WO2016021217A1

WO2016021217A1 - Pull-on wearable article

Info

Publication number: WO2016021217A1
Application number: PCT/JP2015/055094
Authority: WO
Inventors: 祐介川上; 史絵青山
Original assignee: ユニ・チャーム株式会社
Priority date: 2014-08-05
Filing date: 2015-02-23
Publication date: 2016-02-11
Also published as: JP5766855B1; CN106572934B; JP2016036396A; CN106572934A

Abstract

Provided is a pull-on wearable article which is an improvement over the prior art and is not susceptible to the rear waist region thereof being positionally displaced when the front waist region thereof is pulled down. The pull-on wearable article further has imaginary lines extending parallel to a longitudinal centerline (P) and running through side seam (22) vertices (20) which are positioned at the edge of a waist opening (23), and each side seam (22) comprises: a first portion(22A) which extends downward and backward from the respective vertex (20); and a second portion (22B) which bends and extends downward and forward from the respective first portion (22A) and intersects with the respective imaginary line (80).

Description

Wear items of pull-on

The present invention relates to a pull-on wearing article.

Conventionally, a pull-on wearing article is known which has side seams connecting the side edges of the front waist region and the side edges of the rear waist region to each other. For example, Patent Document 1 discloses a pull-on wearing article in which side seams extend linearly in the vertical direction.

JP 2009-131539 A (P2009-131539A)

In the wearing article disclosed in Patent Document 1, the side seams are formed of a plurality of welds arranged in a line in the vertical direction and at predetermined intervals, and the welds are relatively formed. Since the side seam has a narrow width, when peeling off the side seam from one end in the vertical direction to the other end, the peeling force can be concentrated on the welded portion and can be easily peeled off.

However, since the side seams have a shape extending linearly in the vertical direction, for example, in the wearing state, the wearing assistant grips the front waist region in order to place a separate absorbent pad on the wearing article. Then, in the case of widening the waist opening by pulling it downward obliquely, a force acting to pull it diagonally forward acts on the entire side seam, so that the rear waist region is entirely lowered downward. Therefore, when worn as it is, it may not only impair the feeling of wearing but also cause leakage of excrement. In addition, in the case of correcting the position of the rear waist area, after arranging the absorbent pad, it is necessary to adjust so that the absorbent pad is not misaligned while raising the rear waist area to an appropriate position, which takes time and effort .

The object of the present invention is an improvement of the prior art, and is to provide a pull-on wearing article in which the rear waist area is not likely to be dislocated even when the front waist area is lowered in the wearing state.

The present invention for achieving the above object has a longitudinal direction and a lateral direction perpendicular thereto, and a vertical center line which has the vertical direction in the wearing state and the longitudinal direction orthogonal thereto and which divides the lateral dimension into two equal parts. And a non-skin facing surface opposite to the skin facing surface, a front waist region, a rear waist region, and a chassis having a crotch region located between the front and back waist regions; An object of the present invention is to improve a pull-on wearing article including a structure, side seams connecting both side edges of the front and rear waist area, and a waist opening and a pair of leg openings.

The wearing article according to the first invention of the present invention further has an imaginary line extending parallel to the longitudinal center line and passing through an apex located at an edge of the waist opening of the side seam, the side seam And a second portion extending downward from the first portion and extending forward and descending from the first portion and intersecting the imaginary line.

In the wearing article according to the second aspect of the present invention, the rear waist elastic region is positioned in the rear waist region, and the liquid absorbent structure has a rear end edge. And a rear end portion extending outward in the longitudinal direction from the rear end edge of the liquid absorbent core, and the rear waist elastic region is closer to the rear end edge of the liquid absorbent structure from the waist opening. An upper elastic region in which the plurality of upper rear waist elastics extending in the crotch region extend in the crotch region side and the upper elastic region are disposed on the crotch region side and extend in the lateral direction And a lower elastic region in which the lower elastic waist body is disposed, the extension elastic stress of the upper elastic region is lower than the expansion elastic stress of the lower elastic region, and the upper rear elastic waist members are substantially equally spaced. Are disposed in the longitudinal direction and adjacent to each other. Said longitudinal separation dimension of the waist elastic member located in the waist-opening side in the lower rear waist elastic member, characterized in that the said longitudinal separation dimension of the elastic member adjacent to each other are the same.

In the pull-on wearing article according to the present invention, the side seam has the first portion extending downward from the top thereof and the second portion bent downward from the first portion and extending downward. When the front waist region is pulled diagonally downward and the waist opening is expanded, the first portion is pulled diagonally forward and slips downward while the second portion is not affected or hardly subjected to a pulling force, the rear The entire waist area does not slide down significantly.

The drawings illustrate certain embodiments of the present invention according to the present disclosure and include not only the essential features of the invention, but also optional and preferred embodiments.
The perspective view which looked at the disposable diaper seen from the back side shown as an example of the wearing article of the pull-on concerning this indication. The partially broken development top view of the diaper extended longitudinally and laterally to the time of maximum expansion of each elastic body (The extent to which the gather by the contraction effect of an elastic body is lose | eliminated). The partially broken exploded perspective view of a diaper. FIG. 2 is a schematic cross-sectional view taken along the line IV-IV in FIG. Top view of the front waist area. Top view of the rear waist region. (A) The perspective view seen from the back side which shows the state at the time of wearing the conventional diaper. (B) A schematic cross-sectional view along the line VIIb-VIIb. (A) The perspective view seen from the back side which shows the state at the time of wearing the diaper shown in FIG. (B) A schematic sectional view taken along the line VIIIb-VIIIb. (A) Side view in the wearing state of the conventional diaper. (B) The figure which shows a mode that the front waist area was sloping downward diagonally 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 sloping downward diagonally in the wearing condition of a diaper.

The following embodiment relates to the pull-on wearing article shown in FIGS. 1 to 11 which is an example of the present invention, and includes not only the essential constitution of the invention but also selective and preferable constitutions. In FIG. 2, each elastic body described later resists its contraction force and gathers in a member to which each elastic body is attached by the contraction force in the transverse direction X and the longitudinal direction Y is substantially obtained by natural vision. It has been stretched to the extent that it appears to be lost.

With reference to FIGS. 1 to 3, a disposable pull-on diaper 10, which is an example of a pull-on wearing article according to the present invention, has a longitudinal direction Y and a transverse direction X orthogonal to one another, It has an opposing surface, a longitudinal axis P which bisects the length dimension of the lateral direction X, and a transverse axis Q which bisects the longitudinal dimension of the longitudinal direction Y, and is substantially symmetrical with respect to the longitudinal axis P, It includes 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 in the form of a base, and the chassis 14 has a front end edge (front waist opening edge) 14a and a rear end edge (rear waist opening edge) 14b opposed in the longitudinal direction Y and a crotch area 13 The defining central portion has

concave side edges

14c and 14d. The narrowest portion of the crotch region 13 whose outer contour is formed by the

side edges

14 c and 14 d is located closer to the front waist region 11 than the horizontal axis Q. The

side edges

11a and 11b of the front waist region 11 and the

side edges

12a and 12b of the rear waist region 12 are side edges of the diaper 10 in the longitudinal direction Z which are opposed to each other in the longitudinal direction Z Connected by the seam 22 defines a waist opening 23 and a pair of leg openings 24. The side seams 22 fuse the mutually overlapping sheets by known means such as, for example, heat or ultrasonic embossing / debossing. The side seams 22 are formed in a straight line parallel to the

side edges

11 a, 11 b, 12 a, 12 b of the front and

rear waist regions

11, 12 and the longitudinal center line P in the manufacturing process of the diaper 10. However, in the diaper 10, the difference in the amount of contraction between the elastic areas in which the waist elastics located above the vertical central portions of the front and

rear waist areas

11 and 12 face each other in the front and rear direction are arranged. The seam 22 has a shape bent to the rear waist region 12 side.

The chassis 14 is a non-woven fabric base sheet 25 located on the skin facing surface and defining the front and

rear waist areas

11 and 12 and the crotch area 13 in series, and located on the non-skin facing surface side and separated from each other in the longitudinal direction Y It includes opposing front waist sheet 26 and rear waist sheet 27 made of fiber non-woven fabric, and absorbent structure 15 located on the skin facing side of base sheet 25 and extending from crotch region 13 to front and

rear waist regions

11 and 12 .

<Base sheet>
The base sheet 25 has first and

second end edges

25a, 25b spaced apart in the longitudinal direction Y, and

opposite side edges

25c, 25d spaced apart in the lateral direction X. Both

side edges

25c, 25d are straight portions in the front and

rear waist regions

11, 12 and a curved portion in the crotch region 13 that is convexly bent deeper toward the front waist region 11 from the rear waist region 12 side toward the vertical axis P It is formed from

<Front waist seat>
The front waist sheet 26 has a substantially trapezoidal shape forming the front waist region 11 and a part of the crotch region 13 and extends in the longitudinal direction Y with the middle inner end edge 26 a and the outer end edge 26 b extending in the lateral direction X. It is defined from both

outer edges

26c, 26d and both

inner edges

26e, 26f connecting the

outer edges

26c, 26d and the middle inner edge 26a. The both

inner end edges

26e, 26f have a straight portion extending straight in the lateral direction X from the

outer edges

26c, 26d, and a curved portion extending from the straight portion to the middle inner end 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 25 a of the base sheet 25 in a state where the liquid absorbent structure 15 described later is disposed on the inner surface of the base sheet 25, and the base sheet 25 and the liquid absorbent 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 area 12 and a part of the crotch area 13, and extends from the middle inner edge 27a and the outer edge 27b extending in the lateral direction X, and the outer edge 27b. It is defined from both

outer edges

27c, 27d extending in the longitudinal direction Y, and both

inner edges

27e, 27f connecting the

outer edges

27c, 27d and the middle inner edge 27a in a curved manner. 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 edge 25 b of the base sheet 25 with the liquid absorbent structure 15 disposed on the inner surface of the base sheet 25, and the base sheet 25 and the liquid absorbent structure 15 It is fixed on the skin facing side of

With reference to FIGS. 2 to 4, front waist elastics 61 to 64 extending in the lateral direction X in the front waist region 11 are attached between the front waist sheet 26 and the base sheet 25 in an expandable state so as to be contractible. Between the rear waist sheet 27 and the base sheet 25, rear elastic waist bodies 71 to 74 extending in the lateral direction X in the rear waist area 12 and ridges extending in a curved shape from the rear waist area 12 to the crotch area 13 The elastic body 76 is attached to be contractible in an extended state. The front and

rear waist regions

11 and 12 have elastically stretchable front and rear waist elastic regions described later by arranging the respective elastic bodies.

The base sheet 25 and the front and

rear waist sheets

26 and 27 have a weight 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 , for example, a spunbond A fiber non-woven fabric, an SMS (spunbond, meltblown, spunbond) fiber non-woven fabric, an air through fiber non-woven fabric, a plastic sheet, or a laminate sheet thereof can be used. In this embodiment, an SMS fiber non-woven fabric having a mass of about 10 to 18 g / m ² , preferably about 13 g / m ² as the base sheet 25, and a mass of about 15 to 25 g / m ² , preferably, the front and

rear waist sheets

26 and 27. Can use a spunbond fiber non-woven fabric having a mass of about 20 g / m ² .

Referring to the partially enlarged view of the outer surface of the rear waist area 12 shown in FIG. 1, in the present embodiment, the outer surfaces of the front and

rear waist sheets

26 and 27 are optionally subjected to a grid-like embossing / debossing process, A plaid embossed pattern 28 is placed. Embossing pattern 28 is formed by intersecting a first concave line 29A and a second concave line 29B extending obliquely with respect to longitudinal axis P and transverse axis Q, in which a plurality of compression recesses are arranged. Ru. In the compression recess, the thermoplastic resin of the fiber non-woven fabric forming the front and

rear waist sheets

26 and 27 is heat-sealed, and between the first concave line 29A and the second concave line 29B A compression unit 30 is defined. Further, it is preferable that the front and

rear waist sheets

26 and 27 have at least the fiber layer on the outer surface side have crimped fibers. In such a case, the emboss pattern 28 in combination improves the flexibility of the sheet and can have a more underwear-like appearance. In the present embodiment, the central portion 13 c of the crotch area 13 is formed only of the base sheet 25, but may be formed of a plurality of sheets.

The diaper 10 is a diaper for adults mainly used for elderly people etc., and speaking about each dimension (the same as the corresponding dimension of the chassis 14) of the diaper 10, the dimension L1 in the longitudinal direction Y of the diaper 10 is Approximately 600 to 1000 mm, dimension W1 in the lateral direction X is approximately 400 to 800 mm, dimension L2 in the longitudinal direction Y of the

front edge

11a, 11b of the front waist region 11 (longitudinal edge of the

rear edge

12a, 12b of the rear waist region 12 The same as the dimension in the direction Y) is about 200 to 250 mm.

<Liquid-absorbent structure>
Referring to FIGS. 2 and 3, the liquid absorbing structure 15 has a front end edge 15 a and a rear end edge 15 b extending in the lateral direction X, spaced apart in the longitudinal direction Y, and spaced apart in the lateral direction X And both side edges 15c extending to The liquid-absorbent structure 15 is located on the skin-facing surface side, and a body-side liner 50 made of a liquid-permeable fibrous non-woven fabric, a liquid-absorbent liquid-absorbent core 51 having curved side edges, and a pair A barrier cuff sheet 52 and a leakproof sheet 53 are included.

The 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; It is formed of 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 leakproof sheet 53 extend outward in the longitudinal direction Y from the front end edge 51a and the rear end edge 51b of the liquid absorbent core 51, respectively. The liquid-absorbent structure 15 includes a front end portion 16A formed of those sheet members extending outward from the front end edge 51a of the liquid-absorbent core 51 in the longitudinal direction Y and a rear-end edge 51b of the liquid-absorbent core 51. And a rear end portion 16B formed of those sheet members extending outward in the longitudinal direction Y.

The liquid absorbent structure 15 and the base sheet 25 are bonded to each other through a bonding area formed of a known bonding means such as a hot melt adhesive applied to at least one of the opposing surfaces thereof. The bonding area is composed of a plurality of bonding parts which are disposed apart from each other by given dimensions in the longitudinal direction Y, and the front for fixing a part of the front end 16A of the liquid absorbing structure 15 to the base sheet 25. A joint portion 59A, a rear joint portion 59B for fixing a part of the rear end portion 16B of the liquid absorbing structure 15 to the base sheet 25, and a center portion of the liquid absorbing structure 15 to the base sheet 25. And a central junction 59C.

Referring to FIG. 2, the pair of barrier cuff sheets 52 are folded in two and the inner surfaces thereof are fixed to each other and fixed to the skin-facing surface of the body side liner 50 and facing apart in the longitudinal direction Y It has a front fixed portion and a rear fixed portion, a fixed side edge 52b extending in the longitudinal direction Y, and a free side edge 52a positioned on the inner side in the lateral direction X from the fixed side edge 52b. In the free side edge 52a of the barrier cuff sheet 52, a cuff elastic body 57 made of a string-like or strand-like elastic material and extending in the longitudinal direction Y is attached retractably in an extended state. The contraction of the cuff elastic body 57 separates the free side edge 52a from the body side liner 50 to the body side of the wearer, and forms a pair of leakproof cuffs for preventing lateral leakage of the body fluid. The leak-proof sheet 53 is formed of a liquid-impervious fibrous non-woven fabric, a liquid-impervious and moisture-permeable plastic film, or a laminate sheet thereof, and covers at least substantially the entire lower surface of the liquid-absorbent core 51. It is arrange | positioned and prevents that a bodily fluid leaks out from the non-skin opposing surface (bottom face) side of the liquid absorption structure 15. As shown in FIG.

<Front waist elastic area>
The front waist region 11 has front waist

elastic regions

60A and 60B in which front waist elastics 61 to 64 located between the

front edge portions

11a and 11b are disposed. For convenience of explanation, the front waist

elastic regions

60A, 60B extend from the front waist opening edge 14a toward the crotch region 13 with respect to the front end edge 15a of the liquid absorbent structure 15, and extend in the transverse direction X Upper elastic region 60A in which upper elastic

elastic bodies

61 and 62 are disposed, and a plurality of string-like or strand-like lower front waists which are positioned on the crotch region side relative to the upper elastic region 60A and extend in the lateral direction X And a lower elastic region 60B in which the

elastic bodies

63 and 64 are disposed. When the dimension in the longitudinal direction Y of the

front edge portions

11a and 11b of the front waist region is about 200 to 250 mm, the dimension in the longitudinal direction Y of the upper elastic region 60A is 100 to 120 mm, and the dimension in the longitudinal direction Y of the lower elastic region B Is about 100 to 130 mm.

The upper front waist elastics 61 and 62 are a first front waist elastic 61 located on the front waist opening edge 14 a and a second waist elastic 62 located on the crotch region 13 side of the first front waist elastic 61. Lower front waist

elastic bodies

63 and 64 are located at the front waist opening edge 14a side, and the fourth front front located at the crotch region 13 side of the third front waist elastic body 63. And a waist elastic body 64.

The number, the fineness and the pitch of each front waist elastic body 61 to 64 are appropriately adjusted according to the size of the diaper 10. In the present embodiment, the first front elastic waist body 61 has a denier of about 300 to 800 dtex and a pitch of about The second front elastic waist body 62 has a denier of 300 to 800 dtex, a pitch of 6 to 12 mm, about 2 and is made of an elastic material disposed in a state of being stretched about 4 to 8 mm and about 2.2 to 2.4 times. And the third front elastic body 63 has a denier of 600 to 950 dtex, a pitch of 6 to 12 mm, and about 2.3 to 2.7. The fourth front elastic waist 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 a stretched state. In the present specification, the pitch (separating dimension) between adjacent front and rear waist elastics means the dimension in the longitudinal direction in the non-existing region of the elastic bodies formed between the elastic bodies in the longitudinal direction Y. Also, “the pitches are substantially the same” includes differences due to manufacturing errors and the like of about 0 to 3.0 mm.

<After waist elastic area>
The rear waist region 12 has 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 and 70B extend from the rear waist opening edge 14b to the crotch region 13 side of the rear end edge 15b of the liquid absorbent structure 15 and extend in the lateral direction X Upper elastic region 70A in which upper

elastic waist bodies

71 and 72 are arranged, and a plurality of string or strand lower portions extending in the transverse direction X and located on the crotch region 13 side with respect to the upper elastic region 70A And a lower elastic region 70B in which the rear waist elastics 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 of the rear end edge 15b of the liquid absorbent structure 15, and the lower elastic region 70B is an upper elastic region It is located between 70 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 edge portions

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 is The dimensions are about 130-150 mm.

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

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

<Method of measuring elongation stress>
The extensional stress of the elastic region in which each waist elastic body is disposed was measured using a Shimadzu tensile tester. In the measurement, each elastic area was cut out from the front and

rear waist areas

11 and 12 of the diaper 10 having a dimension W1 of 600 mm in the lateral direction X, and used as a sample. First, while one end of the sample is fixed to the upper chuck of the tensile test and the other end of the sample is fixed to the lower chuck, they are separated by 180 mm (the size of the grip of the chuck is about 15 mm). Next, move the lower chuck at a speed of 100 mm / min, separate the chucks until the distance between the chucks is 460 mm, reverse the movement, move the chucks closer to the distance of 180 mm, and then reverse the movement again The elongation stress (N) at the time of making it space to 460 mm was measured.

As a result of the above measurement, the extension stress of the upper

elastic region

60A, 60B of the front waist elastic body is about 1.1 N, the extension stress of the lower elastic region 60B is about 2.0 N, and the rear waist

elastic region

70A, 70B Of the upper elastic zone 70A was about 1.3 N, and that of the lower elastic zone 70B was about 2.9 N. Therefore, the correlation of the extension stress of those elastic regions was: upper elastic region 60A <lower elastic region 60B, upper elastic region 70A <lower elastic region 70B. Further, the extensional stress of the elastic region in which the second front waist elastic body 62 is disposed is about 0.98 N, and the elastic region having the lowest extension stress among the front waist

elastic regions

60A and 60B, The extensional stress of the elastic region in which the rear waist elastic body 74 was disposed was about 1.98 N, and was the elastic region having the highest extensional stress among the rear waist

elastic regions

70A and 70B. Further, the extension stress of the elastic region in which the first rear waist elastic member 71 is disposed and the extension stress of the elastic region in which the second rear waist elastic member 72 is disposed are about 1.3 N and substantially the same. The Also, from the above results, the extensional stress of the elastic region in which the second rear waist elastic member 72 is disposed is higher than the extensional stress of the elastic region in which the second front waist elastic member 62 is disposed.

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

As described above, in the front and

rear waist regions

11, 12, the extensional stress of the upper

elastic regions

60A, 70A is lower than that of the lower

elastic regions

60B, 70B, respectively. As described above, since the extensional stress of the upper

elastic regions

60A and 70A positioned on the waist opening 23 side is relatively small, even the elderly with weak grip strength can easily expand the waist opening 23 at the time of wearing, and this part Compared with the case where the extension stress of is high, the wearing operation becomes easier. On the other hand, since the lower

elastic regions

60B and 70B have relatively high tensile stress, they can be stably fitted to the body of the wearer at such portions and exert the required holding force on the body. As described above, by forming the low elongation stress area and the high elongation stress area in the vertical direction of the diaper 10 and opposing them in the front-rear direction Z, operability at the time of wearing and fit to the body can be improved. It can be made to be compatible.

Referring to FIGS. 7 (a) and 7 (b), the conventional diaper 110 uses the same string-like or strand-like elastic material as the rear waist elastic body in the rear waist region 112, and the upper rear waist The pitch dimensions of the first rear waist elastic body 171 and the second rear waist elastic body 172 among the

elastic bodies

171 and 172 are different, and the pitch of the second rear waist elastic body 172 is that of the first waist elastic body 171. It is bigger than that. In the diaper 110 of the comparative example having such a configuration, when the diaper 110 is pulled up to the buttocks 78 at the time of wearing, the difference in rigidity between the region where the liquid absorbent structure 15 is present and the region located outside the longitudinal direction Y And, due to the difference in the pitch between the first rear waist elastic body 171 and the second rear waist elastic body 172 and the difference in the extension stress due to it, the upper elastic region 170A near the rear end edge 115b of the liquid absorbent structure 115 is bent As a result of being caught by the step 79 between the thigh and buttocks 78, the pulling operation can not be performed smoothly. In particular, in the diaper 110, since the rear end edge 115b of the liquid absorbent structure 115 is relatively close to the waist opening, most of the diaper 110 can not be pulled up by pulling the portion, and it is pulled up forcibly. If this happens, there is a risk that a part of the diaper 110 may break or a part of the crotch area 113 may bite into the groin.

Referring to FIGS. 8A and 8B, in the diaper 10 according to the present embodiment, the first and second rear waist

elastic bodies

71 and 72 have the same pitch size. Since the upper elastic zone 70A is entirely fitted to the body in a planar manner, and the extensional stress in the elastic zones where the first and second rear waist elastics 71, 72 are arranged is also the same, the liquid absorbent structure The vicinity of the rear end edge 15b of the body 15 is not bent and caught on the step 79, and the pulling operation can be performed smoothly. Further, in the present embodiment, the pitch of the third rear waist elastic body 73 of the lower rear waist

elastic bodies

73, 74 is also substantially the same as the pitch of the first and second rear waist

elastic bodies

71, 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 absorbent structure 15, thereby suppressing bending of the part during wearing. sell.

Further, the separation dimension of the fourth rear waist elastic body 74 of the lower rear waist

elastic bodies

73 and 74 is larger than the size of the first to third rear waist elastic bodies 71 to 73. The fourth rear elastic waist body 74 overlaps the rear end portion 16B of the liquid absorbent structure 15 in a plan view, but does not overlap the portion where the rigidity changes, so the diaper 10 can be relatively large even if the separation dimension is relatively large. When pulling up, it does not get bent and get caught on 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 area where the third rear waist elastic body 73 is disposed. The portion located between the rear end edge 51 b of the liquid core 51 and the rear joint 59 B is not fixed to the inner surface of the chassis 14. Thus, by not attaching the entire rear end portion 16B to the chassis 14, the chassis 14 is hardly affected by the change in rigidity due to the attachment of the liquid absorbent structure 15, and the waist opening 23 can be easily expanded when worn. .

Referring to FIG. 6, the separation dimension R in the longitudinal direction Y between the rear end 51b of the liquid absorbent core 51 and the elastic body of the fourth rear waist elastic body 74 located closest to the crotch region 13 is adjacent to each other. It is approximately equal to or slightly larger than the separation dimension in the longitudinal direction Y between the fourth rear waist elastics 74. The vicinity of the rear end 51b of the semi-rigid liquid-absorptive core 51 is also a portion where the rigidity tends to change, and the difference between the separation dimension of the fourth rear waist elastic body 74 in the longitudinal direction Y and the separation dimension R is relatively high. When the diaper 10 is large, when the diaper 10 is pulled up, it may be bent at the separated portion and caught in the step. In the present embodiment, when the diametrical dimension of the fourth rear waist elastic body 74 and the radial dimension R are substantially equal to or slightly larger than the longitudinal dimension Y, the absorbent core 51 is The wearing operation can be smoothly performed without the vicinity of the rear end 51b being bent.

A checkerboard-like 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 The large and small gathers are formed in combination with the gathers generated by the contraction action of the waist elastic body. Therefore, compared to the case where the outer surfaces of the front and

rear waist areas

11 and 12 are smooth, the front and

rear waist areas

11 and 12 can be gripped more easily, particularly when the rear waist area 12 of the diaper 10 is gripped and pulled up , Become familiar with the hand of the wearer / wearing assistant and it is easy to pull it up. Moreover, when the fiber layer on the outer surface side of the front and

rear waist sheets

26 and 27 contains crimped fibers, the bulkiness of the non-compression portion 30 is improved, giving the wearer a feeling such as being more familiar with the hand. be able to.

The separation dimensions of the first to fourth rear waist elastics 71 to 74 in the rear waist region 12 in the longitudinal direction Y are different from each other, but the separation dimension is about 11 mm or less in any elastic body. 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 absorbent structure 15 overlapping in plan view can be fitted to the body, and At the time of wearing operation, it is possible to suppress bending in the separated portion between the waist elastics.

9 (a) and 9 (b), the conventional diaper 200 extends in the vertical direction H in the worn state and is parallel to a longitudinal center line bisecting the dimension in the lateral direction, and a side seam 222. The virtual line 280 passing through the vertex 220 of the In the conventional diaper 200, in the worn state, side seams 222 connecting the side edges of the front and

rear waist regions

211 and 212 linearly extend in the vertical direction H along the imaginary line 280. In such a wearing state, for example, in order to arrange a separate absorption pad inside the diaper 200, when the wearing assistant grasps the front waist area 211 and pulls it diagonally downward to expand the waist opening 223, The downward pulling force F acts on the entire side seam 222 extending along the imaginary line 280. Therefore, the entire rear waist region 212 is pulled diagonally forward and is inclined and shifted downward, so that the rear waist opening edge is displaced downward from the virtual line 283 indicating a predetermined proper position. Therefore, when worn as it is, not only the wearing feeling is impaired, but also there is a possibility that leakage of excrement may occur. Moreover, after inserting and arrange | positioning an absorption pad in the diaper 200 inside from the front waist area 211 side, when correcting the position of the rear waist area 212, the rear waist area 212 is specified, adjusting the position of an absorption pad. The virtual line 283 needs to be pulled up, which takes time and effort.

With reference 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 which divides the lateral dimension into two, and passes through the apex 20 of the side seam 22. It has a virtual line 80. The side seams 22 connecting the side edges 11b and 12b of the front and

rear waist areas

11 and 12 linearly extend parallel to the virtual line 80 at the time of manufacture, but in the wearing state of the diaper 10, the virtual line It has a shape bent toward the rear waist region 12 with respect to 80. Specifically, the side seam 22 is a first portion 22A extending downward from the vertex 20, and a second portion bent at the first portion 22A, extending downward in the forward direction, and intersecting the imaginary line 80 at the intersection point 84. And two portions 22B.

Referring to FIG. 11, in order to place a separate absorbent pad inside the diaper 10, when the wearing assistant grips the front waist area 11 and pulls it diagonally downward to expand the waist opening 23, A force F, which pulls the area 11 obliquely downward, acts on the side seams 22. At this time, since the side seam 22 has a shape bent with respect to the imaginary line 80, the pulling force F acts on the first portion 22A located above it starting from the bent portion 81, and the rear waist The portion on the waist opening 23 side of the area 12 is pulled diagonally forward. On the other hand, the second portion 22B located below the bent portion 81 is not or hardly exerts an action of pulling force F, and is not pulled down obliquely forward and does not largely drop. Therefore, since the entire rear waist region 12 is not pulled diagonally forward, at least the central portion of the rear waist region 12 is located at the virtual line 83 indicating the proper position. Also, since the tensile force F acting on the first portion 22A of the side seam 22 is dispersed in the buffer region 85 defined between the imaginary line 80 and the first portion 22A, the rear waist region 12 is pulled down. It is also considered possible to suppress

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. And the tension stress of the former is higher than that of the latter, so that the side seam 22 is pulled toward the rear waist region 12 in this portion and bent in relation to the imaginary line 80. I The difference between the extension stress of the elastic region where the third rear waist elastic member 73 is disposed and the extension stress of the elastic region where the second front waist elastic member 62 is disposed is about 0 in order to form the side seams 22. It is preferable that it is more than 2N.

Further, in the front waist elastic region located in the lower part of the second portion 22B of the side seam 22, the third front waist elastic body 63 is disposed, and in the rear waist elastic region opposed thereto, the third rear waist is 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. Therefore, since the extension stress of the front waist elastic region is higher than the rear waist elastic region at the lower portion and the rear waist region 12 is pulled forward, the second portion 22B gradually separates from the imaginary line 80 from the bending portion 81 It has a downward slope as you

The side seams 22 may extend downward in a backward direction after linearly extending from the apex 20 along the imaginary line 80 as long as the bending portion 81 is positioned rearward of the imaginary line 80, or The crossing angle and the degree of inclination of the first and

second portions

22A and 22B and the imaginary line 80 can be changed as appropriate. In addition, when the front waist area 11 is pulled down obliquely, the area located above the bent portion 81 is pulled down, so when the bent portion 81 is positioned relatively downward, the pulling force F is applied downward. The portion of the waist region 12 becomes larger after the curling. Therefore, the bent portion 81 of the side seam 22 is larger than the central portion 11c of the dimension of 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 located on the imaginary line 80). It is preferable to be located above. As such, the downward bending of the entire rear waist region 12 can be avoided by positioning the bent portion 81 above the central portion 11 c. Further, the edge (outer edge 27 b) of the bent portion 38 of the rear waist sheet 27 is located at the bent portion 81 of the side seam 22. Since the rigidity changes due to the difference in the number of sheet members stacked in the rear waist area 12, it can be said that the side seam 22 is easily bent due to the change in rigidity near the end edge (outer edge 27b). Further, by arranging the plaid-like embossed pattern 28 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 extension force of the waist elastic body, so that side seams are further increased. 22 becomes easy to bend.

As described above, in the diaper 10 according to the present embodiment, the side seams 22 linearly extend in parallel with the longitudinal centerline P and the imaginary line 80 at the time of manufacture, but the front and rear waist

elastic regions

60A, 60B, By making the extension stress of each elastic region of 70A and 70B different depending on the conditions of the size, pitch, and extension ratio of the waist elastic body, the product has a shape bent with respect to the imaginary line 80, thereby, While preventing the position shift of the back waist area 12 at the time of the wearing state of the diapar 10 and 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 constituting the diaper 10 according to the present invention. Also, in the specification and claims, the terms "first", "second", "third" and "fourth" are used merely to distinguish similar elements, positions and the like.

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

A longitudinal center line having a longitudinal direction and a transverse direction orthogonal thereto, a vertical direction in the wearing state, and a longitudinal direction orthogonal to the same, and bisecting the dimension in the transverse direction, a non-skin opposing surface and a non-opposite side The longitudinal center line according to a pull-on wearing article comprising a skin facing surface, a front waist area, a rear waist area, side seams connecting both side edges of the front and rear waist areas, and a waist opening and a pair of leg openings. And an imaginary line passing through a vertex located at an edge of the waist opening of the side seam, the side seam including a first portion extending downward from the vertex And a second portion that bends from the first portion and extends forward and downward and intersects the imaginary line.

A longitudinal center line having a longitudinal direction and a transverse direction orthogonal thereto, a vertical direction in the wearing state, and a longitudinal direction orthogonal to the same, and bisecting the dimension in the transverse direction, a non-skin opposing surface and a non-opposite side A chassis having a crotch region located between the skin facing surface, a front waist region, a rear waist region, and the front and rear waist regions, a liquid absorbing structure attached to the chassis, and both side edges of the front and rear waist regions In the pull-on wearing article including the side seam connecting the parts, the waist opening and the pair of leg openings, the laterally elastic rear waist elastic zone is located in the rear waist area, and the liquid absorbent structure The body has a liquid-absorbent core having a rear end edge, and a rear end portion extending outward in the longitudinal direction from the rear end edge of the liquid-absorbent core, the rear waist elastic region comprising the waist opening From the above An upper elastic region in which a plurality of upper rear waist elastic members extending in the lateral direction and extending in the crotch region side from the rear end edge of the liquid structure are provided, and on the crotch region side with respect to the upper elastic region And a lower elastic region in which the plurality of laterally extending lower lower elastic waist members are disposed, wherein the extensional stress of the upper elastic region is lower than the extensional stress of the lower elastic region, The upper rear waist elastics are disposed at substantially equal intervals in the longitudinal direction, and the vertical separation dimension of the upper rear waist elastics adjacent to each other and the lower rear waist elastics are positioned on the waist opening side And the longitudinal separation dimensions of the elastic bodies adjacent to each other are the same.

The present invention disclosed in the above paragraphs 0053 and 0054 can include at least the following embodiments.
(1) The bent portion of the side seam is located above the central portion of the longitudinal dimension of the rear waist region.
(2) The front waist region has a front waist elastic region in which the plurality of laterally extending front waist elastic bodies are disposed, and the rear waist region includes the plurality of laterally extending rear waist elasticities. After the body is placed, it has a waist elastic area, 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 greater 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 elastic waist is interposed between the inner sheet positioned on the skin facing surface and the outer sheet positioned on the non-skin facing surface, and the outer sheet is It has a bent portion which is bent inward in the longitudinal direction along the rear end edge of the inner sheet, and the end edge of the bent portion is located at the bent portion of the side seam.
(5) On the outer surface of the front and rear waist area, a checkered embossed pattern having a plurality of compression recesses arranged and including a first concave line and a second concave line crossing each other is arranged.
(6) The separation dimension in the longitudinal direction of the rear waist elastic bodies adjacent to each other is 11 mm or less.
(7) The upper rear waist elastic body has a first rear waist elastic body located on the waist opening side and a second rear waist elastic body located on the crotch region side of the first rear waist elastic body. The lower rear waist elastic body has a third rear waist elastic body located on the waist opening side and a fourth rear waist elastic body located on the crotch region side of the third rear waist elastic body. The denier of the first rear waist elastic body is smaller than the deniers of the other rear waist elastic bodies, and the longitudinal separation dimensions of the fourth rear waist elastic bodies adjacent to each other are the other rears adjacent to each other It is larger than the longitudinal separation dimension of the waist elastic body.

10 diapers (wear items for pull-on)
11

front waist region

11a, 11b front waist region side edge portion 11c front waist region longitudinal dimension central portion 12

rear waist region

12a, 12b rear waist region side edge 13 crotch region 14 chassis 15 liquid absorbing structure 16A back end 20 of liquid absorbing structure 20 top of side seam 22 side seam 22A first portion of side seam 22B second portion of side seam 23 waist opening 24 leg opening 25 base sheet (inner sheet)
27 rear waist seat (outside sheet)
28 Embossed pattern 29A 1st concave line 29B 2nd concave line 38 bent part 62 2nd front waist elastic body 64 4th front waist elastic body 70A upper elastic area 70B after waist elastic area lower elastic area 71 after waist elastic area 71 1st rear waist elastic body 72 2nd rear waist elastic body 73 3rd rear waist elastic body 74 4th rear waist elastic body 80 imaginary line 81 bending portion 84 intersection H between side seam and virtual line H vertical direction P longitudinal center line X Horizontal Y Vertical Z Longitudinal

Claims

A longitudinal center line having a longitudinal direction and a transverse direction orthogonal thereto, a vertical direction in the wearing state, and a longitudinal direction orthogonal to the same, and bisecting the dimension in the transverse direction;
A chassis having a crotch region located between a skin-facing surface and a non-skin-facing surface opposite the skin, a front waist region, a rear waist region, and the front and rear waist regions, and a liquid-absorbent structure attached to the chassis And a pull-on wearing article including a side seam connecting both side edges of the front and rear waist regions, a waist opening and a pair of leg openings,
It further has an imaginary line extending parallel to the longitudinal center line and passing through an apex located at the edge of the waist opening of the side seam,
The side seam includes a first portion extending downward from the vertex backward, and a second portion bent downward from the first portion and extending downward and intersecting the imaginary line.
The wearing article according to claim 1, wherein the bent portion of the side seam is located above a central portion in the longitudinal dimension of the rear waist region.
The front waist region has a front waist elastic region in which the plurality of laterally extending front waist elastic bodies are disposed, and the rear waist region is disposed with the plurality of laterally extending rear waist elastic bodies. The elastic stress in the rear waist elastic region facing in the front-rear direction is higher than the elastic stress in the front waist elastic region, in the bent portion of the side seam. The wearing article as described in.
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 smaller than the separation dimension in the longitudinal direction of the rear waist elastic bodies adjacent to each other The worn article according to 3.
The upper and lower back waist elastic body is interposed between the inner sheet located on the skin facing surface side and the outer sheet located on the non-skin facing surface side, and the outer sheet is the inner sheet of the inner sheet. The wearing article according to claim 2 or 3, further comprising a bent portion which is bent inward in the longitudinal direction along a rear end edge, and an edge of the bent portion is located at a bent portion of the side seam.
A plurality of compression recesses are arranged on the outer surface of the front and rear waist region, and a checkerboard-like embossed pattern composed of a first concave line and a second concave line crossing each other is disposed. The worn article according to any of the above.
The worn article according to any one of claims 3 to 6, wherein the separated dimension in the longitudinal direction of the rear waist elastic bodies adjacent to each other is 11 mm or less.
A longitudinal center line having a longitudinal direction and a transverse direction orthogonal thereto, a vertical direction in the wearing state, and a longitudinal direction orthogonal to the same, and bisecting the dimension in the transverse direction, a non-skin opposing surface and a non-opposite side A chassis having a crotch region located between the skin facing surface, a front waist region, a rear waist region, and the front and rear waist regions, a liquid absorbing structure attached to the chassis, and both side edges of the front and rear waist regions In a pull-on wearing article comprising a side seam connecting parts, a waist opening and a pair of leg openings,
In the rear waist region, a rear waist elastic region that can expand and contract in the lateral direction is located,
The liquid-absorbent structure has a liquid-absorbent core having a rear end edge, and a rear end portion extending outward in the longitudinal direction from the rear end edge of the liquid-absorbent core,
The rear waist elastic region extends from the waist opening toward the crotch region with respect to the rear end edge of the liquid absorbent structure, and is an upper elastic region in which the plurality of laterally extending upper rear waist elastic members are disposed. And a lower elastic region located on the crotch region side relative to the upper elastic region and in which the plurality of lower lower elastic waist members extending in the lateral direction are disposed;
The extensional stress in the upper elastic region is lower than the extensional stress in the lower elastic region,
The upper rear waist elastics are arranged at substantially equal intervals in the longitudinal direction, and the vertical separation dimension of the upper rear waist elastics adjacent to each other, and the lower rear waist elastic on the waist opening side The said wearing article which is located and the same longitudinal separation dimension of an elastic body which adjoins mutually is the same.
The upper rear waist elastic body has a first rear waist elastic body located on the waist opening side and a second rear waist elastic body located on the crotch region side of the first rear waist elastic body, The lower rear waist elastic body has a third rear waist elastic body located on the waist opening side and a fourth rear waist elastic body located on the crotch region side of the third rear waist elastic body, 1) The size of the rear waist elastic body is smaller than the size of the other rear waist elastic bodies, and the longitudinal separation dimension of the fourth rear waist elastic bodies adjacent to each other is the other rear waist elastic bodies adjacent to each other The wearing article according to claim 8, which is larger than the longitudinal separation dimension of.