JP5766855B1 - Pants-type wearing items - Google Patents

Abstract

An object of the present invention is to provide a pants-type wearing article that is an improvement of the prior art and does not cause a positional shift of the rear waist region even when the front waist region is lowered. An imaginary line extending in parallel with a longitudinal center line P and passing through a vertex 20 located at an edge of a waist opening 23 of the side seam 22 is further provided, and the side seam 22 is rearward from the vertex 20. The first portion 22A extends in a downward gradient, and the second portion 22B is bent from the first portion 22A and extends forward in a downward gradient and intersects the virtual line 80. [Selection] Figure 1

Description

  The present invention relates to a pants-type wearing article.

  Conventionally, a pants-type wearing article having a side seam that connects both side edges of the front waist region and both side edges of the rear waist region is known. For example, Patent Literature 1 discloses a pants-type wearing article in which a side seam extends linearly in the vertical direction.

JP 2009-131539 A (P2009-131539A)

  In the wearing article disclosed in Patent Document 1, the side seam is formed of a plurality of welded portions arranged in a straight line in the vertical direction and at predetermined intervals, and the welded portion is relatively Therefore, when the side seam is peeled from one end in the vertical direction to the other end, the peeling force can be easily peeled off by concentrating it on the welded portion.

  However, since the side seam has a shape extending linearly in the vertical direction, for example, in the wearing state, the wear assistant holds the front waist region in order to place a separate absorbent pad on the worn article. Then, when the waist opening is expanded obliquely downward, a force is applied to the entire side seam so that the side seam is lowered obliquely forward, so that the rear waist region is generally lowered downward. Therefore, when it is worn as it is, it not only impairs the feeling of wearing, but may cause leakage of excrement. Also, when correcting the position of the rear waist region, it is necessary to adjust the absorption pad so that it does not shift while the rear waist region is lifted to an appropriate position after the absorption pad is arranged. .

  An object of the present invention is to provide a pant-type wearing article that is an improvement of the conventional technique and that does not cause a positional shift of the rear waist region even when the front waist region is pulled down in a worn state.

  The present invention for achieving the above object has a longitudinal center line that has a longitudinal direction and a transverse direction perpendicular thereto, a vertical direction in a worn state, and a longitudinal direction perpendicular thereto, and divides the transverse dimension into two equal parts. A chassis having a skin facing surface and a non-skin facing surface on the opposite side, a front waist region, a rear waist region, and a crotch region located between the front and rear waist regions, and a liquid absorption attached to the chassis The improvement is in a pants-type wearing article including a structure, a side seam that connects both side edges of the front and rear waist regions, a waist opening, and a pair of leg openings.

The wearing article according to the present invention further includes an imaginary line that extends in parallel with the longitudinal center line and passes through a vertex located at an edge of the waist opening of the side seam, and the side seam includes the vertex. A first portion extending downward and backward from the first portion, and a second portion bent from the first portion and extending downward and forward and intersecting the imaginary line, and the front waist region includes the lateral direction A plurality of front waist elastic regions having a plurality of front waist elastic bodies extending in the lateral direction, and the rear waist region having a rear waist elastic region in which the plurality of rear waist elastic bodies extending in the lateral direction are disposed. In the bent portion of the side seam, the extension stress of the rear waist elastic region facing in the front-rear direction is higher than the extension stress of the front waist elastic region, and is below the second portion of the side seam. Te, the spaced distance in the longitudinal direction of the front waist elastic member adjacent to each other, and wherein the smaller than the separation dimension in the longitudinal direction of the rear waist elastic member adjacent to each other.

  In the pants-type wearing article according to the present invention, the side seam has a first part extending downward from the apex to the rear and a second part bent from the first part and extending forward and downward. When the front waist region is pulled diagonally downward to widen the waist opening, the first portion is pulled diagonally forward and slides downward, whereas the second portion is not or hardly affected by the pulling force, The entire rear waist area does not slide down greatly.

The drawings illustrate certain embodiments of the invention according to the present disclosure and include selective and preferred embodiments as well as essential configurations of the invention.
The perspective view which looked at the disposable diaper shown as an example of the underpants type wearing article concerning this indication from the back side. The partial fracture | rupture expansion | deployment top view of the diaper extended to the vertical direction and the horizontal direction until the maximum expansion | extension of each elastic body (to the extent that the gathers by the contraction effect | action of an elastic body are lost). The partially broken disassembled perspective view of a diaper. FIG. 4 is a schematic cross-sectional view taken along line IV-IV in FIG. 1. The top view of a front waist area. The top view of a back waist area. (A) The perspective view seen from the back side which shows the state at the time of wearing the conventional diaper. (B) Typical sectional drawing which follows the VIIb-VIIb line. (A) The perspective view seen from the back side which shows the state at the time of wearing the diaper shown in FIG. (B) Typical sectional drawing which follows a VIIIb-VIIIb line. (A) The side view in the wearing condition of the conventional diaper. (B) The figure which shows a mode that the front waist area was slanted downward in the wearing condition of the conventional diaper. The side view in the wearing condition of a diaper. The figure which shows a mode that the front waist area was hanged down diagonally downward in the wearing condition of a diaper.

  The following embodiment relates to a pants-type wearing article shown in FIGS. 1 to 11 as an example of the present invention, and includes not only an indispensable structure of the invention but also a selective and preferable structure. In FIG. 2, each elastic body, which will be described later, resists the contraction force, and the gathers generated in the members to which the elastic bodies are attached by the contraction force in the horizontal direction X and the vertical direction Y are substantially reflected by natural vision. It has been stretched to such an extent that it seems to be lost.

  1 to 3, a disposable pant-type diaper 10 that is an example of a pant-type wearing article according to the present invention includes a vertical direction Y and a horizontal direction X that are orthogonal to each other, a skin facing surface, and the opposite side. It has a non-skin facing surface, a vertical axis P that bisects the length dimension in the horizontal direction X, and a horizontal axis Q that bisects the length dimension in the vertical direction Y. Yes, including a front waist region 11, a rear waist region 12, and a crotch region 13 located between the front waist region 11 and the rear waist region 12.

  The diaper 10 includes a chassis 14 having a base form. The chassis 14 includes a front end edge (front waist opening edge) 14a, a rear end edge (rear waist opening edge) 14b, and a crotch region 13 that face each other in the longitudinal direction Y. The demarcating center has concave side edges 14c and 14d. The narrowest portion of the crotch region 13 whose outer contour is formed by the side edges 14c and 14d is located on the front waist region 11 side with respect to the horizontal axis Q. The side edge portions 11a and 11b of the front waist region 11 and the side edge portions 12a and 12b of the rear waist region 12 are side surfaces in which side edge portions facing each other in the front-rear direction Z of the diaper 10 extend intermittently in the longitudinal direction Y. By being connected by a seam 22, a waist opening 23 and a pair of leg openings 24 are defined. In the side seam 22, the overlapping sheets are fused together by a known means such as embossing / debossing by heat or ultrasonic waves. In the manufacturing process of the diaper 10, the side seam 22 is formed in a straight line parallel to the side edges 11 a, 11 b, 12 a, 12 b and the longitudinal center line P of the front and rear waist regions 11, 12. However, in the diaper 10, due to the difference in contraction amount between the elastic regions where the waist elastic bodies positioned above the center portions in the vertical direction of the front and rear waist regions 11, 12 facing each other in the front-rear direction are disposed, The seam 22 is bent to the rear waist region 12 side.

  The chassis 14 is located on the skin facing surface, is located on the non-skin facing surface side, and is separated from each other in the longitudinal direction Y, with the base sheet 25 made of a fiber nonwoven fabric defining the front and rear waist regions 11 and 12 and the crotch region 13 in series. The front waist sheet 26 and the rear waist sheet 27 made of a nonwoven fabric are opposed to each other, and the liquid absorbing structure 15 is located on the skin facing surface side of the base sheet 25 and extends from the crotch region 13 to the front and rear waist regions 11 and 12. .

<Base sheet>
The base sheet 25 includes first and second end edges 25a and 25b that are spaced apart in the vertical direction Y, and both side edges 25c and 25d that are spaced apart in the horizontal direction X. Both side edges 25c and 25d are a straight portion in the front and rear waist regions 11 and 12, and a curved portion that protrudes deeper from the rear waist region 12 side toward the front waist region 11 side toward the vertical axis P in the crotch region 13. Formed from.

<Front waist seat>
The front waist seat 26 has a substantially trapezoidal shape that forms the front waist region 11 and a part of the crotch region 13, and extends in the longitudinal direction Y, with an intermediate inner edge 26 a and an outer edge 26 b extending in the lateral direction X. It is defined by both outer edges 26c, 26d and both inner edges 26e, 26f connecting both outer edges 26c, 26d and the intermediate inner edge 26a. The inner side edges 26e and 26f on both sides have a straight part extending straight from the outer edges 26c and 26d in the lateral direction X and a curved part extending from the straight part to the intermediate inner edge 26a. The front waist sheet 26 has a bent portion 33 that is bent inward along the waist opening edge. The bent portion 33 is bent inward along the first edge 25a of the base sheet 25 in a state where a liquid absorbing structure 15 described later is disposed on the inner surface of the base sheet 25, and the base sheet 25 and the liquid absorbing structure It is fixed to the skin facing surface of the body 15.

<Rear waist seat>
The rear waist sheet 27 has a substantially trapezoidal shape that forms the rear waist region 12 and a part of the crotch region 13, and extends from the intermediate inner edge 27a and the outer edge 27b extending in the lateral direction X, and from the outer edge 27b. It is defined by both outer edges 27c and 27d extending in the longitudinal direction Y, and both inner edges 27e and 27f that connect both outer edges 27c and 27d and the intermediate inner edge 27a in a curved shape. The rear waist sheet 27 has a bent portion 38 that is bent inward along the waist opening edge. The bent portion 38 is bent inward along the second end edge 25b of the base sheet 25 in a state where the liquid absorbing structure 15 is disposed on the inner surface of the base sheet 25, and the base sheet 25 and the liquid absorbing structure 15 are thus bent. Fixed to the skin facing surface.

  2 to 4, between the front waist sheet 26 and the base sheet 25, front waist elastic bodies 61 to 64 that extend in the lateral direction X in the front waist region 11 are attached so as to be contractable in an extended state. Between the rear waist sheet 27 and the base sheet 25, the rear waist elastic bodies 71 to 74 extending in the lateral direction X in the rear waist area 12, and the buttock extending in a curved shape from the rear waist area 12 to the crotch area 13 The elastic body 76 is attached in a stretched state so as to be contractible. The front and rear waist regions 11 and 12 have a front and rear waist elastic region that can be elastically expanded and contracted by disposing each elastic body.

The base sheet 25 and the front and rear waist sheets 26 and 27 have a mass per unit area of about 10 to 40 g / m ² and a fiber density of about 0.03 to 0.10 g / cm ^3. A fiber nonwoven fabric, an SMS (spunbond / meltblown / spunbond) fiber nonwoven fabric, an air-through fiber nonwoven fabric, a plastic sheet, or a laminate sheet thereof can be used. In the present embodiment, as the base sheet 25, the mass about 10~18g / ^{m 2,} preferably SMS fibrous nonwoven fabric of weight approximately 13 g / ^{m 2,} mass of about 15-25 g / ^{m 2} as a waist sheet 26 before and after, preferably Can use a spunbond fiber nonwoven fabric with a mass of about 20 g / m ² .

  Referring to a partially enlarged view of the outer surface of the rear waist region 12 shown in FIG. 1, in the present embodiment, the outer surface of the front and rear waist sheets 26 and 27 is optionally subjected to grid-like embossing and debossing, A checkered embossed pattern 28 is arranged. The embossed pattern 28 is formed by arranging a plurality of compression recesses, and extends inclining with respect to the vertical axis P and the horizontal axis Q, and intersects the first concave line 29A and the second concave line 29B. The In the compression recess, the thermoplastic resin of the fiber nonwoven fabric forming the front and rear waist sheets 26, 27 is heat-sealed, and the bulky and flexible non-woven fabric is between the first concave line 29A and the second concave line 29B. A compression section 30 is defined. Moreover, it is preferable that the front and rear waist sheets 26 and 27 have at least a fiber layer on the outer surface side having crimped fibers. In such a case, combined with the embossed pattern 28, the flexibility of the sheets is improved, and the appearance can be more like underwear. In the present embodiment, the central portion 13c of the crotch region 13 is formed only from the base sheet 25, but may be formed from a plurality of sheets.

  The diaper 10 is an adult diaper mainly used for the elderly, and the dimension L1 in the longitudinal direction Y of the diaper 10 is the same as the corresponding dimension of the diaper 10 (same as the corresponding dimension of the chassis 14). About 600 to 1000 mm, the dimension W1 in the lateral direction X is about 400 to 800 mm, the dimension L2 in the longitudinal direction Y of the front side edges 11a and 11b of the front waist region 11 (the length of the rear side edges 12a and 12b of the rear waist region 12) The same as the dimension in the direction Y) is about 200 to 250 mm.

<Liquid absorption structure>
Referring to FIGS. 2 and 3, the liquid absorbing structure 15 includes a front end edge 15 a and a rear end edge 15 b that are separated from each other in the vertical direction Y and extend in the horizontal direction X, and are separated from each other in the horizontal direction X in the vertical direction Y. And both side edges 15c. The liquid-absorbing structure 15 is located on the skin-facing surface side, and is a body-side liner 50 made of a fiber nonwoven fabric having liquid permeability, a liquid-absorbing liquid-absorbing core 51 having curved side edges, and a pair of A barrier cuff sheet 52 and a leak-proof sheet 53 are included.

  The liquid-absorbent core 51 has a front end edge 51a extending in the lateral direction X in the front waist region 11 and a rear end edge 51b extending in the lateral direction X in the rear waist region 12, for example, fluff pulp and absorbent It is formed from a mixture with polymer particles and the like, and the whole is covered with a liquid-absorbing and diffusing core wrap sheet such as tissue paper. The body side liner 50, the barrier cuff sheet 52, and the leak-proof sheet 53 extend from the front end edge 51 a and the rear end edge 51 b of the liquid absorbent core 51 to the outside in the vertical direction Y, respectively. The liquid absorbing structure 15 includes a front end portion 16A formed from those sheet members extending from the front end edge 51a of the liquid absorbent core 51 to the outside in the longitudinal direction Y, and a rear end edge 51b of the liquid absorbent core 51. And a rear end portion 16B formed from those sheet members extending outward in the longitudinal direction Y.

  The liquid absorbing structure 15 and the base sheet 25 are joined to each other via a joining area formed from a known joining means such as a hot melt adhesive applied to at least one of the facing surfaces. The joining area is composed of a plurality of joining parts arranged at a given distance from each other in the longitudinal direction Y, and a front part for fixing a part of the front end part 16A of the liquid absorbing structure 15 to the base sheet 25. The joining portion 59A, the rear joining portion 59B for fixing a part of the rear end portion 16B of the liquid absorbing structure 15 to the base sheet 25, and the central portion of the liquid absorbing structure 15 for fixing the base sheet 25. A central joint 59C.

  Referring to FIG. 2, the pair of barrier cuff sheets 52 are folded in two and the inner surfaces are fixed to each other, and are fixed to the skin facing surface of the body side liner 50 and are spaced apart from each other in the longitudinal direction Y. It has a front fixed portion and a rear fixed portion, a fixed side edge portion 52b extending in the vertical direction Y, and a free side edge portion 52a located inside the horizontal direction X from the fixed side edge portion 52b. A cuff elastic body 57 made of a string-like or strand-like elastic material and extending in the longitudinal direction Y is attached to the free side edge portion 52a of the barrier cuff sheet 52 so as to be contracted in an extended state. When the cuff elastic body 57 contracts, the free side edge portion 52a is separated from the body side liner 50 toward the wearer's body side, and a pair of leakage prevention cuffs for preventing side leakage of body fluid is formed. The leak-proof sheet 53 is formed from a liquid-impervious fiber nonwoven fabric, a liquid-impervious and moisture-permeable plastic film, or a laminate sheet thereof, and covers at least almost the entire lower surface of the liquid-absorbent core 51. It is arrange | positioned and it prevents that a bodily fluid leaks from the non-skin opposing surface (bottom surface) side of the liquid absorption structure 15. FIG.

<Front waist elastic area>
The front waist region 11 has front waist elastic regions 60A and 60B in which front waist elastic bodies 61 to 64 located between the front side edges 11a and 11b are arranged. For convenience of explanation, the front waist elastic regions 60A, 60B extend from the front waist opening edge 14a to the crotch region 13 side with respect to the front end edge 15a of the liquid absorbing structure 15, and are formed in a plurality of strings or strands extending in the lateral direction X Upper elastic region 60A in which upper front waist elastic bodies 61 and 62 are disposed, and a plurality of string-shaped or strand-shaped lower front waists located in the crotch region side of upper elastic region 60A and extending in the lateral direction X And a lower elastic region 60B in which the elastic bodies 63 and 64 are disposed. When the longitudinal direction Y dimension of the front edge portions 11a and 11b of the front waist region is about 200 to 250 mm, the longitudinal direction Y dimension of the upper elastic region 60A is 100 to 120 mm, and the longitudinal direction Y dimension of the lower elastic region B Is about 100-130 mm.

  The upper front waist elastic bodies 61, 62 are a first front waist elastic body 61 located on the front waist opening edge 14a side, and a second waist elastic body 62 located on the crotch region 13 side of the first front waist elastic body 61. The lower front waist elastic bodies 63, 64 have a third front waist elastic body 63 located on the front waist opening edge 14 a side and a fourth front located on the crotch region 13 side of the third front waist elastic body 63. A waist elastic body 64.

  The number, fineness, and pitch of each of the front waist elastic bodies 61-64 are appropriately adjusted according to the size of the diaper 10. In this embodiment, the first front waist elastic body 61 has a fineness of about 300-800 dtex, a pitch of about It is formed from an elastic material arranged in an extended state of 4 to 8 mm and about 2.2 to 2.4 times, and the second front waist elastic body 62 has a fineness of 300 to 800 dtex, a pitch of 6 to 12 mm, and about 2 It is formed from an elastic material arranged in a stretched state of 2 to 2.4 times, and the third front waist elastic body 63 has a fineness of 600 to 950 dtex, a pitch of 6 to 12 mm, and about 2.3 to 2.7. It is formed from an elastic material arranged in a stretched state, and the fourth front waist elastic body 64 has a fineness of 600 to 1200 dtex, a pitch of 6 to 12 mm, and about 2.3 to 2.7 times. It is formed of a resilient material disposed in the long state. In the present specification, the pitch (separation dimension) between adjacent front and rear waist elastic bodies refers to a vertical dimension in a non-existing region of an elastic body formed between elastic bodies in the vertical direction Y. Further, “the pitch is substantially the same” includes a difference due to a manufacturing error of about 0 to 3.0 mm.

<Rear waist elastic area>
The rear waist region 12 includes rear waist elastic regions 70A and 70B in which rear waist elastic bodies 71 to 74 located between the rear waist opening edge 14b and the rear end edge 51b of the liquid-absorbent core 51 are disposed. For convenience of explanation, the rear waist elastic regions 70A, 70B extend from the rear waist opening edge 14b to the crotch region 13 side with respect to the rear end edge 15b of the liquid absorbing structure 15, and are a plurality of strings or strands extending in the lateral direction X. Upper elastic region 70A in which the upper upper waist elastic bodies 71 and 72 are disposed, and a plurality of string-like or strand-like lower portions located on the crotch region 13 side with respect to the upper elastic region 70A and extending in the lateral direction X And a lower elastic region 70B in which the rear waist elastic bodies 73 and 74 are disposed. The upper elastic region 70A of the rear waist elastic regions 70A and 70B extends from the rear waist opening edge 14b to the crotch region 13 side than the rear end edge 15b of the liquid absorbing structure 15, and the lower elastic region 70B is an upper elastic region. It is located between 70 </ b> A and the rear end edge 51 b of the liquid absorbent core 51. When the dimension in the longitudinal direction Y of both side edges 12a and 12b of the rear waist region 12 is about 200 to 250 mm, the dimension in the longitudinal direction Y of the upper elastic region 70A is 70 to 100 mm, and the longitudinal direction Y of the lower elastic region 70B. The dimension is about 130-150 mm.

  The upper rear waist elastic bodies 71, 72 are a first rear waist elastic body 71 located on the rear waist opening edge 14 b side and a second rear waist elastic body 72 located on the crotch region 13 side of the first rear waist elastic body 71. The lower rear waist elastic bodies 73, 74 have a third rear waist elastic body 73 located on the rear waist opening 14 b side and a fourth rear located on the crotch region 13 side of the third rear waist elastic body 73. A waist elastic body 74.

  The number, fineness, and pitch of the rear waist elastic bodies 71-74 are appropriately adjusted according to the size of the diaper 10. In this embodiment, the first rear waist elastic body 71 has a fineness of about 300-800 dtex, and a pitch of about 4. It is formed from an elastic material arranged in an extended state of about 8 to 8 mm and about 2.2 to 2.4 times, and the second rear waist elastic body 72 has a fineness of 600 to 950 dtex, a pitch of 4 to 8 mm, and about 1. The third rear waist elastic body 73 is formed of an elastic material arranged in an expanded state of 8 to 2.2 times, and has a fineness of 600 to 950 dtex, a pitch of 4 to 8 mm, and about 2.3 to 2.7 times. The fourth rear waist elastic body 74 is stretched to a fineness of 600 to 1200 dtex, a pitch of 12 to 18 mm, and about 2.3 to 2.7 times. It is formed of a resilient material disposed in a state.

<Method for measuring elongation stress>
The elongation stress in the elastic region where each waist elastic body was arranged was measured using a tensile tester manufactured by Shimadzu Corporation. In the measurement, each elastic region was cut out from each of the front and rear waist regions 11 and 12 of the diaper 10 having a dimension W1 in the lateral direction X of 600 mm. First, with one end of the sample fixed to the upper chuck in the tensile test and the other end of the sample fixed to the lower chuck, they are separated by 180 mm (the size of the grip portion of the chuck is about 15 mm). Next, the lower chuck is moved at a speed of 100 mm / min, separated until the distance between the chucks reaches 460 mm, the movement is reversed, and the movement is reversed until the distance between the chucks reaches 180 mm. The elongation stress (N) at the time of separation until reaching 460 mm was measured.

  As a result of the above measurement, the extension stress in the upper elastic regions 60A and 60B of the front waist elastic body is about 1.1 N, the extension stress in the lower elastic region 60B is about 2.0 N, and the rear waist elastic regions 70A and 70B. The tensile stress of the upper elastic region 70A was about 1.3N, and the tensile stress of the lower elastic region 70B was about 2.9N. Therefore, the correlation between the elongation stresses of these elastic regions was: upper elastic region 60A <lower elastic region 60B, upper elastic region 70A <lower elastic region 70B. The elastic region in which the second front waist elastic body 62 is arranged has an extensional stress of about 0.98 N, and has the lowest extensional stress among the front waist elastic regions 60A and 60B. 4 The elastic region where the rear waist elastic body 74 is disposed has an elongation stress of about 1.98 N, and has the highest tensile stress among the rear waist elastic regions 70A and 70B. Further, the extension stress in the elastic region where the first rear waist elastic body 71 is arranged and the extension stress in the elastic region where the second rear waist elastic body 72 is arranged are about 1.3 N, which are substantially the same. It was. Further, from the above results, the extension stress in the elastic region where the second rear waist elastic body 72 is arranged is higher than the extension stress in the elastic region where the second front waist elastic body 62 is arranged.

  Referring to FIGS. 2 and 6, the chassis 14 has a buttocks elastic region extending from the rear waist region 12 to the crotch region 13. In the collar elastic region, a plurality of collar elastic bodies 76 extending in a curved shape toward the horizontal axis Q are attached so as to be contracted in an extended state. The buttocks elastic body 76 can be formed from a plurality of string-like or strand-like elastic materials having a fineness of about 600 to 950 dtex and an extension ratio of about 1.0 to 2.5. In the rear waist region 12, a buttock cover portion formed only from the sheet member is defined between the fourth rear waist elastic body 74, the buttock elastic body 76, and the side edge 15 c of the liquid absorbing structure 15. Since the buttock cover portion is formed only from the sheet member, the buttock cover portion has flexibility and has a size enough to cover the wearer's buttock in a wide range.

  As described above, in the front and rear waist regions 11 and 12, the extension stresses of the upper elastic regions 60A and 70A are lower than those of the lower elastic regions 60B and 70B, respectively. As described above, since the elongation stress of the upper elastic regions 60A and 70A located on the side of the waist opening 23 is relatively small, even the elderly with weak grip strength can easily expand the waist opening 23 at the time of wearing. The wearing operation becomes easier as compared with the case where the elongation stress of the is high. On the other hand, since the lower elastic regions 60B and 70B have a relatively high elongation stress, the lower elastic regions 60B and 70B can be stably fitted to the wearer's body in the portion and can exhibit a required holding force (hold) force on the body. Thus, in the up-down direction of the diaper 10, a region of low elongation stress and a region of high elongation stress are formed and opposed in the front-rear direction Z, so that operability at the time of wearing and fit to the body are improved. Both can be achieved.

  7A and 7B, in the conventional diaper 110, the rear waist region 112 uses the same string-like or strand-like elastic material as the rear waist elastic body, and the upper rear waist. Of the elastic bodies 171, 172, the first rear waist elastic body 171 and the second rear waist elastic body 172 have different pitch dimensions, and the pitch of the second rear waist elastic body 172 is that of the first waist elastic body 171. Is bigger than. In the diaper 110 of the comparative example having such a configuration, when the diaper 110 is pulled up to the collar portion 78 when worn, the difference in rigidity between the region where the liquid absorbing structure 15 is present and the region located outside in the longitudinal direction Y is more than that. In addition, the vicinity of the rear end edge 115b of the liquid absorbing structure 115, that is, the upper elastic region 170A is bent due to the pitch difference between the first rear waist elastic body 171 and the second rear waist elastic body 172 and the difference in elongation stress. It is caught in the step 79 between the thigh and the buttocks 78, and the lifting operation cannot be performed smoothly. In particular, in the diaper 110, since the rear end edge 115b of the liquid absorbing structure 115 is relatively close to the waist opening, the most part of the diaper 110 is not pulled up by being caught, and the diaper 110 is forcibly pulled up. If it tries to do so, a part of the diaper 110 may be broken, or a part of the crotch region 113 may bite into the groin.

  Referring to FIGS. 8A and 8B, in the diaper 10 according to the present embodiment, the pitch sizes of the first rear waist elastic body 71 and the second rear waist elastic body 72 are the same. The upper elastic region 70A is generally fitted to the body in a planar shape, and the extension stress in the elastic region where the first and second rear waist elastic bodies 71 and 72 are arranged is the same, so that the liquid absorbing structure The vicinity of the rear end edge 15b of the body 15 is not bent and caught on the step 79, and the lifting operation can be performed smoothly. In the present embodiment, the pitch of the third rear waist elastic body 73 of the lower rear waist elastic bodies 73 and 74 is substantially the same as the pitch of the first and second rear waist elastic bodies 71 and 72. Therefore, the pitch of each elastic body becomes substantially the same in a given dimension on the inner side and the outer side in the longitudinal direction Y of the rear end edge 15b of the liquid-absorbing structure 15, and the bending at the time of wearing in the portion is further suppressed. sell.

  Moreover, the separation dimension of the fourth rear waist elastic body 74 among the lower rear waist elastic bodies 73 and 74 is larger than the dimensions of the first to third rear waist elastic bodies 71 to 73. The fourth rear waist elastic body 74 overlaps with the rear end portion 16B of the liquid absorbing structure 15 in a plan view, but does not overlap with a portion where the rigidity changes. When you pull up, it will not bend and get caught in a step.

  Referring to FIG. 4, the rear end portion 16B of the liquid absorbing structure 15 is attached to the inner surface of the chassis 14 via the rear joint portion 59B in the elastic region where the third rear waist elastic body 73 is disposed. A portion located between the rear end edge 51 b of the liquid core 51 and the rear joint portion 59 </ b> B is not fixed to the inner surface of the chassis 14. As described above, since the entire rear end portion 16B is not attached to the chassis 14, the chassis 14 is hardly affected by a change in rigidity due to the attachment of the liquid absorbing structure 15, and the waist opening 23 can be easily widened when worn. .

  Referring to FIG. 6, the separation dimension R in the longitudinal direction Y between the rear end edge 51 b of the liquid-absorbent core 51 and the elastic body located closest to the crotch region 13 among the fourth rear waist elastic bodies 74 is adjacent. The distance between the fourth rear waist elastic bodies 74 in the longitudinal direction Y is substantially equal to or slightly larger than that. The vicinity of the rear end edge 51b of the semi-rigid liquid-absorbent core 51 is also a portion in which the rigidity is easily changed, and the difference between the separation dimension R in the longitudinal direction Y and the separation dimension R of the fourth rear waist elastic body 74 is relatively small. If it is large, when the diaper 10 is pulled up, it may be bent at the separated portion and caught on a step. In the present embodiment, the separation dimension in the longitudinal direction Y of the fourth rear waist elastic body 74 and the separation dimension R are substantially equal to or slightly larger than that, so that the liquid-absorbing core 51 is pulled up when the diaper 10 is pulled up. The wearing operation can be performed smoothly without the vicinity of the rear edge 51b being bent.

  A checkered embossed pattern 28 defined by a plurality of first and second concave lines 29A and 29B is disposed on the outer surfaces of the front and rear waist sheets 26 and 27 forming the outer surfaces of the front and rear waist regions 11 and 12. Combined with the gathers generated by the contraction action of the waist elastic body, various kinds of gathers are formed. Therefore, it is easier to grip the front and rear waist regions 11 and 12 than when the outer surfaces of the front and rear waist regions 11 and 12 are smooth surfaces, especially when the rear waist region 12 of the diaper 10 is gripped and pulled up when worn. It becomes easy to pull up by adapting to the hand of the wearer / wear assistant. Moreover, when the fiber layer on the outer surface side of the front and rear waist sheets 26 and 27 includes crimped fibers, the bulkiness of the non-compressed portion 30 is improved, and the wearer or the like feels more familiar with the hand. be able to.

  The longitudinal dimension Y of the first to fourth rear waist elastic bodies 71 to 74 of the rear waist region 12 is different from each other, but in any elastic body, the separation dimension is about 11 mm or less. As described above, since the plurality of elastic bodies are arranged with a relatively small separation dimension, the entire rear end portion 16B of the liquid absorbing structure 15 overlapping with the elastic body 15 in a plan view can be fitted to the body. Further, it is possible to suppress bending at a separation portion between the waist elastic bodies during the wearing operation.

  9 (a) and 9 (b), the conventional diaper 200 extends in the vertical direction H in a worn state, is parallel to a longitudinal center line that bisects its lateral dimension, and is side seam 222. Imaginary line 280 passing through the vertex 220. In the conventional diaper 200, in a worn state, side seams 222 that connect both side edges of the front and rear waist regions 211 and 212 extend linearly in the vertical direction H along the virtual line 280. In such a wearing state, for example, in order to dispose a separate absorbent pad inside the diaper 200, the wear assistant grips the front waist region 211 and pulls it diagonally downward to widen the waist opening 223. A force F to be pulled downward acts on the entire side seam 222 extending along the imaginary line 280. For this reason, the entire rear waist region 212 is pulled obliquely forward and tilted and shifted downward, so that the rear waist opening edge is shifted downward from the virtual line 283 indicating a predetermined appropriate position. Therefore, when it is worn as it is, not only the feeling of wearing is impaired, but also excrement may be leaked. In addition, when the position of the rear waist region 212 is corrected after the absorbent pad is inserted and arranged inside the diaper 200 from the front waist region 211 side, the rear waist region 212 is set in a predetermined manner while adjusting the position of the absorbent pad. It is necessary to pull up to the virtual line 283, which takes time.

  Referring to FIG. 10, the diaper 10 according to the present embodiment extends in the vertical direction H, is parallel to the longitudinal center line P that bisects the lateral dimension thereof, and passes through the apex 20 of the side seam 22. It has a virtual line 80. The side seams 22 that connect the side edge portions 11b and 12b of the front and rear waist regions 11 and 12 extend in a straight line so as to be parallel to the virtual line 80 at the time of manufacture. 80 has a shape bent toward the rear waist region 12 side. Specifically, the side seam 22 is a first portion 22A that extends downward from the vertex 20 in a downward gradient, and a first portion 22A that is bent from the first portion 22A and extends forward in a downward gradient, and intersects the virtual line 80 at an intersection 84. Two portions 22B.

  Referring to FIG. 11, in order to dispose a separate absorbent pad inside the diaper 10, when the wearer grasps the front waist region 11 and pulls it diagonally downward to widen the waist opening 23, the front waist A force F that pulls the region 11 diagonally downward acts on the side seam 22. At this time, since the side seam 22 has a bent shape with respect to the virtual line 80, the pulling force F acts on the first portion 22A located above the bent portion 81 as a starting point, and the rear waist A portion of the region 12 on the side of the waist opening 23 is pulled obliquely forward. On the other hand, the second portion 22B located below the bent portion 81 is not or hardly affected by the force F to be pulled, and is not pulled down greatly by being pulled diagonally forward. Accordingly, since the entire rear waist region 12 is not pulled obliquely forward, at least the central portion of the rear waist region 12 is located on a virtual line 83 indicating an appropriate position. In addition, the pulling force F acting on the first portion 22A of the side seam 22 is dispersed in the buffer region 85 defined between the virtual line 80 and the first portion 22A, so that the rear waist region 12 is pulled down. It is thought that this can be suppressed.

  In the diaper 10 according to the present embodiment, in the front-rear direction Z of the diaper 10, an elastic region in which the second rear waist elastic body 72 of the rear waist elastic region is disposed and an elastic region in which the second front waist elastic body 62 is disposed. Are located opposite to each other, and the former has a higher tensile stress than that of the latter, so that the side seam 22 is pulled toward the rear waist region 12 in the portion and bent with respect to the virtual line 80. Make. Since the side seam 22 has such a configuration, the difference between the extension stress in the elastic region where the third rear waist elastic body 73 is arranged and the extension stress in the elastic region where the second front waist elastic body 62 is arranged is about 0. .2N or more is preferable.

  Moreover, in the front waist elastic region located in the lower part of the 2nd part 22B of the side seam 22, the 3rd front waist elastic body 63 is arrange | positioned. An elastic body 73 is disposed. In the present embodiment, the separation dimension in the longitudinal direction Y of the third front waist elastic bodies 63 adjacent to each other is smaller than the separation dimension in the longitudinal direction Y of the fourth rear waist elastic bodies 74 adjacent to each other. Accordingly, the extension stress of the front waist elastic region becomes higher than that of the rear waist elastic region in the lower portion, and the rear waist region 12 is pulled forward, so that the second portion 22B is gradually separated from the imaginary line 80 from the bent portion 81. So as to extend downhill.

  As long as the bent portion 81 is positioned behind the imaginary line 80, the side seam 22 may extend linearly from the apex 20 along the imaginary line 80, and then may extend downwardly downward. The intersection angle and the degree of gradient between the first and second portions 22A and 22B and the virtual line 80 can be changed as appropriate. Further, when the front waist region 11 is lowered obliquely downward, the region positioned above the bent portion 81 is pulled down. Therefore, when the bent portion 81 is positioned relatively below, it is lowered by the pulling force F. The portion of the waist region 12 after the heel down is increased. Therefore, the bent portion 81 of the side seam 22 is larger than the central portion 11c of the size in the longitudinal direction Y of the rear waist region 12 (for convenience of explanation, the portion where the central portion is located is indicated by a point positioned on the virtual line 80). It is preferable to be located above. As described above, the bent portion 81 is positioned above the central portion 11c, so that the rear waist region 12 as a whole can be prevented from sliding downward. Further, the end edge (outer end edge 27 b) of the bent portion 38 of the rear waist sheet 27 is positioned at the bent portion 81 of the side seam 22. Since the rigidity changes depending on the number of sheet members stacked in the rear waist region 12, it can be said that the side seam 22 is easily bent due to the change in rigidity in the vicinity of the end edge (outer end edge 27b). Further, since the embossed pattern 28 in the checkered pattern is arranged in the front and rear waist regions 11 and 12, the flexibility of the sheet member is increased, and the sheet member is easily deformed by the stretching force of the waist elastic body, so that the side seam is further improved. 22 becomes easy to bend.

  As described above, in the diaper 10 according to the present embodiment, the side seam 22 extends linearly in parallel with the longitudinal center line P and the virtual line 80 at the time of manufacture, but the front and rear waist elastic regions 60A, 60B, The product has a shape bent with respect to the imaginary line 80 by making the extension stress in each elastic region of 70A and 70B different depending on the conditions of the fineness, pitch, and extension magnification of the waist elastic body, While preventing the position shift of the back waist region 12 at the time of the wearing state of the diaper 10 and the insertion operation of an absorption pad, smooth wearing operation can be performed.

  In addition to the materials described in the specification, various known materials that are usually used in this type of article can be used without limitation for each component member constituting the diaper 10 according to the present invention. In the specification and claims, the terms “first”, “second”, “third”, and “fourth” are used to simply distinguish similar elements, positions, and the like.

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

  A longitudinal direction and a transverse direction perpendicular thereto, a vertical direction in the wearing state and a longitudinal direction perpendicular thereto; a longitudinal center line that bisects the transverse dimension; a skin facing surface; In a pants-type wearing article including a skin facing surface, a front waist region, a rear waist region, a side seam connecting both side edges of the front and rear waist region, a waist opening and a pair of leg openings, the longitudinal center A first imaginary line extending parallel to the line and passing through a vertex located at an edge of the waist opening of the side seam, wherein the side seam extends downwardly from the vertex downwardly; And a second portion that bends from the first portion and extends forward in a downward gradient and intersects the imaginary line.

The present invention disclosed in the above paragraph 0053 can include at least the following embodiments.
(1) The bent portion of the side seam is located above the central portion in the longitudinal dimension of the rear waist region.
(2) The front waist region has a front waist elastic region in which a plurality of front waist elastic bodies extending in the lateral direction are arranged, and the rear waist region is a plurality of rear waist elastics extending in the lateral direction. The body has a rear waist elastic region where the body seam is disposed, and in the bent portion of the side seam, the extension stress of the rear waist elastic region opposed in the front-rear direction is higher than the extension stress of the front waist elastic region.
(3) In the lower portion of the second portion of the side seam, the separation dimension in the longitudinal direction of the front waist elastic bodies adjacent to each other is larger than the separation dimension in the longitudinal direction of the rear waist elastic bodies adjacent to each other. small.
(4) The upper and lower rear waist elastic body is interposed between an inner sheet positioned on the skin facing surface side and an outer sheet positioned on the non-skin facing surface side, and the outer sheet is A bent portion that is bent inward in the longitudinal direction along the rear end edge of the inner surface sheet is provided, and the end edge of the bent portion is located at a bent portion of the side seam.
(5) A plurality of compression recesses are arranged on the outer surface of the front and rear waist regions, and a checkered emboss pattern composed of a first concave line and a second concave line intersecting each other is arranged.
(6) The longitudinal spacing of the rear waist elastic bodies adjacent to each other is 11 mm or less.

10 Diapers (pants-type wearing items)
DESCRIPTION OF SYMBOLS 11 Front waist area 11a, 11b Side edge part 11c of front waist area The center part 12 of the dimension of the vertical direction of a front waist area Rear waist area 12a, 12b Side edge part 13 of a rear waist area Crotch area 14 Chassis 15 Liquid absorption structure 16A Rear end portion 20 of liquid-absorbing structure 22 Seam apex 22 Side seam 22A First part of side seam 22B Second part of side seam 23 Waist opening 24 Leg opening 25 Base sheet (inner surface sheet)
27 Rear waist seat (outer seat)
28 Embossed pattern 29A First concave line 29B Second concave line 38 Bent part 62 Second front waist elastic body 64 Fourth front waist elastic body 70A Upper elastic area 70B of the rear waist elastic area Lower elastic area 71 of the rear waist elastic area First rear waist elastic body 72 Second rear waist elastic body 73 Third rear waist elastic body 74 Fourth rear waist elastic body 80 Virtual line 81 Bending portion 84 Intersection point of side seam and virtual line H Vertical direction P Vertical center line X Horizontal direction Y Vertical direction Z Front-back direction

Claims (5)

A vertical center line that has a vertical direction and a horizontal direction orthogonal thereto, a vertical direction in a worn state and a front-rear direction orthogonal thereto, and bisects the horizontal dimension;
A chassis having a skin facing surface and a non-skin facing surface on the opposite side, a front waist region, a rear waist region, a crotch region located between the front and rear waist regions, and a liquid absorbing structure attached to the chassis In a pants-type wearing article including a side seam that connects both side edges of the front and rear waist regions, and a waist opening and a pair of leg openings,
And further includes an imaginary line extending parallel to the longitudinal center line and passing through a vertex located at an edge of the waist opening of the side seam,
The side seam has a first part extending downward from the apex to a downward slope, and a second part bent from the first part and extending forward to a downward slope and intersecting the virtual line ,
The front waist region has a front waist elastic region in which a plurality of front waist elastic bodies extending in the lateral direction are arranged, and the rear waist region is arranged with a plurality of rear waist elastic bodies extending in the lateral direction. The rear waist elastic region, and in the bent portion of the side seam, the extension stress of the rear waist elastic region facing in the front-rear direction is higher than the extension stress of the front waist elastic region,
In the lower part of the second part of the side seam, the separation dimension in the longitudinal direction of the front waist elastic bodies adjacent to each other is smaller than the separation dimension in the longitudinal direction of the rear waist elastic bodies adjacent to each other. Said wearing article.   The wearing article according to claim 1, wherein the bent portion of the side seam is positioned above a central portion in the longitudinal dimension of the rear waist region. The rear waist elastic body is interposed between an inner sheet positioned on the skin facing surface side and an outer sheet positioned on the non-skin facing surface side, and the outer sheet is a rear end of the inner sheet. along the edges has a bent portion that is bent inwardly of the longitudinal direction, wearing article according to claim 1 or 2 edges of the bent portion is located at the bent portion of the side seams. Wherein the outer surface of the front and rear waist regions, a plurality of compressed recesses are arranged, and claims 1-3 lattice stripes shaped embossed pattern made up of a first concave line and the second concave line crossing each other are disposed The wearing article in any one of. The wearing article according to any one of claims 1 to 4 , wherein the longitudinal separation distance of the rear waist elastic bodies adjacent to each other is 11 mm or less.