacent to each other is in the range of 5 to 20 mm.

  Referring to FIG. 4, the rear waist panel 30 includes an inner sheet 31a that forms a skin facing surface and an outer sheet 31b that forms a clothing facing surface. Between the inner surface sheet 31a and the outer surface sheet 31b, a plurality of thread-like or strip-like rear waist elastic bodies 34 and a plurality of first auxiliary elastic bodies 34B extending in the transverse direction X are interposed in an expanded state. It is attached to at least one of the sheet 31a and the outer sheet 31b so as to be shrinkable by using a hot melt adhesive (not shown).

  The rear waist elastic body 34 forms a rear waist elastic region 35 extending between the side edge portions 30 </ b> C along the upper edge 30 </ b> B of the rear waist panel 30 which is the peripheral edge 15 a of the waist opening 15. In the rear waist panel 30, the plurality of first auxiliary elastic bodies 34 </ b> B extending in the lateral direction X below the rear waist panel 30 do not cross the absorber 42, and the rear waist panel 30 It is located between the side edges 30C.

  The plurality of first auxiliary elastic bodies 34 </ b> B form a pair of first auxiliary elastic areas 37 that are spaced apart from each other in the lateral direction X via the absorber 42, and the first auxiliary elastic areas 37 are not connected to each other. An elastic region 39 is formed. In FIG. 4, the rear waist elastic region 35 and the first auxiliary elastic region 37 are formed so as not to substantially overlap the absorber 42.

  The rear waist elastic body 34 is between the upper end edge 42B located in the longitudinal direction Y of the absorber 42 and the peripheral edge 15a of the waist opening 15, more preferably between the upper end edge 40B and the peripheral edge 15a of the crotch panel 40, The rear waist panel 30 extends so as to reach the rear edge 30C. The rear waist elastic body 34 includes a first waist elastic body 36a and a second waist elastic body 36b. The first waist elastic body 36a has an extension force lower than that of the second waist elastic body 36b. For example, the first waist elastic body 36a extends a spandex having a fineness of 200-470 dtex to 2.2-3.0 times. Can be obtained by: The 2nd waist elastic body 36b can be obtained by extending | stretching the spandex whose fineness is 470-620 dtex to 2.2-3.0 times, for example. When making the expansion | extension magnification of the 1st waist elastic body 36a and the 2nd waist elastic body 36b the same, the 1st waist elastic body 36a whose fineness is smaller than the 2nd waist elastic body 36b is used. When making the fineness of the 1st waist elastic body 36a and the 2nd waist elastic body 36b the same, the 1st waist elastic body 36a whose expansion ratio is smaller than the 2nd waist elastic body 36b is used. In a specific example of the diaper 10, the first waist elastic body 36 a is a spandex having a fineness of 310 dtex that is extended to 2.6 times, and the second waist elastic body 36 b is a spandex having a fineness of 620 dtex. Use one that has been stretched up to 6 times. The second waist elastic body 36b has an extension force and a contraction force higher than those of the first waist elastic body 36a.

  In the rear waist elastic region 35, at least one first waist elastic body 36a is disposed at the top. In the illustrated example, a total of seven first waist elastic bodies 36 a including the uppermost first waist elastic body 36 a are arranged in parallel. The seventh waist elastic body 36b from the bottom is adjacent to the seventh waist elastic body 36a from the top. The first waist elastic body 36a is adjacent to the second waist elastic body 36b from below. The first waist elastic body 36a is adjacent to a second waist elastic body 36b from below. The first waist elastic body 36a is adjacent to the second waist elastic body 36b from below. The separation dimension between the rear waist elastic bodies 34 is in the range of 2.0 to 5.0 mm. The rear waist panel 30 in the illustrated example is larger than the distance between the front waist elastic bodies 24 in the front waist panel 20.

  In the rear waist elastic region 35 of the rear waist panel 30 thus formed, the second waist elastic bodies 36b are not adjacent to each other.

  The rear waist panel 30 also does not include the first and second waist elastic bodies 36a and 36b within the range from the upper edge 30B to the lower 2-10 mm, more preferably 2-5 mm. In other words, the first and second waist elastic bodies 36 a and 36 b are not positioned on the upper edge 30 </ b> B of the rear waist panel 30.

  For the first auxiliary elastic body 34B, for example, spandex having a fineness of 310 to 940 dtex can be extended by 2.8 to 3.8 times.

  The distance between the first auxiliary elastic bodies 34B is in the range of 2.5-5 mm.

<Crotch panel>
Referring to FIG. 2, the crotch panel 40 has one upper edge 40A, the other upper edge 40B, and both side edges 40C located between both upper edges 40A, 40B. The crotch panel 40 is a liquid-impervious liner 41 made of nonwoven fabric that forms part of the skin-facing surface of the diaper 10, an absorbent body 42, and a liquid-impermeable material that covers the absorbent body 42 from the side of the clothing-facing surface. And a non-woven cover sheet 44 (see FIG. 1) that covers the leak-proof sheet and forms a clothing-facing surface of the crotch panel 40.

  The absorber 42 has one upper end edge 42A, the other upper end edge 42B, and both side edge portions 42C connected to both the upper end edges 42A and 42B. The absorbent body 42 is a liquid diffusible liquid permeable liquid formed from a body fluid absorbent core 42D formed from a mixture of fluff pulp and superabsorbent polymer particles, and tissue paper encapsulating the core 42D. And a core wrap sheet 42E.

  The covering sheet 44 has both side portions 45 extending in the lateral direction X from each of the side edge portions 42C of the absorbent body 42, and each of the both side portions 45 has a longitudinal center line in a folding line 61 parallel to the longitudinal center line P. Folded toward P. The overlapping side portions 45 are joined to the front and rear waist panels 20 and 30 by the hot melt adhesive HA1 at the portions overlapping the front waist panel 20 and the rear waist panel 30, respectively. The folded side portions 45 are joined by the hot melt adhesive HA2 at the front and rear end portions 50a and 50b. The folded side portions 45 are also joined together by a hot melt adhesive HA3 to form a leg periphery flap portion 51. A plurality of leg elastic bodies 49 are attached to the leg flap portion 51 in an extended state. The folded side portions 45 are also in a non-joined state at a portion inside the leg periphery flap portion 51 to form a leak-proof cuff portion 52. A sleeve 52b extending in parallel with the longitudinal center line P is formed at the edge 52a of the leak-proof cuff 52, and an elastic body 48 is attached in an expanded state inside the sleeve 52b. In the crotch panel 40 of the diaper 10 in a worn state, the leg-hole elastic body 49 extends and contracts, so that the leg-hole flap portion 51 elastically fits around the leg of the diaper wearer (not shown). Further, when the elastic body 48 contracts, the edge portion 52a of the leak-proof cuff portion 52 that has been laid down so as to face the absorber 42 in FIG. 2 approaches or contacts the buttocks and legs of the diaper wearer. Stand up like so.

  According to the diaper 10 made in this way, in the front and rear waist regions 11 and 12, a low extension force is provided at the uppermost portions of the front waist elastic region 25 and the rear waist elastic region 35 extending along the peripheral edge 15 a of the waist opening 15. With the first waist elastic bodies 26a, 36a having the position, the peripheral edge 15a of the waist opening 15 and the portion along the waist opening 15 can be placed along the skin without being tightened. Will be good. Further, even when the diaper wearer is in the sitting position or in the sitting position and leans forward, the peripheral edge 15a of the waist opening 15 and the portion along the waist opening 15 are not easily turned up. Underneath the first waist elastic bodies 26a, 36a, there is only one second waist elastic body 26b, 36b having a high extension force, and the portion along the peripheral edge 15a of the waist opening 15 is supported from below. Without causing strong tightening to the abdomen that is experienced when a plurality of high-strength elastic members are juxtaposed, turning over of the portion along the peripheral edge 15a can be prevented. At the same time, the diaper 10 can be prevented from sliding down. Thus, in the front waist elastic region 25 and the rear waist elastic region 35, the elastic bodies adjacent to the second waist elastic bodies 26b and 36b having a high extension force are the first waist elastic bodies 26a and 36a having a low extension force. Since the second waist elastic bodies 26b and / or the second waist elastic bodies 36b are not adjacent to each other, the second waist elastic bodies 26b and / or the second waist elastic bodies 36b are arranged around the waist of the wearer. On the other hand, it is possible to prevent a strong pressure contact force from acting intensively over a wide range in the vertical direction and to prevent the occurrence of skin troubles.

  Furthermore, the mother when the infant wears a pull-on type diaper as shown in the example first expands the waist opening by extending the waist elastic body used along the periphery of the waist opening, and the opening Let the leg insert. At this time, in the diaper 10 according to the present invention, the first waist elastic bodies 26a and 36a located at the uppermost portions of the front waist elastic region 25 and the rear waist elastic region 35 are easily extended, and the waist opening 15 is The mouth is greatly opened, but the second waist elastic bodies 26b and 36b do not extend so much. As a result, the state that the waist opening 15 opens becomes a funnel shape whose diameter decreases as it goes downward from the peripheral edge 15a. The opening 15 having such a behavior has an advantage that the mother can easily insert the leg without trouble.

  When the diaper 10 is in a contracted state, that is, when the elastic body in the diaper 10 is in a relaxed state, each of the second waist elastic bodies 26b and 36b is stretched higher than each of the first waist elastic bodies 26a and 36a. Have power. Each of such second waist elastic bodies 26b and 36b is used in a state where the expansion ratio is higher than that of the first waist elastic bodies 26a and 36a when the fineness is the same as that of each of the first waist elastic bodies 26a and 36a. To do. Each of the second waist elastic bodies 26b and 36b has a higher fineness than the first waist elastic bodies 26a and 36a when the expansion magnification is the same as that of each of the first waist elastic bodies 26a and 36a. The

  FIG. 5 is a partial side view of the diaper 10 when the front waist elastic body 24 and the rear waist elastic body 34 are in an extended state, and a part of the front waist panel 20 positioned in front of the side seam portion 14; A part of the rear waist panel 30 located behind the side seam portion 14 is shown. As shown in FIG. 5, in the longitudinal direction Y, each of the front waist elastic body 24 and each of the rear waist elastic body 34 is arranged so as not to be connected linearly via the side seam portion 14. Yes. In such a diaper 10, the elastic bodies of the front and rear waist regions 11 and 12 do not tighten the abdomen as a continuous line. However, although not shown, a part of the plurality of front waist elastic bodies 24 and a part or all of the rear waist elastic bodies 34 are interposed via the side seam portion 14. The present invention can also be implemented in a connected manner. In such an aspect, with the shrinkage force in the waist direction of the front and rear waist elastic bodies 24 and 34 in the front and rear waist regions 11 and 12, a large number of fine gathers formed on the outer sheet 21b and 31b make a round around the waist. It will be neatly arranged.

  In the front waist panel 20 of FIG. 5, in the front waist elastic region 25, the 2nd waist elastic body 26b is located in the lowest part, and is facing the core 42D. The second waist elastic body 26b having a high extension force used in this way has the upper end edge 42A (see FIG. 2) of the absorbent body 42 protruding forward of the abdomen when the diaper wearer is in a sitting position. Therefore, the appearance of the diaper 10 when worn can be improved. In the present invention, when the second waist elastic body 26b and / or the second waist elastic body 36b is located at the lowermost part of the front waist elastic region 25 and / or the rear waist elastic region 35, The extension force of the second waist elastic body 26a and / or the second waist elastic body 36b is set higher than the extension force of any of the front waist elastic body 24 and / or the rear waist elastic body 34 positioned above the second waist elastic body 26b. be able to.

  Furthermore, in the front waist panel 20 in the diaper 10, the two second waist elastic bodies 26b having a high extension force are arranged in the longitudinal direction Y in such a manner that the first waist elastic body 26a having a low extension force is interposed therebetween. ing. Also in the rear waist panel 30, the 2nd waist elastic body 36b with a high extension force is arrange | positioned in the vertical direction Y in the aspect in which the 1st waist elastic body 36a with a low extension force interposes among them. Therefore, the diaper 10 can be fitted to the wearer's skin in the longitudinal direction Y without strongly tightening a wide range of the front and rear waist regions.

  In the present invention, the extension force of the first waist elastic body 36a in the rear waist panel 30 may be higher or lower than the extension force of the first waist elastic body 26a of the front waist panel 20, It may be the same. When the extension force of the first waist elastic body 36a in the rear waist panel 30 is larger than the extension force of the first waist elastic body 26a in the front waist panel 20, the rear waist panel 30 is brought into close contact with the buttocks of the wearer. Is easy.

  Furthermore, in the present invention, the extension force of the second waist elastic body 26b in the front waist panel 20 and the extension force of the second waist elastic body 36b in the rear waist waist panel 30 are also the same as those of the first waist elastic bodies 26a and 36a. It can be adjusted in the same way as the case.

  In the present invention, the first and second waist elastic bodies 26a and 26b in the front waist panel 20 and the first and second waist elastic bodies 36a and 36b in the rear waist panel 30 are arranged as shown in the illustrated example. For each of the second waist elastic bodies 26b and 36b, the first waist elastic bodies 26a and 36a located on the side of the waist opening 15 and the leg openings 16 with respect to the second waist elastic bodies 26b and 36b. The first waist elastic bodies 26a and 36a located on the side of the first side can be adjacent to each other. In the front waist panel 20 and the rear waist panel 30, the number of the first waist elastic bodies 26a, 36a disposed on the side of the waist opening 15 and the leg opening 16 with respect to the second waist elastic bodies 26b, 36b is as follows. Although it may be singular or plural, the front waist panel 20 and the rear waist panel 30 are arranged along the wearer's skin over a wide range above and below the second waist elastic bodies 26b, 36b. It is preferable to make the appearance of the worn diaper 10 slim by making the front waist region 11 and the rear waist region 12 slack.

[Second Embodiment]
FIG. 6 is a partially cutaway view of the rear waist panel 30 in the extended diaper 10a showing the second embodiment, and a part of the crotch panel 40 is indicated by an imaginary line. In the illustrated rear waist panel 30, one second waist elastic body 36 b is at the lowermost portion of the rear waist elastic region 35 and is adjacent to the upper end edge 42 </ b> B of the absorber 42. The first waist elastic body 36a is adjacent to the second waist elastic body 36b from above. The distance between the second waist elastic body 36b and the upper end edge 42B of the absorbent body 42 is preferably in the range of 2-15 mm. At this time, the second waist elastic body 36b wears the upper end edge 42B of the absorbent body 42. Acts to contact the person's skin. Although not shown, the second waist elastic body 26b in the front waist panel 20 is arranged so as to be adjacent to the upper end edge 42A of the absorber 42, and the same effect as the second waist elastic body 36b can be obtained. it can.

[Third Embodiment]
FIG. 7 is a drawing showing the skin facing surfaces of the rear waist panel 30 and the crotch panel 40 in the extended diaper 10a showing the third embodiment.

  Referring to FIG. 7, in the rear waist panel 30, an elastic sheet that is formed of a nonwoven fabric containing elastic fibers such as urethane elastic yarn on the skin facing surface of the inner surface sheet 31 a and elastically expands and contracts in the lateral direction X. The member 22a is attached in an extended state. The elastic sheet member 22a extends to both side seam portions 14 so as to overlap at least a part of the rear waist elastic region 35, and the inner surface is formed by a hot melt adhesive HA4 applied in an appropriate pattern such as a dot shape or a spiral shape. It is attached to the sheet 31a. The elastic sheet member 22a is a smooth surface in a state where at least a portion of the rear waist panel 30 along the peripheral edge 15a of the waist opening 15 does not cause gathers, or hardly gathers. As a result, it is possible to contact the wearer's skin. Moreover, as a result, it can prevent that excrement, such as a bodily fluid, leaks to the back side from the clearance gap which arises between the back waist panel 30 and a wearer's skin. In the present invention, the elastic sheet member 22a can also be attached to the front waist panel 20 in the same manner as in FIG.

  FIG. 8 is a view similar to FIG. 3 showing the fourth embodiment. However, a sheet member 22b that extends in the lateral direction X along the lower edge 20A of the front waist panel 20 and crosses the crotch panel 40 is attached to the skin facing surface of the front waist panel 20 in FIG. The sheet member 22b is formed of an elastic nonwoven fabric that elastically expands and contracts in the lateral direction X. The sheet member 22b is in a state of being stretched in the lateral direction X, and both end portions 53 are joined to the inner sheet 21a via the hot melt adhesive HA5. The central portion 56 in the lateral direction X of the sheet member 22 b is not joined to the crotch panel 40. Both end portions 53 of the sheet member 22 b are joined to the crotch panel 40 in a state where the both end portions 53 overlap the end portions of the leg-hole elastic bodies 49. Such a sheet | seat member 22b makes the inner surface of the diaper 10 which opposes skin smooth, and enables the inner surface to contact | abut to skin in a wide range. Further, since the movement of the edge portion 52a can be restricted so that the edge portion 52a of the leak-proof cuff portion 52 stands at a portion lower than the lower end edge 20A of the front waist panel 20, the edge portion 52a is restricted to the front waist. It is possible to prevent the front waist panel 20 from acting so as to stand up at a portion overlapping the panel 20 and to be separated from the skin. Moreover, since the edge part 52a comes to stand up below the sheet | seat member 22b, the effect | action which tries to slide down the upper part of the front waist panel 20 becomes weak, and the front waist area 11 becomes difficult to shift | deviate below. Further, in the front waist region 11, the seat member 22 b is positioned below, the elastic region 25 is positioned above, and the both do not overlap in plan view, so that the contraction force of the elastic bodies 48 and 49 acts on the elastic region 25. Can be suppressed.

  In the present invention, the inner sheet 21a and outer sheet 21b in the front waist panel 20 and / or the inner sheet 31a and outer sheet 31b in the rear waist panel 30 can be joined with a hot melt adhesive (not shown). Alternatively, they can be joined by embossing, preferably embossing under heating. If a pattern such as a quilt pattern is drawn on the outer sheet 21b and / or the outer sheet 31b by embossing, the shapes and distributions of many gathers generated when the front waist panel 20 and the rear waist panel 30 contract in the lateral direction X The diaper 10 can be made to have a good appearance, and the front waist panel 20 and the rear waist panel 30 can be made elastic in the thickness direction.

  The present invention described taking the pull-on type diaper 10 as an example can also be implemented in an open type diaper.

  Further, the present invention is implemented by the pull-on type diaper 10 having the front waist panel 20, the rear waist panel 30, and the crotch panel 40, and the front and rear waist areas and the crotch area are integrally formed, It can also be implemented with a pull-on type diaper that becomes an hourglass shape when deployed in a shape.

  In addition to the materials described in the present specification, materials that are commonly used in the technical field can be used without limitation for the respective components constituting the diaper 10, and the specification and patents of the present invention can be used. In the claims, the terms “first” and “second” are used merely to distinguish similar elements, positions relative to each other, and the like.

The disclosure relating to the present invention described above can be summarized at least as follows.
The crotch area which has the up-and-down direction and the horizontal direction which cross mutually in the wearing state, is located between the front waist area, the back waist area, the front-and-rear waist area, the waist opening, the pair of leg openings, and the crotch In a disposable diaper including an absorbent body extending from a region to the front waist region and the rear waist region, in at least one waist region of the front and rear waist regions, an upper portion in the longitudinal direction of the absorber and the waist opening A plurality of waist elastic bodies extending in the lateral direction in between and reaching both side edges of the waist area form an elastic area in parallel, and the waist elastic body includes a first waist elastic body and a first waist elastic body. Two waist elastic bodies, and the first waist elastic body has an extension force lower than the extension force of the second waist elastic body, and the at least In one waist region, the first waist elastic body is located at the top of the elastic region, and at least one second waist elastic body is located below the first waist elastic body. .

The present invention can include at least the following embodiments.
(1) The waist elastic body includes a plurality of first waist elastic bodies and at least one second waist elastic body.
(2) The second waist elastic body is located at the lowermost part of the elastic region.
(3) The spacing dimension between the waist elastic bodies adjacent in the longitudinal direction is in the range of 2.0 to 5.0 mm.
(4) The front waist region and the rear waist region are formed by joining the side edge portions positioned in the lateral direction to each other to form the waist opening, and the waist elastic body is provided in each of the front and rear waist regions. Are included, and at least partially overlap at the side edges joined to each other.
(5) The arrangement | positioning of the said waist elastic body in the said front waist area and the said back waist area is the same.
(6) The fineness of the first waist elastic body is in the range of 200-470 dtex, and the fineness of the second waist elastic body is in the range of 470-780 dtex.
(7) The said waist elastic body is not arrange | positioned at the edge region in which the dimension in the said longitudinal direction exists in the range whose said longitudinal direction is 5 mm.
(8) At least one of the first waist elastic body and the second waist elastic body in the rear waist region has an extension force higher than that of at least one elastic body in the front waist region. is there.
(9) On at least one skin-facing surface side of the front and rear waist region, a nonwoven fabric elastically stretchable in the lateral direction is disposed in one of the stretched state and the non-stretched state.
(10) The clothing facing surface in at least one waist region of the front and rear waist regions is formed of a nonwoven fabric of thermoplastic synthetic resin, and the embossed portions spaced apart from each other are formed in the nonwoven fabric.
(11) The crotch region has a cuff that extends in the longitudinal direction and elastically expands and contracts in the longitudinal direction on the outer side in the lateral direction of the absorber.

DESCRIPTION OF SYMBOLS 10 Disposable diaper 11 Front waist area 12 Rear waist area 13 Crotch area 15 Waist opening 15a Periphery 16 Leg opening 20A Lower edge 20B Upper edge 20C Front edge (both edges)
22b Seat member 24 Front waist elastic body 25 Elastic region 26a First waist elastic body 26b Second waist elastic body 26c Elastic region 30A Lower end edge 30B Upper end edge 30C Rear side edge (both side edges)
35 elastic region 34 rear waist elastic body 36a first waist elastic body 36b second waist elastic body 42A upper end edge 42B upper end edge 52 leak-proof cuff (cuff)
X Horizontal direction Y Vertical direction

Claims (12)

The crotch area which has the up-and-down direction and the horizontal direction which cross mutually in the wearing state, is located between the front waist area, the back waist area, the front-and-rear waist area, the waist opening, the pair of leg openings, and the crotch In a disposable diaper including an absorbent body extending from a region to the front waist region and the rear waist region,
In at least one waist region of the front and rear waist regions, it extends in the lateral direction between the upper end of the absorber in the vertical direction and the periphery of the waist opening and reaches both side edges of the waist region. A plurality of waist elastic bodies form an elastic region in parallel,
The waist elastic body includes a first waist elastic body and a second waist elastic body, and the first waist elastic body has an extension force lower than an extension force of the second waist elastic body,
In the at least one waist region, the first waist elastic body is located at the uppermost part of the elastic region, and at least one second waist elastic body is located below the first waist elastic body. Said diaper.   The diaper according to claim 1, wherein the waist elastic body includes a plurality of first waist elastic bodies and at least one second waist elastic body.   The diaper according to claim 1 or 2, wherein the second waist elastic body is located at a lowermost portion of the elastic region.   The diaper according to any one of claims 1 to 3, wherein a spacing dimension between the waist elastic bodies adjacent in the vertical direction is in a range of 2.0 to 5.0 mm. The front waist region and the rear waist region are formed by joining the side edges located in the lateral direction to each other to form the waist opening,
5. The waist elastic body according to claim 1, wherein a plurality of the waist elastic bodies are arranged in each of the front and rear waist regions, and the waist elastic bodies include at least partially overlapping at the side edge portions joined to each other. Diapers.   The diaper according to claim 1, wherein the waist elastic bodies are arranged in the front waist region and the rear waist region in the same manner. The fineness of the first waist elastic body is in the range of 200-470 dtex,
The diaper according to any one of claims 1 to 6, wherein a fineness of the second waist elastic body is in a range of 470-780 dtex.   The diaper according to any one of claims 1 to 7, wherein the waist elastic body is not disposed in an edge region where the dimension in the vertical direction is within a range of 5 mm.   The at least one of the first waist elastic body and the second waist elastic body in the rear waist region has an extension force higher than that of at least one elastic body in the front waist region. The diaper in any one of 1-8.   The nonwoven fabric that can be elastically stretched in the lateral direction is disposed on at least one skin-facing surface side of the front and rear waist regions, either in the stretched state or in the non-stretched state. Diapers described in.   The clothing facing surface in at least one waist region of the front and rear waist regions is formed of a nonwoven fabric of thermoplastic synthetic resin, and the nonwoven fabric is formed with a number of embossed portions spaced apart from each other. The diaper described in any of the above.   The diaper according to any one of claims 1 to 11, wherein the crotch region has a cuff that extends in the up-down direction and elastically expands and contracts in the up-down direction outside the lateral direction of the absorber.

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