JP6132638B2 - Pants-type wearing article - Google Patents

Description

  The present invention relates to a pants-type wearing article such as a disposable pants-type diaper and an incontinence diaper cover.

  Conventionally, disposable pants-type wearing articles are well known, and Patent Document 1 discloses a pants-type absorbent article in which a pair of side seal portions, a waistline opening, and a pair of leghole openings are formed. A region between an upper virtual line connecting the upper ends of the uppermost elastic members in each of the side seal portions and a lower virtual line connecting the lower ends of the lowermost elastic members of each of the pair of side seal portions Are divided into four belt-like regions having the same width extending in the absorbent article width direction, and the four belt-like regions are sequentially arranged from the upper virtual straight line side toward the lower virtual straight line side, the first region, the second region, When it is set as the 3rd field and the 4th field, each field contraction force at the time of wearing of an absorptive article has the 2nd field larger than the 3rd field, the 4th field is larger than the 3rd field, and the 2nd field is Larger than the first region, The contraction force in the fourth region is greater than or substantially equal to that of the second region, and the second region and the fourth region are regions that are in contact with a portion where the wearer's bone protrudes close to the body surface. An absorbent article is disclosed.

Japanese Patent No. 5144229

  According to the absorbent article disclosed in Patent Document 1, the weight due to excretion of the wearer is supported by setting the contraction force of the stable region (the second and fourth regions) where the bone protrudes to the body surface to be high. This makes it possible to form a fulcrum of the absorbent article, which makes it difficult for the absorbent article to slip off.

  However, in the absorbent article of Patent Document 1, since the stress in the second region is higher than that in the first region, the second region, which is a place where the finger is put when the vicinity of the waist of the worn article is gripped and pulled up, is most contracted. Furthermore, since the contraction of the first region located above the second region is small, a place where the finger is caught is not formed, and it is difficult to grasp. In particular, in the case of an elderly person with weak gripping force, the finger may slip and come off even if the first region is grasped.

  An object of the present invention is an improvement of a conventional pant-type wearing article, in which a place for catching a finger on the wearing article is formed, and when an elderly person wears the wearing article, the pant-type wearing article can be easily pulled up. On offer.

  The present invention comprises a front waistline region, a rear waistline region, and a crotch region, a liquid absorbing structure that extends from the front waistline region through the crotch region to the rear waistline region, and a waistline opening formed by an upper end edge of the front and back waistline region. The present invention also relates to a disposable pants-type wearing article having a pair of leg-hole openings located on both sides of the crotch region and having a waist elastic region in which the front-rear waist region can be elastically extended in the waist direction.

In the worn article according to the present invention, a first elastic region, a second elastic region, and a third elastic region are arranged in the waist elastic region in order from the waist opening to the leg opening, and the first elastic region The third elastic region extends between the second elastic region and the leg opening, and the contraction rate of the second elastic region in the waist direction is determined by the first and third elasticities. When the shrinkage rate of the region is smaller and the first to third elastic regions are in an elastically relaxed state, the second elastic region is curved toward the outside of the wearing article , and the second elastic region is the front waistline region The front second elastic region and the rear second elastic region disposed in the rear waistline region, the separation dimension from the lower end of the front second elastic region to the upper edge of the front waistline region is the rear first 2 Larger than the distance from the lower end of the elastic region to the upper end edge of the rear waistline region .

  In the pant-type wearing article according to the present invention, when the first to third elastic regions are in an elastically relaxed state, the second elastic region whose contraction force is smaller than the first and third elastic regions is the outer side of the wearing article. Therefore, when an elderly person wears a wearing article, the curved second elastic region can be grasped with a finger and easily pulled up. In addition, when a finger is inserted inside the worn article to pull up the worn article, the finger can easily enter the pocket portion on the back side of the curved portion of the second elastic region, and once the finger enters the pocket portion. Since the finger does not slip off, the worn article can be pulled up easily.

The perspective view of the underpants type diaper which concerns on 1st embodiment of an underpants type wearing article. The partially broken expansion | deployment top view of a diaper. The disassembled perspective view of the diaper shown in FIG. FIG. 4 is a schematic cross-sectional view taken along line IV-IV in FIG. 2. The schematic diagram showing the external appearance when a diaper is loosened elastically. The partially broken expansion | deployment top view of the underpants type diaper which concerns on 2nd embodiment. The disassembled perspective view of the diaper shown in FIG. VIII-VIII line cross-sectional schematic diagram of FIG.

<First Embodiment>
1 to 3, a disposable pant-type diaper 10 according to a first embodiment of a pant-type wearing article according to the present invention includes a front waistline region 11, a back waistline region 12, and a crotch region 13, and includes a front and back waistline. It has a waistline opening 16 formed by upper end edges 17 and 18 of the regions 11 and 12, and a pair of leg periphery openings 21 located on both sides of the crotch region 13, and the front and rear waistline regions 11 and 12 are in the waistline direction. A waist elastic region 40 that is elastically extensible is provided. The waist elastic region 40 includes a first elastic region 41, a second elastic region 42, and a third elastic region 43 in order along the direction from the upper end edges 17, 18 of the front and rear waist regions 11, 12 toward the leg opening 21. Is arranged. The contraction rate of the second elastic region 42 is smaller than that of the first and third elastic regions 41, 43, and the first to third elastic regions 41, 42, 43 are in an elastically relaxed state as will be described later. When the second elastic region 42 curves toward the outside of the wearing article.

  FIG. 2 is a diagram illustrating the front waistline region 11 and the back waistline region 12 of the diaper 10 which are separated and developed on a plane and partially broken. 3 is an exploded perspective view of the diaper 10 developed in a plane, and FIG. 4 is a schematic cross-sectional view taken along the line IV-IV in FIG. 2 and the like shown in FIG. 2 and the like of the present application represent the waistline direction of the diaper 10 and directions corresponding to the direction perpendicular to the waistline direction.

  2 and 3, the diaper 10 includes a front waistline region 11, a rear waistline region 12, and a crotch region 13 located between the front waistline region 11 and the back waistline region 12. And a non-skin facing surface on the opposite side. The diaper 10 includes a chassis 14 that forms the base form of the diaper 10, and a liquid absorbing structure 15 that is provided on the skin facing surface of the chassis 14 and extends in the longitudinal direction Y with the crotch region 13 as a center. The front end edge 15a and the rear end edge 15b of the liquid absorbing structure 15 extend to the front waistline region 11 and the rear waistline region 12, respectively.

The chassis 14 of the diaper 10 includes an upper end edge 17 of the front waistline region 11 and an upper end edge 18 of the rear waistline region 12 that extend parallel to each other in the lateral direction X, and both side edges 19 of the diaper 10 that extend away from each other in the longitudinal direction Y. 20. Both side edges 19 and 20 are concavely curved toward the liquid absorbing structure 15 in the crotch region 13, and the front waistline region at the center of the crotch region 13 so as to fit along the wearer's thigh. The width of the position close to 11 is the narrowest. The side edges 19 and 20 are straight in the front waistline region 11 and the back waistline region 12. The side edges 19 and the side edges 20 of the front and rear waist areas 11 and 12 facing each other are overlapped and joined by a seam portion 22 that intermittently extends in parallel to each other in the longitudinal direction Y. A waistline opening 16 is formed by the edges 17 and 18, and a pair of leg opening 21 is formed by the side edges 19 and 20 located in the crotch region 13. The joining of the front and rear waist regions 11 and 12 in the seam portion 22 can be performed by a known method such as heat welding, ultrasonic welding, or adhesion with a hot melt adhesive.

  The chassis 14 has a fiber nonwoven fabric base sheet 25 located on the skin facing surface, and fiber nonwoven fabric front and rear waist sheets 26 and 27 located on the non-skin facing surface side and facing each other in the longitudinal direction Y. . The base sheet 25 has front and rear waist regions 11 and 12 and a crotch region 13, the front waist sheet 26 is disposed in the front waist region 11, and the rear waist sheet 27 is disposed in the rear waist region 12. The base sheet 25 has a front end edge 25a and a rear end edge 25b that face each other in the vertical direction Y, and both side edges 25c and 25d that face each other in the horizontal direction X. Both side edges 25c, 25d are composed of a straight portion in the front and rear waist regions 11, 12, and a curved portion that is recessed toward the liquid absorbing structure 15 in the crotch region 13.

  The front waist sheet 26 is a trapezoidal sheet member that forms the front waistline region 11 and a part of the crotch region 13, and includes an intermediate inner edge 26a and an outer edge 26b that extend in parallel in the lateral direction X, Both outer edges 26c, 26d extending in the longitudinal direction Y from both ends of the end edge 26b, and both side curved end edges 26e, 26f that connect each end of both outer edges 26c, 26d and both ends of the intermediate inner edge 26a. . The curved side edges 26e and 26f on both sides extend from the ends of the outer edges 26c and 26d so as to approach each other in the lateral direction X, and from the straight parts toward both ends of the intermediate inner edge 26a. Each has a curved portion extending while curving. The front waist seat 26 has a rectangular main body 71 extending in the lateral direction X between both outer edges 26c and 26d, and a narrower width than the main body 71, and is located between the curved curved edges 26e and 26f. It is divided into an output part 72.

  As shown in FIG. 3, the front waist sheet 26 can be folded along a front folding curve 63 extending in the lateral direction X between both outer edges 26 c and 26 d extending in the longitudinal direction Y, and the front waistline of the base sheet 25 It has the front bending part 35 which covers a part of skin opposing surface of the area | region 11, and the front-end part cover part 39 joined to the non-skin opposing surface of the front waistline area 11 of the base sheet 25. FIG. The front folding curve 63 coincides with the upper end edge 17 of the front waistline region 11. Further, the shape of the front end cover portion 39 of the front waist sheet 26 corresponds to the shape of the front waistline region 11 of the base sheet 25.

  The rear waist sheet 27 has a substantially trapezoidal shape that forms the rear waistline region 12 and a part of the crotch region 13, and includes an intermediate inner edge 27a and an outer edge 27b that extend in parallel in the lateral direction X, and an outer edge. From both outer edges 27c, 27d extending in the longitudinal direction Y from both ends of the edge 27b, and both curved inner end edges 27e, 27f connecting the ends of the outer edges 27c, 27d and both ends of the inner edge 27a, respectively. It is formed. The rear waist seat 27 has a rectangular main body 73 extending in the lateral direction X between both outer edges 27c and 27d, and is narrower than the main body 73, and is located between the inner end edges 27e and 27f on both sides. It is divided into a trapezoidal extension 74.

  The rear waist sheet 27 is bent along a rear folding curve 64 extending in the lateral direction X between both outer edges 26c and 26d extending in the longitudinal direction Y, and a part of the skin facing surface of the rear waistline region 12 of the base sheet 25 And a rear end cover portion 36 joined to the non-skin facing surface of the rear waistline region 12 of the base sheet 25. The rear folding curve 64 coincides with the upper end edge 18 of the rear waistline region 12. Further, the shape of the rear end cover portion 36 of the rear waist sheet 27 corresponds to the shape of the rear waistline region 12 of the base sheet 25.

Examples of the sheet material forming the base sheet 25 and the front and rear waist sheets 26 and 27 include a spunbond fiber nonwoven fabric having a mass per unit area of about 10 to 40 g / m ² and an SMS (spunbond / meltblown / spunbond) fiber nonwoven fabric. In addition, an air-through fiber nonwoven fabric, a plastic sheet, or a laminate sheet thereof can be used. By way of example, with SMS fibrous nonwoven fabric mass per unit area of about 12~18g / ^{m 2} to the base sheet 25, the front and rear waist sheets 26, 27 per unit area weight of about 14~40g / ^{m 2} A non-woven fabric of spunbond fibers can be used. The front and rear waist sheets 26 and 27 constituting the outer surface of the diaper 10 can be subjected to secondary processing such as quilt embossing, for example. In this embodiment, an SMS fiber nonwoven fabric having a mass per unit area of about 13 g / m ² is used for the base sheet 25, and a spunbond fiber having a mass per unit area of about 27 g / m ² is used for the front and rear waist sheets 26 and 27. Nonwoven fabric is used.

2 to 4, the liquid absorbing structure 15 includes a front end edge 15a positioned on the front waistline region 11 side, a rear end edge 15b positioned on the rear waistline region 12 side, and the front and rear end edges 15a and 15b. And a central portion 15c. The liquid-absorbing structure 15 is configured by sandwiching a body fluid-absorbing absorber 51 between a liquid-permeable sheet 50 positioned on the skin facing surface side and a leak-proof sheet 53 positioned on the non-skin facing surface side. . In the liquid absorption structure 15, the front end edge portion 51 a and the rear end edge portion 51 b of the absorber 51 are positioned inside the front end edge 15 a and the rear end edge 15 b of the liquid absorption structure 15, respectively. The liquid-permeable sheet 50 is made of a liquid nonwoven fabric having liquid permeability, and the leak-proof sheet 53 is made of a liquid-impervious thermoplastic resin film or fiber nonwoven fabric. The absorbent body 51 includes a core material 55 made of a mixture of fluff pulp having a mass per unit area of about 0 to 500 g / m ² and absorbent polymer particles, and a transparent paper such as a tissue paper covering the entire core material 55. And a liquid wrap sheet 56.

  3 and 4, the front end edge 15 a and the center portion 15 c of the liquid absorbing structure 15 are arranged on the skin facing surface side of the base sheet 25 from the front end edge 25 a of the front waistline region 11 through the crotch region 13 and the rear waistline region. 12, the rear end edge 15 b of the liquid absorbing structure 15 is vertically extended from the first joint area 61 along the rear end edge 25 b of the base sheet 25. Joined to the second joining region 62 formed apart in the direction Y. The first and second joining regions 61 and 62 are formed by applying a hot melt adhesive.

  As described above, the front waistline region 11 and the rear waistline region 12 are provided with first to third elastic regions 41, 42, 43 in order along the direction from the upper end edges 17, 18 toward the leg opening 21. It has been. Referring to FIG. 2, the first elastic region 41 extends in the lateral direction X along the upper edges 17 and 18 of the front and rear waist regions 11 and 12, and the second elastic region 42 is separated from the first elastic region 41 in the Y direction. Thus, the third elastic region 43 extends in the lateral direction X away from the second elastic region 42 in the Y direction. A first separation region 44 extends in the lateral direction X between the first elastic region 41 and the second elastic region 42, and a second separation region 45 is formed between the second elastic region 42 and the third elastic region 43. It extends in the lateral direction X.

  The first elastic region 41 of the front waistline region 11 is configured by joining a plurality of first elastic yarns 31 in a state of extending in the lateral direction X along the upper edge 17 of the front waistline region 11. . Specifically, as shown in FIGS. 3 and 4, the plurality of first elastic yarns 31 are joined to the front waist sheet 26 in an expanded state, and the elastic yarn 31 closest to the outer edge 26 b is folded forward of the front waist sheet 26. The curved line 63, that is, the upper end edge 17 of the front waistline region 11 is disposed, and the remaining first elastic yarn 31 is disposed so as to be positioned between the front folding line 63 and the front end edge 25a of the base sheet 25. Further, the plurality of first elastic yarns 31 constituting the first elastic region 41 are sandwiched inside the front bent portion 35 of the front waist sheet 26 that is folded along the front folding curve 63. In the front waistline region 11, the first elastic region 41 is separated from the front end edge 15 a of the liquid absorbing structure 15 in the longitudinal direction Y.

  Similarly to the front waistline region 11, the first elastic region 41 of the rear waistline region 12 is joined to the rear waist sheet 27 in a stretched state with the plurality of second elastic yarns 32, and the back bent portion 38 is bent forward. 64 and is sandwiched between the inner sides folded back along 64. Even in the rear waistline region 11, the first elastic region 41 is separated from the rear end edge 15 b of the liquid absorbing structure 15 in the longitudinal direction Y.

  In the front and rear waist regions 11 and 12, the dimensions of the first elastic region 41 in the longitudinal direction Y are the same. For the plurality of first elastic yarns 31 and second elastic yarns 32 constituting the first elastic region 41, for example, a 470 to 1240 dtex strand-like or string-like elastic body can be used. In the present embodiment, the first elastic yarn 31 and the second elastic yarn 32 are both 780 dtex rubber thread. Further, the expansion ratio of the plurality of first and second elastic yarns 31 and 32 and the third and fourth elastic yarns 33 and 34 constituting the third elastic region 43 described later is 1.5 to 5.0. The range can be doubled, and is preferably in the range of 2.0 times to 3.5 times. In each first elastic region 41 of the front and rear waist regions 11 and 12, five thread rubbers are arranged at a pitch of 6 mm (a pitch is a distance between longitudinal center lines of adjacent thread rubbers), and an expansion ratio Is bonded to the front and rear waist regions 11 and 12 by a hot melt adhesive (not shown) in a state where the length is extended 2.8 times.

  The second elastic region 42 includes a front second elastic region 42A disposed in the front waistline region 11 and a rear second elastic region 42B disposed in the rear waistline region 12. In the present embodiment, the separation dimension L1 from the lower end 67 of the front second elastic region 42A to the upper end edge 17 of the front waistline region 11 is larger than the lower end 68 of the rear second elastic region 42B to the upper end edge 18 of the rear waistline region 12. Is larger than the separation distance L2 (see FIG. 4). However, the case where the separation dimension L1 is the same as the separation dimension L2 and the case where the separation dimension L1 is smaller than the separation dimension L2 are also included in the scope of the present invention. In the following description, the points common to the front second elastic region 42A and the rear second elastic region 42B will be described by taking the front second elastic region 42A as an example.

  3 and 4, the front second elastic region 42 </ b> A of the front waistline region 11 is configured to be joined to the skin facing surface of the base sheet 25 in a state where the elastic nonwoven fabric 60 is extended in the lateral direction X. Yes. More specifically, in the state where the elastic nonwoven fabric 60 is extended on the skin facing surface of the base sheet 25 to which the liquid absorbing structure 15 is bonded, the central portion of the elastic nonwoven fabric 60 is the front edge 15a of the liquid absorbing structure 15. Is bonded to the skin facing surface of the base sheet 25. By joining the central part of the elastic nonwoven fabric 60 to another member in this way, the both sides of the diaper 10 that are easily reachable by the elderly can be removed from the diaper 10 while suppressing the curvature of the central part of the elastic nonwoven fabric 60. It can make it easy to curve toward the direction. Further, even when one of the curved portions formed on both side portions of the diaper 10 is pulled, the central portion of the elastic nonwoven fabric 60 is joined to another member, so that the shape of the other curved portion does not collapse. . Moreover, if the elastic nonwoven fabric 60 is arrange | positioned in the skin opposing surface of the base sheet 25, the front waist sheet 26 which comprises the outer surface of the diaper 10 will become easy to curve outside because the skin opposing surface of the diaper 10 will shrink | contract.

  The front second elastic region 42A extends in the transverse direction X between the side edges 19 and 20 of the front waistline region 11, and in the longitudinal direction Y from the first and third elastic regions 41 and 43, the first separation region 44 and the second separation region 44A. They are separated with a separation area 45 in between. By interposing the first and second separation regions 44 and 45 in this way, the front second elastic region 42A can be prevented from contracting due to the contraction of the first and third elastic regions 41 and 43. The front second elastic region 42 </ b> A is easily bent outward from the diaper 10. Therefore, it becomes easier to grasp the front second elastic region 42A curved toward the outside of the diaper 10 with a finger. Moreover, when inserting a finger into the inner side of the diaper 10, the finger can easily enter the pocket portion on the back side of the curved portion of the front second elastic region 42A, and the finger will not slip off. The separation distance between the front second elastic region 42A and the first elastic region 41 and the separation distance between the front second elastic region 42A and the third elastic region are preferably 10 to 40 mm. Moreover, it is preferable that the dimension in the vertical direction Y of 42 A of front 2nd elastic regions is 20 mm or more. If each dimension is set in this way, the curved portion formed by the front second elastic region 42A and the first and second separation regions 44 and 45 is made large enough for an elderly person to grasp with a finger. be able to.

In this embodiment, the upper end 60a on the side close to the first elastic region 41 among the both ends of the elastic nonwoven fabric 60 is covered with the front bent portion 35 of the front waist sheet 26 (see FIG. 4). A portion of the elastic nonwoven fabric 60 that is not covered with the front bent portion 35 is exposed inside the diaper 10. Thus, by exposing the elastic nonwoven fabric 60 to the inner side of the diaper 10, the exposed portion becomes flat, and generation of wrinkles on the skin facing surface of the diaper 10 can be suppressed. Furthermore, when the upper end 60a of the elastic nonwoven fabric 60 is covered with the front waist sheet 26 which is a sheet member covering the outer surface of the diaper 10, the upper edge 17 of the diaper 10 and the elastic nonwoven fabric when the finger is inserted inside the diaper 10. Since it is possible to prevent a finger from being caught on the upper end 60a of 60, the finger can be easily put into the pocket portion.
The above description also applies to the rear second elastic region 42B disposed in the rear waistline region 12.

  On the other hand, as shown in FIG. 4, the separation dimension L1 from the lower end 67 of the front second elastic region 42A to the upper end edge 17 of the front waistline region 11 is larger than the lower end 68 of the rear second elastic region 42B. It is larger than the separation dimension L2 to the upper edge 18 of. Therefore, when wearing the diaper 10, the lower end 60b of the elastic nonwoven fabric 60 on the front waistline region 11 side is positioned below the lower end 60b of the elastic nonwoven fabric 60 on the rear waistline region 12 side. In other words, when the separation dimension L1 is larger than the separation dimension L2 as in the present embodiment, the lower end 60b of the elastic nonwoven fabric 60 on the front waistline region 11 side is located near the crotch region 13, so An operation of grasping the curved portion formed by the region 42A and pulling up the crotch region 13 to an appropriate position becomes easy. On the other hand, since the rear second elastic region 42B is located near the upper edge 18 of the rear waistline region 12, even an elderly person who is difficult to turn his back easily grasps the curved portion formed by the rear second elastic region 42B. The diaper 10 can be pulled up.

As the elastic nonwoven fabric 60 constituting the second elastic region 42 of the present embodiment, a known nonwoven fabric having elasticity and composed of fibers of thermoplastic elastomer and fibers of thermoplastic resin can be used. The elastic nonwoven fabric 60 may be elastic only in one direction, or may be elastic in two or more directions. If an elastic nonwoven fabric 60 having a low slip property is used, it is possible to make it difficult to slip when grasping with a finger and pulling it up. The stretch magnification in the transverse direction X of the elastic nonwoven fabric 60 constituting the second elastic region 42 is in the range of 1.5 times to 5.0 times, and preferably in the range of 1.5 times to 3.0 times. . In addition, the stretch ratio in the transverse direction X of the elastic nonwoven fabric 60 is such that the first and second elastic yarns 31 and 32 constituting the first elastic region 41 and the third and fourth elasticity constituting the third elastic region 43 described later. It is preferably lower than the expansion ratio of the yarns 33 and 34. In both the front second elastic region 42A and the rear second elastic region 42B of the present embodiment, the elastic nonwoven fabric 60 having a mass per unit area of 28 g / cm ² is expanded in the transverse direction X at an expansion ratio of 1.8 times. Used. The distance L1 between the front second elastic region 42A, that is, the lower end 67 of the elastic nonwoven fabric 60 and the upper edge 17 of the front waistline region 11, is 100 mm, and the rear second elastic region 42B, that is, the lower end 68 of the elastic nonwoven fabric 60, to the rear waistline region. The separation dimension L2 to 12 upper edge 18 is 80 mm. The separation distance from the front second elastic region 42A to the first elastic region 41 is 21 mm, the separation distance from the front second elastic region 42A to the third elastic region 43 is 20 mm, and the first elastic region to the first elastic region 42B. The separation distance to the region 41 is 11 mm, the separation distance from the rear second elastic region 42B to the third elastic region 43 is 10 mm, the dimension of the front second elastic region 42A in the longitudinal direction Y is 50 mm, and the rear second elastic region The dimension of 42B is 40 mm.

  The third elastic region 43 extends in the lateral direction X between the second elastic region 42 and the leg opening 21 in the front and rear waist regions 11 and 12. The third elastic region 43 of the front waistline region 11 extends a plurality of third elastic yarns 33 between the main body 71 of the front waistsheet 26 and the non-skin facing surface of the front waistline region 11 of the base sheet 25. It is configured to be joined in the state of being allowed. Further, the third elastic region 43 overlaps the liquid absorbing structure 15 bonded to the skin facing surface of the base sheet 25 in the thickness direction of the diaper 10. In the present invention, it is preferable that the front and rear end edge portions 51 a and 51 b of the absorber 51 are positioned below the upper end 69 of the third elastic region 43 in each of the front and rear waist regions 11 and 12. In the front waistline region 11 of the present embodiment, the front end edge 51 a of the absorber 51 is located in the third elastic region 43, but is separated from the upper end 69 of the third elastic region 43. Further, in the central portion of the third elastic region 43 of the front waistline region 11, a non-elastic region 46 that is formed by cutting the plurality of third elastic yarns 33 and overlaps the liquid absorbing structure 15 is provided. . Instead of this, even if the third elastic yarns 33 are continuously extended in the lateral direction X in the front waistline region 11 without providing the inelastic region 46, the scope of the present invention is not limited. included.

  The third elastic region 43 of the rear waistline region 12 is in a state in which a plurality of fourth elastic yarns 34 are extended between the rear waist sheet 26 and the non-skin facing surface of the rear waistline region 12 of the base sheet 25. It is configured to be joined by a hot melt adhesive (not shown). In the rear waist region 12, the absorber 51 included in the liquid absorbing structure 15 and the third elastic region 43 do not overlap, and the upper end 69 of the third elastic region 43 is the rear end edge 51b of the absorber 51. It is away from. As described above, since the upper end 69 of the third elastic region 43 and the front and rear end edges 51a and 51b of the absorber 51 are separated from each other in the front and rear waist areas 11 and 12, the front and rear end edges 51a and 51b are separated. And the contraction of the fourth elastic yarn 34 located between the upper end 69 of the third elastic region 43 is not inhibited by the absorbent body 51. Therefore, the third elastic region 43 can be greatly contracted with respect to the second elastic region 42, and the bending of the second elastic region 42 can be promoted.

  The dimensions in the longitudinal direction Y of the third elastic region 43 of the front and rear waist regions 11 and 12 are the same. In the present embodiment, six 780 dtex thread rubbers are used as the plurality of third elastic threads 33 constituting the third elastic region 43 of the front waistline region 11, these thread rubbers are arranged at a pitch of 10 mm, and an expansion ratio of 3 In a state of being stretched by a factor of 2, the front waist sheet 26 and the base sheet 25 are joined by a hot melt adhesive (not shown). Further, six 940 dtex yarn rubbers were used as the plurality of third elastic yarns 33 constituting the third elastic region 43 of the rear waistline region 12, arranged at a pitch of 10 mm, and extended at an extension magnification of 3.2 times. In this state, the rear waist sheet 27 and the base sheet 25 are joined by a hot melt adhesive.

  Further, between the extended portion 74 of the rear waist sheet 27 of the diaper 10 and the base sheet 25, the rear part of the leg opening edge in the crotch region 13, that is, both sides from the lower end side of the outer edges 27 c and 27 d of the rear waist sheet 27. A plurality of leg elastic bodies 37 extending curvedly along the inner end edges 27e and 27f and extending across the crotch region 13 to the lower end of the intermediate inner end edge 27a are joined so as to be elastically expandable and contractible. Yes.

  As described above, in the diaper 10 according to this embodiment, the expansion ratio of the elastic nonwoven fabric 60 in the second elastic region 42 is that of the first to fourth elastic yarns 31 to 34 in the first and third elastic regions 41 and 43. It is lower than the expansion ratio. Specifically, the expansion ratio of the elastic member (first and second elastic yarns 31 and 32) in the first elastic region 41 is 2.8 times, and the expansion ratio of the elastic member (elastic nonwoven fabric 60) in the second elastic region 42. Is 1.8 times, and the expansion ratio of the elastic members (third and fourth elastic yarns 33 and 34) in the third elastic region 43 is 3.2 times. In this way, all elastic members such as the elastic nonwoven fabric 60 and the first to fourth elastic yarns 31 to 34 are arranged on the diaper 10 whose expansion ratio of the second elastic region 42 is lower than that of the first and third elastic regions 41 and 43. Changes in the appearance of the diaper 10 before and after elastically relaxing are schematically shown in FIG. In addition, illustration of the leg elastic body 37 is abbreviate | omitted in FIG.

  As shown in FIGS. 2 and 3, the diaper 10 of the present embodiment includes an elastic nonwoven fabric 60 and first to fourth elastic yarns 31 to 34 on a base sheet 25 having a predetermined shape, front and rear waist sheets 26 and 27, and the like. It is manufactured by joining in the stretched state. FIG. 5A shows the appearance when the front and rear waist regions 11 and 12 are joined by the seam portion 22 while maintaining the expansion ratio of each elastic member joined to the first to third elastic regions 41 to 43. FIG. 2 is a schematic view showing the diaper 10 as viewed from the front. As shown to Fig.5 (a), when the expansion ratio of each elastic member is maintained, the dimension in the horizontal direction X of the 1st-3rd elastic regions 41-43 is equal.

  When each elastic member provided in the first to third elastic regions 41 to 43 is elastically relaxed from the state shown in FIG. 5A, each elastic member contracts in the lateral direction X, and FIG. ). At this time, since the expansion ratio of the second elastic region 42 is smaller than that of the first and third elastic regions 41, 43, the contraction rate of the second elastic region 42 is smaller than that of the first and third elastic regions 41, 43. Become. As a result, the dimension in the lateral direction X of the second elastic region 42 is larger than the dimension in the lateral direction X of the first and third elastic regions 41, 43, and the diaper 10 is larger than the first and third elastic regions 41, 43. Protruding outward. Further, the first and second separation regions 44 and 45 located on both sides of the second elastic region 42 follow the second elastic region 42 and outward from the diaper 10 from the first and third elastic regions 41 and 43. By projecting, a shape in which the second elastic region 42 is curved outward of the diaper 10 is formed.

  When the first and third elastic regions 41 and 43 contract, the front and rear waist sheets 26 and 27 and the base sheet 25 also contract. If the first and second separation regions 44 and 45 are provided, the influence of the contraction of the first and third elastic regions 41 and 43 on the second elastic region 42 is mitigated. As a result, it is possible to prevent the second elastic region 42 from being easily bent outward from the diaper 10. Usually, in the case of a wearing article composed of a fiber nonwoven fabric and an elastic member such as thread rubber, the separation distance between the second elastic region 42 and the first elastic region 41, and the second elastic region 42 and the third elastic region 43 By setting the distance between the first elastic region 41 and the third elastic region 41 and 43 to be 10 to 40 mm, the contraction effect of the first and third elastic regions 41 and 43 can be made difficult to reach the second elastic region 42. However, without providing the first and second separation regions 44 and 45, the width of the second elastic region 42 is widened, and the contraction of the first and third elastic regions 41 and 43 at the center of the second elastic region 42 is achieved. The second elastic region 42 can be curved outward of the diaper 10 by preventing the influence of the above.

  As described above, by joining the front end edge 15a of the liquid absorbing structure 15 to the central portion of the second elastic region 42, the both side portions of the diaper 10 that are easy for an elderly person to reach are placed outside the diaper 10. It can be curved toward. In order for the second elastic region 42 to be easily bent outward of the diaper 10, it is preferable not to inhibit the contraction of the first and third elastic regions 41, 43. It is preferable that the absorber 51 included in the layer does not overlap or only partially overlaps.

  As is apparent from the above description, in the present invention, the contraction rate of the second elastic region 42 is smaller than the contraction rates of the first and third elastic regions 41 and 43, and thus the first to third elastic regions 41. When -43 is in an elastically relaxed state, the second elastic region 42 curves toward the outside of the diaper 10 (wearing article). The shrinkage rate of the first to third elastic regions 41 to 43 can be evaluated as follows.

  As shown in FIG. 2 or 5, the diaper 10 is in a state in which each elastic member is extended and expanded in a planar shape, and in that state, on each side X of each of the first to third elastic regions 41 to 43. A pair of measurement points is defined. A pair of measurement points can be determined by marking the seam portion 22. First, with each elastic member extended, the shortest distance a between the pair of measurement points is measured for each of the first to third elastic regions 41 to 43, and then each elastic member is relaxed. The shortest distance b between the pair of measurement points is measured. For the measurement of the shortest distance, a measure may be used, or an image analysis apparatus may be used. The shrinkage rate of each of the first to third elastic regions 41 to 43 can be determined by shrinkage rate (%) = {(ab) / a} × 100. When the seam portion 22 is curved, the contraction rate of the second elastic region is evaluated at a portion where the value of the shortest distance b between the pair of measurement points is maximum when each elastic member is relaxed. The contraction rate of each of the third elastic regions 41 and 43 is evaluated at a portion where the value of the shortest distance b between the pair of measurement points is minimum when each elastic member is relaxed.

Second Embodiment
With reference to FIGS. 6-8, this embodiment replaces with the elastic nonwoven fabric 60, in each of the front waist sheet 26 and the back waist sheet 27, between the 1st elastic area | region 41 and the 3rd elastic area | region 43, A plurality of fifth elastic yarns 65 are joined to be elastically stretchable and covered with the base sheet 25, and are the same as in the first embodiment except that the second elastic region 42 is formed. Hereinafter, differences from the first embodiment will be described.

  Similarly to the first embodiment, the fifth elastic yarn 65 of the present embodiment also has a lower expansion ratio than the first to fourth elastic yarns 31 to 34 used in the first and third elastic regions 41 and 43. For example, the expansion ratio can be 1.8 times. Moreover, it is preferable that the 5th elastic thread 65 is low dtex compared with the 1st-4th elastic threads 31-34.

  Between the second elastic region 42 and the first and third elastic regions 41, 43, first and second separation regions 44, 45 are provided. The separation distance between the first elastic region 41 and the second elastic region 42 in the front waistline region 11 is closest to the first elastic region 41 and the longitudinal center line of the first elastic yarn 31 closest to the second elastic region 42. The shortest distance from the longitudinal center line of the fifth elastic yarn 65, and the separation distance between the second elastic region 42 and the third elastic region 43 is the longitudinal direction of the fifth elastic yarn 65 closest to the third elastic region 43. This is the shortest distance between the center line and the longitudinal center line of the third elastic yarn 33 closest to the second elastic region 42. The same applies to the rear waistline region 12. Also in the present embodiment, the second elastic region 42 is curved outwardly of the diaper 10 because the contraction rate of the second elastic region 42 is smaller than the contraction rate of the first and third elastic regions 41 and 43. it can.

  In the first and second embodiments described above, the example in which the front and rear bent portions 35 and 38 of the front and rear waist sheets 26 and 27 are formed from the same sheet material as the main portions 71 and 73 has been described. However, it is also possible to form the front and rear bent portions 35 and 38 from a sheet material separate from the main portions 71 and 73 and fix them to the skin facing surfaces of the main portions 71 and 73. In addition, barrier cuff sheets for preventing leakage can be provided on both side edges of the liquid absorbing structure 15. Moreover, it can replace with the elastic nonwoven fabric 60 used in 1st Embodiment, and can also use the composite nonwoven fabric which joined the strip | belt-shaped nonwoven fabric piece to the strip | belt-shaped nonwoven fabric piece so that elasticity was possible elastically. In the above embodiment, the joining is performed by a hot melt adhesive unless otherwise specified, but the joining can also be performed by thermal welding or ultrasonic welding. For each constituent member constituting the disposable diaper 10 of the present invention, various known materials that are usually used in disposable wearing articles can be used without limitation in addition to the materials described in the specification. In the specification and claims, the terms “first” to “fifth” are used to simply distinguish similar elements, positions, and the like.

  The disclosure relating to the present invention described above can be summarized in at least the following matters.

A front waistline region, a rear waistline region, and a crotch region, a liquid absorbing structure that extends from the front waistline region through the crotch region to the back waistline region, a waistline opening formed by the upper edge of the front and back waistline region, and a crotch region A disposable pants-type wearing article having a pair of leg-hole openings located on both sides and having a waist elastic region in which the front-rear waist region can be elastically extended in the waist direction. The first elastic region, the second elastic region, and the third elastic region are arranged in order from the leg opening to the leg opening, the first elastic region extends along the upper edge of the front and rear waist region, and the third elastic region is the first elastic region. The second elastic region extends between the second elastic region and the leg opening, the contraction rate of the second elastic region in the waist direction is smaller than the contraction rate of the first and third elastic regions, and the first to third elastic regions are When in an elastically relaxed state, the second elastic region is Curved toward the outside of the use the article, the second elastic region consists of a rear second elastic region disposed in the rear waist region and a front second elastic region disposed in front waistline region, the forward second elastic region The separation dimension from the lower end of the rear waist area to the upper edge of the front waistline area is larger than the separation dimension from the lower edge of the rear second elastic region to the upper edge of the rear waistline area .

The present invention disclosed in the above paragraph can include at least the following embodiments.
( 1 ) The front end edge and the rear end edge of the liquid absorbing structure are respectively joined to the second elastic region in the front waistline region and the second elastic region in the rear waistline region.
( 2 ) The liquid-absorbing structure has an absorbent body sandwiched between the liquid-permeable sheet and the leak-proof sheet, and in the liquid-absorbing structure, the front edge portion and the rear edge portion of the absorbent body are respectively absorbent. It is located inside the front edge and the rear edge of the liquid structure, and the front and rear edge portions of the absorber are respectively positioned below the upper end of the third elastic region in the front and rear waist area.
( 3 ) The dimension in the direction orthogonal to the waist direction of the second elastic region is 20 mm or more.
( 4 ) The second elastic region is separated from the first elastic region and the third elastic region, and the separation distance between the second elastic region and the first elastic region and the third elastic region is 10 to 40 mm, respectively. .
( 5 ) The second elastic region is composed of an elastic nonwoven fabric.
( 6 ) At least a part of the elastic nonwoven fabric is exposed inside the wearing article.
( 7 ) The wearing article includes a sheet member constituting the outer surface, and the upper end of the elastic nonwoven fabric located on the side close to the first elastic region in the elastic nonwoven fabric disposed in the front and rear waist region wears the sheet member constituting the outer surface. It is folded and covered inside the article.
( 8 ) The second elastic region is composed of a plurality of elastic yarns.

DESCRIPTION OF SYMBOLS 10 Diaper 11 Front waistline area 12 Rear waistline area 13 Crotch area 15 Liquid absorption structure 15a Front edge 15b of liquid absorption structure Rear edge 16 of liquid absorption structure Upper opening edge 18 of front waistline Area of rear waistline Upper edge 21 Leg opening 26 Front waist seat (seat member constituting the outer surface)
27 Rear waist seat (seat member constituting the outer surface)
40 waist circumference elastic region 41 first elastic region 42 second elastic region 42A front second elastic region 42B rear second elastic region 43 third elastic region 44 first separation region 45 second separation region 50 liquid permeable sheet 51 absorber 51a absorption Body front edge 51b Absorber rear edge 53 Leakproof sheet 60 Elastic nonwoven fabric 60a Elastic nonwoven fabric upper end 60b Elastic nonwoven fabric lower end 65 Fifth elastic yarn (plural elastic yarns)
67 Lower end of front second elastic region 68 Lower end of rear second elastic region 69 Upper end L1 of third elastic region Separation dimension L2 Separation dimension

Claims (9)

A front waistline region, a rear waistline region, and a crotch region; a liquid absorbing structure that extends from the front waistline region through the crotch region to the rear waistline region; and a waistline opening formed by an upper end edge of the front and back waistline region; A disposable pants-type wearing article having a pair of leg openings that are located on both sides of the crotch region, and a waist elastic region in which the front and rear waist regions can be elastically extended in the waist direction,
In the waist elastic region, a first elastic region, a second elastic region, and a third elastic region are arranged in order from the waist opening to the leg opening, and the first elastic region is located in the front and back waist region. Extending along the upper edge, the third elastic region extending between the second elastic region and the leg opening,
The shrinkage rate of the second elastic region in the waist direction is smaller than the shrinkage rates of the first and third elastic regions,
When the first to third elastic regions are in an elastically relaxed state, the second elastic region is curved toward the outside of the wearing article ,
The second elastic region includes a front second elastic region disposed in the front waistline region and a rear second elastic region disposed in the rear waistline region, and the front waistline from a lower end of the front second elastic region. A wearing article , wherein a separation dimension from the lower end of the rear second elastic region to the upper end edge of the rear waistline region is larger than a separation dimension from the lower end of the rear second elastic region . The wearing article according to claim 1, wherein a front end edge and a rear end edge of the liquid absorbing structure are respectively joined to the second elastic region in the front waistline region and the second elastic region in the rear waistline region. . The liquid absorbing structure has an absorbent body sandwiched between a liquid-permeable sheet and a leak-proof sheet,
In the liquid absorption structure, the front edge and the rear edge of the absorber are located inside the front edge and the rear edge of the liquid absorption structure, respectively.
The wearing article according to claim 2 , wherein the front and rear end edge portions of the absorber are respectively positioned below the upper end of the third elastic region in the front and rear waistline region. The wearing article in any one of Claims 1-3 whose dimension in the direction orthogonal to the said trunk periphery direction of the said 2nd elastic region is 20 mm or more. The second elastic region is separated from the first elastic region and the third elastic region, and a separation distance between the second elastic region and the first elastic region and the third elastic region is 10 to 10, respectively. The wearing article in any one of Claims 1-4 which is 40 mm. The wearing article according to any one of claims 1 to 5 , wherein the second elastic region is formed of an elastic nonwoven fabric. The wearing article according to claim 6 , wherein at least a part of the elastic nonwoven fabric is exposed inside the wearing article. The wearing article includes a sheet member that constitutes the outer surface thereof, and the upper end of the elastic nonwoven fabric that is located on the side closer to the first elastic region in the elastic nonwoven fabric that is disposed in the front-rear waist region constitutes the outer surface. The wearing article according to claim 6 or 7 , wherein a member is folded and covered inside the wearing article. The wearing article according to any one of claims 1 to 5 , wherein the second elastic region is composed of a plurality of elastic yarns.

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