TWI672130B - Shorts type wearing articles - Google Patents

Abstract

An object of the present invention is to provide a pants-type wearing article that can easily pass a foot through a foot opening and that can cover the buttocks with the buttocks covering portion.

The pants-type wearing article (10) includes a buttock-corresponding region (75) and one of a first side elastic body (57a) and a second side elastic body (57b), and the hip-receiving side has The innermost rear waist elastic body (80), the buttocks corresponding elastic body (76), and the buttocks covering portion (78) surrounded by the second side elastic body, and the elongation stress of the predetermined width of the buttock elastic portion and the aforementioned 2 The elongational stress of the predetermined width of the elastic region of the side elastic body is lower than the elongational stress of the predetermined width of the elastic region of the innermost rear waist elastic body.

Description

Shorts type wearing articles

The present invention relates to a pants-type wearing article, and more particularly to a pants-type wearing article such as a disposable incontinence pants, a disposable toilet training pants, and a disposable disposable diaper. And other items having substantially the same structure as these articles.

Conventionally, a shorts-type wearing article including a main body, a liquid-absorbent structure attached to the skin of the main body, and a pair of leak-proof sides is known. For example, Patent Document 1 discloses a pants-type wearing article including a main body defining a front and rear waist region and a crotch region, a liquid absorbing structure provided on a skin facing surface of the main body, and a liquid absorbing body. One of the two sides of the structure faces the leakage preventing side, and has a buttock corresponding region formed by a portion of the rear waist region and a portion of the crotch region on the back waist region side. In the wearing article, a plurality of rear waist elastic bodies extending in the lateral direction are disposed in the rear waist region, and a hip-corresponding elastic body in which the center portion in the lateral direction is curved toward the crotch region side is disposed in the hip corresponding region, and A plurality of side elastic bodies are disposed on the free side edge portion of the leakage preventing side separated from the liquid absorbing structure. In the corresponding area of the buttocks, in the aspiration structure On both sides, a buttock covering portion surrounded by the innermost back waist elastic body and the buttocks corresponding elastic body in the back waist elastic body on the side of the crotch region is formed.

[Advanced technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2013-255777

According to the wearing article disclosed in Patent Document 1, the buttocks corresponding portion can abut the buttocks of the wearer by the buttocks corresponding elastic body, and the side elastic body disposed on the free side edge portion of the leakage preventing side. The leakage preventing side can be raised to prevent lateral leakage of body fluid.

However, in the wearing article of Patent Document 1, the buttocks covering portion can be placed along the buttocks of the wearer, but the buttocks covering portion cannot be swollen to wrap the buttocks. In particular, since the plurality of side elastic members are disposed only on the free side edge portion of the leakage preventing side, and are not applied to the buttocks covering portion, the inner portion of the buttocks covering portion close to the liquid-absorbent structure is formed into a flat shape. Unable to render a solid shape. Further, in the wearing article of Patent Document 1, the separation interval of the buttocks corresponding elastic body is narrower than the separation interval of the rear waist elastic body, and the elongation stress of the predetermined width of the buttock elastic portion is higher than that of the elastic region of the innermost rear waist elastic body. The elongation stress of the predetermined width is high, so the foot opening becomes Narrow, not easy to pass the foot.

Therefore, the object of the present invention is to improve the prior art and to provide a pants-type wearing article which can easily pass the foot through the foot opening when worn, and can form the buttocks covering portion three-dimensionally to cover the buttocks.

In order to achieve the above-described problem, the present invention provides an improvement on a shorts-type wearing article having a longitudinal direction and a lateral direction opposite to the skin and a non-skin opposing surface on the opposite side thereof, and includes: defining a front waist region, a rear waist region and a main body of the crotch region located in the front and rear waist regions; a liquid absorbing structure disposed on the skin facing surface side of the main body; and a side edge portion of the front and rear waist regions are connected to each other Waist opening and a pair of foot openings.

According to another aspect of the invention, the main system includes: a rear waist elastic region that is retractably attached to the lateral direction in an extended state by a plurality of rear waist elastic bodies separated in the longitudinal direction of the rear waist region; a part of the rear waistline region and a portion corresponding to a portion of the crotch region on the side of the rear waistline region, wherein the liquid-absorbent structure includes a pair of leak-proof sides that are separated in the lateral direction and extend in the longitudinal direction. . The leakage preventing side has a proximal edge portion joined to the liquid-absorbent structure; a distal edge portion separable from the liquid-absorbent structure; and a distal end portion of the distal end portion in the longitudinal direction a first side elastic body that is retractably mounted; and is closer to the front end side edge side than the distal end edge portion, and is expandable toward the longitudinal direction in an extended state The second side elastic body to be mounted. The second side elastic system is disposed such that the elongation stress is lower than that of the first side elastic body. The buttocks corresponding region has a buttocks-corresponding elastic body, and a central portion of the lateral direction is curved toward the crotch region side between the inner end portions of the both side edge portions of the rear waist region adjacent to the crotch region And extending in a plane view angle with the liquid-absorbent structure; a buttock elastic portion to which the buttocks corresponding elastic body is attached; and a buttock covering portion which is located at the innermost side of the crotch region side of the rear waist elastic body The rear waist elastic body, the buttocks corresponding elastic body, and the second side elastic body are surrounded. The elongation stress of the predetermined width of the buttock elastic portion and the elongation stress of the predetermined width of the elastic region of the second side elastic body are the elongation stresses of the predetermined width of the elastic region of the innermost rear waist elastic body. low.

According to one or more embodiments of the pants-type wearing article of the present invention, since the second side elastic body is disposed closer to the proximal edge portion than the distal edge portion of the leakage preventing side, the buttocks covering portion is most Since the inner rear waist elastic body, the buttocks corresponding elastic body, and the second side elastic body are surrounded, the inner side portion of the buttocks covering portion can be contracted to form the buttocks covering portion three-dimensionally. Further, the elongation stress of the predetermined width of the elastic portion of the buttocks and the elongation stress of the predetermined width of the elastic region of the second side elastic body are compared with the elongation stress of the predetermined width of the elastic region of the innermost rear waist elastic body. Low, so that the wearer's waist circumference can be stably maintained, and the buttocks can be softly covered without strongly tightening the buttocks. Also, due to the elastic part of the buttocks The elongation stress of the predetermined width is lower than the elongational stress of the predetermined width of the elastic region of the innermost back waist elastic body, so that the foot opening can be made larger and the foot can be easily passed.

10‧‧‧After disposable shorts diapers (short-type wearing items)

11‧‧‧ Front Waist Area

12‧‧‧After Waist Area

13‧‧‧Pants area

14‧‧‧ Subject

15‧‧‧Aspirating structure

52a‧‧‧ distal edge

52b‧‧‧ proximal edge

57a‧‧‧1st side elastomer

57b‧‧‧2nd side elastomer

71‧‧‧ Front waist elastic zone

72‧‧‧ Front waist elastics

73‧‧‧After waist elastic zone

74‧‧‧After waist elastic

75‧‧‧ hip corresponding area

76‧‧‧The hip corresponds to the elastomer

77‧‧‧The hip elastic part

78‧‧‧Hip cover

80‧‧‧Most medial posterior waist elastic

X‧‧‧ horizontal direction

Y‧‧‧ longitudinal direction

The drawings show specific embodiments of the invention disclosed herein, including not only indispensable structures, but also alternative and desirable embodiments.

Fig. 1 is a perspective view of the disposable diaper of the pants type according to the first embodiment, which is shown as an example of the article for wearing a shorts type according to the present invention, as viewed from the back side.

Fig. 2 is a partially cutaway development plan view of the disposable diaper which is extended in the longitudinal direction and the transverse direction to the maximum elongation of each elastic body (the extent to which the wrinkles of the elastic member shrinks).

Figure 3 is a partially cutaway exploded perspective view of the paper diaper.

Figure 4 is a schematic cross-sectional view taken along line IV-IV of Figure 2 .

Figure 5 is a plan view of the main body.

Fig. 6 is a partially enlarged view of a region surrounded by a one-point lock line VI as shown in Fig. 2.

Fig. 7 (a) is a perspective view of the wearing state of the disposable diaper as viewed from the side of the back side. Figure 7(b) is a schematic cross-sectional view taken along line VIIb-VIIb.

Fig. 8 is a plan view similar to Fig. 5 of the main body of the second embodiment.

<First embodiment>

In the following embodiments, the pants-type wearing article shown in Figs. 1 to 4 as an example of the present invention includes not only a structure indispensable to the invention but also a structure which is optional and desirable. In Fig. 2, each of the elastic systems described later is in a state of overcoming its contraction force, and is elongated to a contraction force in the lateral direction X and the longitudinal direction Y so that the wrinkles of the members to which the respective elastic bodies are mounted are substantially in accordance with natural vision. The state of the degree of disappearance.

As shown in FIG. 1 to FIG. 3, the disposable pants type diaper 10 of the example of the pants-type wearing article of the present invention has a longitudinal direction Y and a transverse direction X which are orthogonal to each other, and a skin facing surface thereof. The non-skin opposing surface on the opposite side, the vertical axis P that divides the length dimension of the lateral direction X, and the horizontal axis Q that divides the length dimension of the lateral direction X are substantially symmetrical with respect to the vertical axis P, and have a front waistline region 11 The rear waist region 12 and the crotch region 13 between the front waist region 11 and the rear waist region 12.

The disposable diaper 10 further includes a main body 14 which is a basic form, and a liquid-absorbent structure 15 which is located on the skin facing surface of the main body 14 and extends in the longitudinal direction Y around the crotch region 13. In the main body 14, the both side edges for defining the crotch region 13 have a concave curved shape, and the narrowest portion of the crotch region 13 is displaced toward the front waistline region 11 side than the horizontal axis Q. The front side edge portions 11a and 11b of the front waistline region 11 and the rear side edge portions 12a and 12b of the rear waistline region 12 are intermittently interposed in the longitudinal direction Y opposite to each other in the front-rear direction of the disposable diaper 10 toward the longitudinal direction Y. The laterally extending side seams 22 are joined to define a waist opening 23 and a pair of foot openings 24. In the side seams 22, the mutually overlapping sheets are welded by conventional means such as embossing-embossing by heat or ultrasonic waves.

The main body 14 further includes: a base sheet 25 which is disposed on the opposite side of the skin, which defines the front and rear waist regions 11 and 12 and the crotch region 13 in a series of fibers, and is located on the non-skin opposite side, in the longitudinal direction Y. The front waistline sheet 26 and the back waistline sheet 27, which are made of, for example, fiber non-woven fabric, are separated from each other.

<Basic sheet>

The base sheet 25 has first and second end edges 25a and 25b that are opposed to each other in the longitudinal direction Y, and two opposite side edges 25c and 25d that are separated in the lateral direction X. The both side edges 25c and 25d are curved portions which are bent convexly from the side of the rear waist region 12 toward the front waist region 11 toward the longitudinal axis P in the crotch region 13 in the crotch region 13 The part is formed.

<front waist sheet>

The front waistline sheet 26 forms a trapezoidal shape of a portion of the front waistline region 11 and the crotch region 13, and has an intermediate inner edge 26a and an outer edge 26b extending in the lateral direction X, and two outer edges 26c extending in the longitudinal direction Y. And 26d, and two side inner edges 26e, 26f connecting the outer side edges 26c, 26d and the intermediate inner edge 26a. The inner end edges 26e and 26f of both sides have a linear portion extending linearly from the outer edges 26c and 26d in the lateral direction X, and a curved portion extending from the linear portion toward the intermediate inner edge 26a. Curved part. The front waistline sheet 26 has a rectangular main body portion 29 extending in the lateral direction X between the outer side edges 26c, 26d, and an extension portion which is narrower than the main body portion 29 and located between the inner end edges 26e, 26f of the both sides. 30. The main body portion 29 has a bent portion 33 that is bent inward along the waist opening edge. The bent portion 33 is bent inward along the first end edge 25a of the base sheet 25 while the liquid-absorbent structure 15 is placed on the inner surface of the base sheet 25, and is fixed to the base sheet 25 and the liquid-absorbent structure. 15 skin opposites.

<Back waist sheet>

The rear waistline sheet 27 forms a trapezoidal shape of a portion of the rear waistline region 12 and the crotch region 13, extending from the intermediate inner end edge 27a and the outer end edge 27b extending in the lateral direction X, and extending from the outer end edge 27b toward the longitudinal direction Y. The two outer side edges 27c, 27d and the two inner end edges 27e, 27f connecting the outer side edges 27c, 27d and the intermediate inner end edge 27a are formed. The back waist panel 27 has a rectangular main body portion 34 extending in the lateral direction X between the outer side edges 27c, 26d, and an extension portion which is narrower than the main body portion 34 and located between the inner end edges 27e, 27f of the both sides. 35. The main body portion 34 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 while the liquid-absorbent structure 15 is placed on the inner surface of the base sheet 25, and is fixed to the base sheet 25 and the liquid-absorbent structure. 15 skin opposites.

As shown in FIGS. 3 to 5, between the front waistline sheet 26 and the base sheet 25, the main body portion 29 is retractably attached in an extended state, and the front waistline elastic body 72 extends in the front waistline region 29 in the lateral direction X. . in Between the back waistline sheet 27 and the base sheet 25, the back waist elastic body 74 and the buttocks corresponding to the elastic body 76 extending from the main body portion 34 toward the extension projecting portion 35 are retractably attached in an extended state, and thereafter The waist elastic body 74 extends in the lateral direction X at the main body portion 34. The front and rear waist regions 11 and 12 are elastically stretched and contracted before and after the waist elastic regions 71 and 73 and the buttock elastic portion 77 by arranging the respective elastic bodies.

As the base sheet 25 and the front and rear waist sheets 26, 27, for example, a spunbonded fiber nonwoven fabric, SMS (spunbond-meltblown) is used, for example, a mass of about 10 to 40 g/m ² and a fiber density of, for example, about 0.03 to 0.10 g/cm ³ . - Spunbonded fiber non-woven fabric, hot air fiber non-woven fabric, moisture permeable plastic sheet, or laminated sheets of these. In the present embodiment, as the base sheet 25, for example, an SMS fiber nonwoven fabric having a mass of about 10 to 18 g/m ² and a desired mass of about 13 g/m ² can be used, and the front and rear waistline sheets 26 and 27 can be used. Spunbond fiber non-woven fabric of 15~25g/m ² and ideal quality of about 20g/m ² .

Further, in the present embodiment, the lattice-shaped embossing-embossing processing as an option is selectively performed on the outer surfaces of the front and rear waistline sheets 26 and 27, and the embossing/embossing pattern 28 of the unevenness is disposed. Further, the embossing/embossing pattern 28 is not limited to a lattice pattern, and may be formed into other patterns such as a circle. By performing embossing/concave processing on the outer faces of the front and rear waist sheets 26, 27, the softness of the sheet can be improved, the touch of the skin can be made good, and the appearance of the underpants can be felt. Further, in the present embodiment, the center portion 13C of the crotch region 13 is formed only of the base sheet 25, but may be formed of a suitable sheet such as a plurality of fiber nonwoven fabrics. But in the shape of a single layer In the case of the central portion 13C of the crotch region 13, the flexibility is more excellent than when the plurality of layers are formed, so that the central portion 13C is easily held between the wearer's thighs. Deformed along the shape of the body. Moreover, by forming a part of the main body 14 in a single-layered sheet, the manufacturing cost can be suppressed.

Regarding the respective dimensions of the disposable diaper 10 (the same size as the main body 14), the longitudinal direction Y of the disposable diaper 10 is about 600 to 1000 mm, the dimension of the lateral direction X is about 400 to 800 mm, and the front edge portion of the front waistline region 11 is The dimension of the longitudinal direction Y of the 11a and 11b (the same dimension as the longitudinal direction Y of the rear side edge portions 12a and 12b of the rear waistline region 12) is preferably about 80 to 150 mm.

<liquid-absorbent structure>

As shown in FIGS. 2 and 3, the liquid-absorbent structure 15 has a front end portion 15A, a rear end portion 15B, and a central portion 15C positioned between the front and rear end portions 15A and 15B. The liquid-absorbent structure 15 includes a body side liner 50 which is provided on the opposite side of the skin, for example, a liquid-permeable non-woven fabric, and a liquid-absorbent absorber 51 having curved side edges; a pair of barrier sides a side sheet 52; and a leakage preventing back sheet 53. The absorber 51 includes a core material composed of, for example, a mixture of fluff pulp and absorbent polymer particles having a mass of about 0 to 500 g/m ² , and a liquid absorption diffusing core material such as a tissue paper covering the entire core material. Wrap the sheet. The body side liner 50, the barrier side sheet 52, and the leakage preventing back sheet 53 are formed with end flaps 56a and 56b extending from the front end edge 51a and the rear end edge 51b of the absorbent body 51 in the longitudinal direction Y, respectively. The liquid absorbing structure 15 and the main body 14 (the base sheet 25) are joined by a conventional joining means such as a hot melt adhesive which is applied to at least one of the opposing faces of the members by a suitable pattern. The regions 60 are joined to each other. In the present embodiment, the joint region 60 is composed of a plurality of joint portions separated in the longitudinal direction Y, but may be a joint region continuously joined to the entire back surface of the liquid-absorbent structure 15.

As shown in FIG. 2, the pair of barrier side sheets 52 are members which are elongated in the longitudinal direction Y and are folded into two to fix the inner surfaces to each other, and have a skin facing surface fixed to the body side pad 50. And separating the opposing front fixing portion and the rear fixing portion in the longitudinal direction Y; the proximal edge portion 52b extending in the longitudinal direction Y; and the distal edge of the inner side in the lateral direction X from the proximal edge portion 52b Part 52a. In the distal edge portion 52a of the blocking side sheet 52, between the first side elastic body 57a, the proximal edge portion 52b and the distal edge portion 52a extending in the longitudinal direction Y, that is, at the distal end of the plane view angle At least one of the second side elastic bodies 57 on the outer side of the edge portion 52a in the lateral direction X is retractably attached in an extended state. By contracting the first side elastic body 57a, the distal edge portion 52a is separated from the body side pad 50 toward the body side of the wearer to form a pair of leak-proof sides for preventing body fluid from leaking. The leakage preventing back sheet 53 is formed of, for example, a liquid-impermeable fibrous nonwoven fabric, a liquid-impermeable, moisture-permeable plastic film, or a laminated sheet thereof, and is disposed so as to cover at least a substantially entire range of the lower surface of the absorbent body 51. The body fluid is prevented from leaking from the non-skin opposing surface (bottom surface) side of the liquid absorbing structure 15 .

The first side elastic body 57a and the second side elastic body 57b may be formed of, for example, a string-shaped or strand-shaped elastic material. Elastic material The elongation stress of the second side elastic body 57b is set to be lower than the elongation stress of the first side elastic body 57a by appropriately setting the material, the fineness, and the expansion ratio. In the present embodiment, the first side elastic body 57a is made of two elastic materials having a fineness of 620 dtex and an elongation ratio of about 3.0, and the second side elastic body 57b is made of the same material as the first side elastic body 57a. It is composed of two elastic materials having a fineness of 470 dtex and an elongation ratio of about 2.7. The first side elastic body 57a is disposed so as to overlap at least a part of the absorption area of the absorber 51 in a plan view angle (Z direction), and at least one elastic body of the second side elastic body 57 (on the outermost outermost side) The edge elastic body 58) is disposed so as not to overlap the absorber 51 in a plan view.

<front and rear waist elastic area>

As shown in FIGS. 2 and 5, the front waist elastic region 71 has an outer elastic region 71a extending in the lateral direction X on the waist opening edge side, and an inner elastic region 71c extending in the lateral direction X on the crotch region 13 side; A front intermediate elastic region 71b between the front outer elastic region 71a and the front inner elastic region 71c. The rear waist elastic region 73 has an outer elastic region 73a extending in the lateral direction X on the waist opening edge side, an inner elastic region 73c extending in the lateral direction X on the crotch region 13 side, and a rear outer elastic region 73a and a rear inner elastic portion. The rear intermediate elastic region 73b between the regions 73c.

<each elastomer>

The front waist elastic body 72 is formed of, for example, a string-like or strand-shaped elastic material which has a fineness of about 450 to 1240 dtex and which is elongated from a contracted or relaxed state to about 1.5 to 3.5 times. In the present embodiment, the front waist elastic body 72 located in the front outer elastic region 71a is composed of, for example, a plurality of elastic materials having a fineness of 620 dtex and an elongation ratio of about 2.3 times, and is disposed at a distance of 6 mm in the longitudinal direction Y. The front waist elastic body 72 located in the front intermediate elastic region 71b is disposed so as to overlap the end flap 56a of the liquid-absorbent structure 15 in a plan view, and is composed of, for example, a plurality of elastic materials having a fineness of 470 dtex and an elongation ratio of about 2.3 times. The longitudinal direction Y is disposed apart from each other by about 10 mm. The front waist elastic body 72 located in the front inner elastic region 71c is composed of, for example, five elastic materials having a fineness of 780 dtex and a plurality of elastic materials having a fineness of 620 dtex, each having an elongation ratio of about 2.5 times and a longitudinal direction Y of about 7.5 mm. Separate configurations from each other.

The back waist elastic body 74 can be formed of, for example, a string-like or strand-shaped elastic material which has a fineness of about 450 to 1240 dtex and which is elongated by about 1.5 to 3.5 times from a contracted or relaxed state. In the present embodiment, the rear waist elastic body 74 located in the rear outer elastic region 73a is composed of, for example, a plurality of elastic materials having a fineness of 620 dtex and an elongation ratio of about 2.3 times, and is disposed at a distance of 6 mm in the longitudinal direction Y. The elastic body of the rear waist elastic body 74 located in the rear intermediate elastic region 73b is disposed in a region overlapping the end flap 56b of the liquid-absorbent structure 15, and is composed of, for example, four elastic materials having a fineness of 780 dtex and an elongation ratio of about 2.1 times. The configuration is such that they are disposed apart from each other at intervals of about 7 mm in the longitudinal direction Y. The rear waist elastic body 74 located at the rear inner elastic region 73c is, for example, denier 780 dtex and a plurality of elastic materials having an elongation ratio of about 2.5 times are arranged at intervals of 15 mm in the longitudinal direction Y.

The elongation stress of the rear inner elastic region 73c is higher than the elongation stress of the rear intermediate elastic region 73b by appropriately setting the material, the fineness, the elongation ratio, and the separation distance of the elastic body of each of the rear waist elastic regions 73a, 73b, and 73c. . Specifically, when 17% of the predetermined width (30 mm width) of the portion outside the lateral direction X of the absorber 51 is elongated (the size of the natural state is 171% of the size at 100%), the post-intermediate elastic region 73b About 2.0 to 6.0 N, the rear inner elastic region 73c is about 3.0 to 8.0 N, and the elongation stress relationship is the rear inner elastic region 73c> the rear outer elastic region 73a and the rear intermediate elastic region 73b. By making the elongation stress of the elastic region 73a on the waist opening 23 side higher than the other elastic regions 73b and 73c, the waist opening edge portion can be stably held by the wearer's waist circumference, and the rear middle portion can be The elongation stress of the elastic region 73b is set to be lower than the elongation stress of the rear inner elastic region 73c, and when the toe is inserted from the foot opening 23, the inner circumferential dimension of the waist opening side becomes large, making it easy to wear. Insert the foot into the foot opening 24. In order to further exert this effect, the correlation between the elongation stress of the front waist elastic region 71 and the relationship of the rear waist elastic region 73 is the same as that of the front outer elastic region 71a, the front inner elastic region 71c> the front intermediate elastic region 71b. good.

<hip corresponding area>

As shown in FIG. 5, the main body 14 has a rear side elastic region 73c. A portion extending to the crotch region 13 is specifically the hip corresponding region 75 of the intermediate inner end edge 27a of the waist panel 27 after the crotch region 13. The buttocks corresponding region 75 has a buttock elastic portion 77 in which a plurality of buttocks corresponding to the elastic body 76 extending in a curved shape so as to be convex toward the horizontal axis Q are retractably attached in an extended state. The buttocks elastic portion 77 has a linear portion 76a that overlaps the elastic body 76 and the liquid-absorbent structure 15 and extends linearly in the lateral direction X along the vicinity of the intermediate inner edge 27a of the back waistline sheet 27; The buttocks corresponding elastic body 76 does not overlap the liquid-absorbent structure 15, and is located on the inclined portions 76b on both sides of the linear portion 76a.

The buttocks corresponding elastic body 76 has a fineness of about 500 to 800 dtex and an elongation ratio of the linear portion 76a adjusted to be about 1.0 to 1.5 times, and an elongation ratio of the inclined portion 76b is about 1.2 to 2.5 times, for example, a plurality of strings or strands. Made of elastic material. Further, in the buttock elastic portion 77, the elongation stress of the linear portion 76a having a predetermined width forms a lower elongation stress than the predetermined width of the inclined portion 76b. In this manner, the elongation ratio of the linear portion 76a is made lower than that of the inclined portion 76b, and the elongation stress of the linear portion 76a is made lower than the elongation stress of the inclined portion 76b, so that it can be positioned on both sides of the liquid-absorbent structure 15. The portion is stably fitted to the body, and it is possible to suppress the occurrence of a situation in which the liquid-absorbent structure 15 is deformed by the contraction of the buttock-corresponding elastic body 76 to hinder the liquid-absorbent property.

The dimension of the longitudinal direction Y of each of the elastic regions of the front and rear waist regions 11 and 12 can be distinguished into a predetermined ratio when the effect of the present invention can be achieved. For example, the dimensions of the longitudinal direction Y of the pair of front and rear outer elastic regions 71a, 73a, the front and rear intermediate elastic regions 71b, 73b and the front and rear are set. The dimension of the lateral elastic regions 71c and 73c in the longitudinal direction Y is formed to be 1.0 to 2.5 times, and the size of the longitudinal direction Y of each elastic region can be equally divided. It is preferable that the dimensions of the longitudinal direction Y of the front and rear outer elastic regions 71a and 73a are equal to each other.

Further, in the rear waistline region 12, the hip-receiving elastic body 76 is located near the inner end of the rear side edge portions 12a, 12b, so that the innermost rear waist elastic body of the rear waist elastic body 74 is located on the side closest to the crotch region 13 side. The 80-series is separated from the inner end portion 83 of the rear side edge portion 12a by a predetermined size, and the separation dimension R2 of the longitudinal direction Y is the innermost front waist elastic body located on the side closest to the crotch region 13 of the front waist elastic body 72. 79 is larger than the separation dimension R1 of the longitudinal direction Y of the inner end portion 82 of the front side edge portions 11a and 11b of the front waistline region 11. That is, the innermost front waist elastic body 79 is located closer to the foot opening 24 than the innermost rear waist elastic body 80. Thus, the innermost front waist elastic body 79 is located closer to the foot opening 24 side than the innermost rear waist elastic body 80, so that the width dimension of the front waist elastic region 71 (the dimension of the longitudinal direction Y) is relatively smaller than the rear waist elastic region. The 73 has a large width and can be stably stretched in a strip shape along the abdomen of the wearer protruding forward. Further, since the front side is contracted at the edge portion of the foot opening, the shape of the foot opening 24 is formed to be convex toward the front. Therefore, when the toe is inserted, it is possible to suppress the hook to the edge portion of the foot opening.

Fig. 6 is a partially enlarged plan view showing a portion surrounded by a one-point lock line VI of Fig. 2, and Fig. 7 is a perspective view of the disposable diaper 10 as viewed from the back side. In FIGS. 6 and 7, only the buttocks covering portion 78 located on one side of the lateral direction X of the absorbent body 51 will be described, but The buttocks cover 78 on the other side also has the same structure. In Fig. 7, a reference view for explaining the aspect of the buttocks covering portion 78 for wearing is shown.

As shown in FIG. 6 and FIG. 7, in the buttocks corresponding region 75, the elastic bodies of the buttocks corresponding elastic body 76, the innermost back waist elastic body 80, and the second side elastic body 57b are formed on both sides of the absorbent body 51. Or a buttock covering portion 78 surrounded by each elastic region in which the elastic contracting forces act. The buttocks covering portion 78 is located at a position facing the wearer's buttocks 81 in the wearing state, and the entire region formed by the flexible sheet member is surrounded by the elastic members, so that the hips are raised outward. Here, in the general disposable wearing article, the central portion 13C of the crotch region 13 is pulled toward the groin portion or the portion is held by the sulcus due to the action of the wearer wearing the wearer or the like. , causing a part of the buttocks to be exposed to the outside. In particular, the so-called three-piece construction paper diaper in which the front and rear waist regions 11 and 12 are formed of sheets of different bodies is likely to cause this, and the paper diaper having the buttocks covering the exposed hips is prevented from occurring in this case. as we all know. However, the buttocks sheet is a sheet for covering the buttocks that have been exposed to the outside, and is not a sheet for preventing the hips from being exposed.

As shown in Fig. 7 (b), in the present embodiment, the buttocks covering portion 78 is formed to be raised outward so as to cover the entire buttocks 81. Therefore, even if the wearer's motion is used, the buttocks corresponding to the portion are elasticized. The body 76 and/or the second side elastic body 57b are drawn toward the center portion 13C side of the crotch region 13, and as shown by the imaginary line in Fig. 7(b), The partial extension of the outer bulge corresponds to the amount of being pulled up to be in a state of being fitted to the buttocks 81. Therefore, there is no possibility that the buttocks 81 are exposed at the rear side. Therefore, it is possible to prevent the uncomfortable feeling due to the exposure of the buttocks 81 from the disposable diaper 10, the leakage of excrement, and the like. In particular, in the disposable diaper 10 of the present embodiment, since the central portion 13C of the crotch region 13 is formed of a single-layered sheet, it is deformed by being held between the underarms, whereby the buttock-corresponding elastic body 76 is easily faced downward. Pulled to play this effect.

Further, generally, in the region where the absorbent body 51 is present, the disposable diaper is bulged outward so that the appearance of the disposable diaper is visually recognized. However, in the present embodiment, the buttocks composed of the flexible sheet member are formed. The covering portion 78 is in a form of being raised outward, and the entire back surface of the disposable diaper can be raised to give an impression of the soft underwear. In particular, in the present embodiment, embossing/concavity processing is performed on the outer surfaces of the front and rear waist sheets 26 and 27 to further improve the flexibility. Therefore, it is possible to easily bulge outward and impart a soft impression of bulkiness, and the embossing/ The embossed pattern 28 can have the appearance of a panty.

In each of the elastic regions forming the buttocks covering portion 78, the elongation stress of the predetermined width of the buttocks elastic portion 77 and the elongation stress of the predetermined width of the elastic region of the second side elastic body 57b are set to be more than the rear waist elastic body 74. The elongation stress of the predetermined width of the rear inner elastic region 73c of the innermost back waist elastic body 80 on the side closest to the crotch region 13 is low. Specifically, in each of the rear waist elastic regions 73a, 73b, and 73c, a predetermined width of the portion of the absorbent body 51 outside the lateral direction X (30 mm) The elongation stress of 171% of the width (the size of the natural state is 171% of the size of 100%), the rear inner elastic region 73c is about 3.0 to 8.0N, and the buttock elastic portion 77 is about 0.5 to 5.0N. The predetermined width of the elastic region of the second side elastic body 57b of the drain side is about 1.0 to 5.0 N when the predetermined width is 171%, and the elongation stress relationship is the elastic region of the rear inner elastic region 73c> by the second side elastic body 57b. ≧ The hip elastic portion 77.

In order to wrap the buttocks, the buttocks cover portion 78 is swelled outwardly and does not strongly tighten the buttocks, and it is preferable to set the elongation stress of each elastic region defining the portion to be lower, thereby stably maintaining It is preferable that the wearer's waist region has a predetermined elongation stress. In the present invention, the elongation stress of each elastic region is in the aforementioned correlation relationship, and the inner elastic region 73c has a desired portion after abutting with a portion for maintaining the waist circumference of the wearer, particularly the portion where the intestinal bone is most stably held. The elongation stress can effectively prevent the offset of the paper diaper from slipping in the wearing state, and by setting the elongation stress of the other elastic regions to be lower, there is no discomfort caused by the tightening. Wait.

Moreover, since the inclined portion 76b of the buttocks corresponding elastic body 76 has a curved shape, it can expand and contract in the lateral direction X and the longitudinal direction Y (or all directions). Therefore, when the entire hip-corresponding elastic body 76 extends linearly in the lateral direction X, when the buttocks covering portion 78 is flattened downward, the buttocks covering portion 78 can be elongated toward the square. The shape of the wearer's buttocks fits into the body. Further, as a function of the intended function of the buttocks covering portion 78, a pumping function, that is, a second side elastic body that defines the buttocks covering portion 78, for example, due to the movement of the wearer, can be considered. 57b contracts with the movement of the absorbent body 51 to contract or the buttocks corresponding to the contraction of the elastic body 76, and the buttocks covering portion 78 is repeatedly contracted and expanded. At this time, wrinkles (foot wrinkles formed by the hips corresponding to the elastic body 76 are utilized by the outside air. The pleats enter and exit the buttock cover portion 78 to prevent the sultry pumping function in the disposable diaper 10.

The elongation stress of the second side elastic body 57b is lower than that of the first side elastic body 57a. When the second side elastic body 57b forms an imaginary elastic band around the edge of the foot opening by the front waist elastic body 72 and the buttocks corresponding elastic body 76 that intersect with each other, the portion extending from the buttocks corresponding elastic body 76 toward the rear is used. To help the leak-proof side stand up and function, no high elongation stress is required. Therefore, the first side elastic body 57a has a high elongation stress for allowing the distal end edge portion 52a of the leakage preventing side to stand up to exhibit a sufficient leakproof function, and the second side elastic body 57b is also provided. It is sufficient to have a low elongation stress which can form the buttocks covering portion 78, and it is possible to prevent the elongation stress of the entire leak-proof side from becoming excessively high and to tighten the body. Further, since the outermost side elastic body 58 located at the outermost side in the plan view is disposed in the non-existing region of the absorber 51 in the second side elastic body 57b, the outermost side elastic body 58 is not shrunk against the rigidity of the absorber 51. Even if it is a low elongation stress, it can be shrunk to the extent that the base sheet 25 and the back waist sheet 27 can form the buttocks cover portion 78.

Further, in order to form the buttocks covering portion 78 to the outer side so as to cover the entire buttocks, the surface area of the buttocks covering portion 78 needs to be large. In the present embodiment, the longitudinal direction of the buttocks covering portion 78 is Y. The size is larger than other paper diapers used in general. Therefore, it has a large surface area. Specifically, the maximum dimension of the longitudinal direction Y of the buttocks covering portion 78 (the separation dimension between the innermost back waist elastic body 80 and the linear portion 76a of the buttocks corresponding elastic body 76, see FIG. 6) L3 has the rear waist region 12 The size L2 of the longitudinal direction Y of the side edge portions 12b and 12c is about 60 to 80%.

Further, at both side edges of the rear waist region 12, the buttocks corresponding elastic body 76 and the innermost back waist elastic body 80 (the rear waist elastic body 74) are separated in the longitudinal direction Y, and do not cross each other in a plan view. By the fact that the elastic bodies are not crossed, the buttocks corresponding elastic body 76 is not directly affected by the contraction seat in which the rear waist elastic body 74 contracts in the waist direction, and therefore, the foot opening edge portion can be made by its own contraction action. It conforms to the body, and a curved convex hip cover portion 78 can be formed by its curved shape. In order to achieve this effect, the separation dimension R3 of the innermost back waist elastic body 80 of the rear side edge portions 12a and 12b and the longitudinal direction Y of the buttocks corresponding elastic body 76 is preferably about 100 to 180 mm. This is because, in the case where the separation dimension R is less than about 100 mm, the contraction force of the elastic body 80 affects the generation of the hips corresponding to the elastic body 76. When the separation size R3 exceeds about 200 mm, there is a position in the inclined portion 76b. The inelastic region between the elastic bodies 80 becomes large, which causes a decrease in the fit of the wearer's waist circumference.

Further, the separation size (pitch) between the buttocks corresponding to the elastic bodies 76 is set to be smaller than the separation size between the waist elastic bodies 74 after the rear inner elastic regions 73c. The elastic region including the innermost back waist elastic body 80 can form a belt-shaped elastic region which can be stably fitted to the waist of the wearer by widening the separation size between the elastic bodies, and Further, by making the width dimension of the buttocks elastic portion 77 small, the buttocks elastic portion 77 can be separated from the foot opening edge by a predetermined size.

<Second embodiment>

Fig. 8 is a plan view of the main body similar to Fig. 5 in the second embodiment of the present invention, and the absorber 51 is shown in an imaginary line. Since the basic structure of the disposable diaper 10 of this embodiment is the same as that of the disposable diaper of the first embodiment, only the differences will be described below.

In the present embodiment, in the region where the front waist elastic region 71 overlaps the absorber 51 in the plane view angle, the inelastic region 91 in which the contraction force of the front waist elastic body 72 is substantially not exhibited is defined, and similarly, the back waist elastic is elastic. In the region of the region 73 and the buttocks elastic portion 77 which overlaps the absorber 51 in a plan view, the inelastic regions 92 and 93 in which the contraction forces of the respective elastic bodies 74 and 76 are substantially not exhibited are defined. By delineating the respective inelastic regions 91 to 93, the contraction force of each of the elastic bodies 72, 74, and 76 directly acts on the absorber 51, and it is possible to suppress the occurrence of deformation such as leakage of the body fluid that has been absorbed. In order to achieve this effect, at least one of the inelastic regions 91 to 93 may be defined, and an elastic region other than the elastic region of the inelastic region may be formed in a portion overlapping the absorber 51, as in the first embodiment. , extending continuously in the lateral direction X. Each of the inelastic regions 91 to 93 can be formed by various methods known in the art, for example, in which the respective elastic bodies are made non-joined, and then cut and cut back (so-called transition (snapback) Or, the elastomer of the region is cut off or subjected to an elastic deterioration treatment to be formed.

<Method for measuring elongation stress>

The elongation stress of each of the elastic regions of the front and rear waist elastic regions 71 and 73 was measured by the pull tester (INSTRON model: 5564) manufactured by INSTRON Japan Co., Ltd., and the drawing speed was set to 100 mm/min. A test piece in which the length of the transverse direction X is 30 to 50 mm is cut out from the portion of the elastic region that does not overlap the absorbent body, and the test piece in the natural state is written with a separation size of 20 mm in the lateral direction X. For the reticle, the elongation of each test piece when the separation size was 1.7 times was determined and compared. In the case where the dimension of the longitudinal direction Y of the disposable diaper 10 is not constant for each test piece, the elongation stress when the elongation of the test piece is converted into the value of the width of 30 mm is compared. Test piece. The inclined portion 76b of the buttocks elastic portion 77 and the elastic region of the second side elastic body 57b by the leakage preventing side were also measured in the same manner. Further, in the buttock elastic portion 77, a test piece having a width of 30 mm was cut along the inclined portion 76b of the buttocks corresponding elastic body 76, and the test piece was cut in the longitudinal direction Y by the elastic region of the second side elastic body 57b. The tablets were measured.

In addition to the materials described in the present specification, the constituent members of the disposable pants type diaper 10 which constitutes the present invention can be variously used in various fields generally used in the field of such articles. In addition, the terms "first" and "second" used in the specification and the claims are used to distinguish the same elements, positions, and the like.

The disclosure of the present invention described above is at least Organize the following items.

The pants-type wearing article 10 has a longitudinal direction Y and a lateral direction X, a skin facing surface, and a non-skin opposing surface on the opposite side, and includes: a front waist region 11 and a rear waist region 12, and a body of the crotch region 13 of the front and rear waist regions 11 and 12; a liquid absorbing structure 15 disposed on the skin facing surface side of the main body 14; and both side edges 11a, 12a, 11b of the front and rear waist regions 11 and 12, 12b is joined to form a waist opening 23 and a pair of foot openings 24. The main body 14 has a rear waist elastic region 73 that is retractably attached to the lateral direction X in an extended state by a plurality of rear waist elastic bodies 74 separated in the longitudinal direction Y in the rear waist region 12; and a rear waist region 12 A portion of the portion corresponds to the buttocks corresponding region 75 formed by the portion of the rear waistline region side 12 of the crotch region 13. The liquid-absorbent structure 51 includes a pair of leak-proof sides that are separated in the lateral direction X and extend in the longitudinal direction Y, and the leak-proof side has a proximal edge portion 52b that is joined to the liquid-absorbent structure 15; a distal edge portion 52a separated from the liquid-absorbent structure 15; a first side elastic body 57a that is retractably attached to the longitudinal direction Y in an elongated state at the distal end portion 52a; and a distal edge portion The 52a is closer to the proximal side edge portion 52b side than the second side elastic body 57b which is retractably attached to the longitudinal direction Y in an extended state. The buttocks corresponding region 75 has a buttocks corresponding elastic body 76 between the inner end portions of the both side edges 12a, 12b of the rear waist region 12 adjacent to the crotch region, and the central portion of the lateral direction X toward the crotch region 13 side. Extending in a curved shape and overlapping the liquid-absorbent structure 15 in a plan view angle; a buttock elastic portion 77 to which the buttocks corresponding elastic body 76 is attached; and a buttock covering portion which is in the back waist elastic body 74 The innermost back waist elastic body 80, the buttocks corresponding elastic body 76, and the second side elastic body 57b on the side of the crotch region 13 are surrounded by the predetermined width of the buttock elastic portion 77 and the second side elastic body 57b. The elongational stress of the predetermined width of the elastic region is lower than the elongational stress of the predetermined width of the elastic region of the innermost back waist elastic body 80.

The invention disclosed in the above paragraph 0049 may include at least the following embodiments, and the respective embodiments may be implemented individually or in combination.

(1) The second side elastic body 57b is disposed such that the elongation stress is lower than that of the first side elastic body 57a.

(2) The liquid-absorbent structure 15 includes the absorbent core member 51, and at least one of the second side elastic members 57b is disposed in a non-existent region of the absorbent core member 51 in a plan view.

(3) The buttocks corresponding elastic body 76 is separated from the innermost rear waist elastic body 80 in the longitudinal direction Y.

(4) The front waistline region 11 has a front waist elastic region 71 in which a plurality of front waist elastic bodies 72 are contracted in the lateral direction X in an extended state, and the front waist elastic region 71 is located at the innermost side of the crotch region 13 The front waist elastic body 79 is a position closer to the foot opening 24 side than the innermost back waist elastic body 80.

(5) The buttocks corresponding elastic body 76 has a linear portion 76a extending linearly in the lateral direction and a pair of inclined portions 76b extending along the leg opening 24, and the elongate stress of the linear portion 76a is arranged corresponding to the buttocks The elongational stress of the elastomer 76 is lower.

(6) The rear waistline region 12 has a rear outer elastic region 73a on the waist opening 23 side, a crotch region 13 side and includes an innermost rear waist elastic body 80 and an inner elastic region 73c, and a rear outer elastic region 73a and a rear inner side. The rear intermediate elastic region 73b between the elastic regions 73c, the rear waist elastic body 74 is disposed such that the elongation stress of the rear inner elastic region 73c is higher than the elongation stress of the rear intermediate elastic region 73b.

(7) The separation distance of the rear waist elastic body 74 adjacent to the rear inner elastic region 73c is larger than the separation distance of the adjacent hip corresponding elastic body 76.

(8) The liquid absorbing structure 15 includes the absorbent core member 51, and at least one of the front and rear waist elastic members 72 and 74 is formed discontinuously in a region overlapping the absorbent core member 51.

(9) The liquid-absorbent structure 15 includes the absorbent core member 51, and the buttocks-corresponding elastic body 76 is formed discontinuously in a region overlapping the absorbent core member 51.

Claims (10)

A shorts-type wearing article having a longitudinal direction and a transverse direction opposite to the skin and a non-skin opposing surface on the opposite side thereof, comprising: defining a front waist region, a rear waist region, and the front and rear waist regions a body of the crotch region; a liquid absorbing structure disposed on the skin facing surface side of the main body; and a waist opening and a pair of leg openings that are formed by connecting both side edges of the front and rear waist regions The main system has: a rear waist elastic region in which a plurality of rear waist elastic bodies are separated in the longitudinal direction in the longitudinal direction and are retractably attached in the longitudinal direction; and the rear waist region is a part of the buttocks corresponding to the portion of the crotch region on the side of the rear waistline region, wherein the liquid-absorbent structure includes a side wall that is separated from the longitudinal direction and extends toward the longitudinal direction, and the leakage-preventing side The method includes: a proximal edge portion joined to the liquid-absorbent structure; a distal edge portion separable from the liquid-absorbent structure; at the distal edge portion, a first side elastic body that is retractably mountable in the longitudinal direction; and a side closer to the proximal end edge side than the distal end edge portion, and is retractably retractable in the longitudinal direction in an extended state The second side elastic body to be mounted, wherein the buttocks corresponding region has a buttocks corresponding elastic body between the inner end portions of the both side edge portions of the rear waist region adjacent to the crotch region, and the lateral direction The central portion extends in a curved shape toward the side of the crotch region, and overlaps the liquid-absorbent structure in a plane view angle; The buttocks elastic portion of the buttocks corresponding to the elastic body; and the buttocks covering portion, wherein the innermost rear waist elastic body, the buttocks corresponding elastic body, and the second side elastic body are located on the crotch region side of the rear waist elastic body The elongation stress of the predetermined width of the buttocks elastic portion and the predetermined width of the elastic region of the second side elastic body are surrounded by the predetermined width of the elastic region of the innermost rear waist elastic body. The elongation stress is low. The pants-type wearing article according to claim 1, wherein the second side elastic system is disposed such that an elongation stress is lower than that of the first side elastic body. The pants-type wearing article according to claim 1 or 2, wherein the liquid-absorbent structure comprises an absorbent core material, and at least one of the second side elastic systems is disposed in the absorbent core material at a planar viewing angle. The area of existence. The pants-type wearing article according to claim 1 or 2, wherein the buttocks-corresponding elastic system is separated from the innermost rear waist elastic body in the longitudinal direction. The pants-type wearing article according to claim 1 or 2, wherein the front waistline region has a front waist elastic region in which a plurality of front waist elastic bodies are retractably supported in the lateral direction in an extended state, and the aforementioned The innermost front waist elastic system on the side of the crotch region in the front waist elastic region is located closer to the innermost rear waist elastic body The position of the foot opening. The pants-type wearing article according to claim 1 or 2, wherein the buttocks-corresponding elastic body has a linear portion extending linearly in the lateral direction and a pair of inclined portions extending along the foot opening And the elongation stress of the linear portion is lower than the elongation stress of the elastic body corresponding to the buttocks. The pants-type wearing article according to claim 1 or 2, wherein the rear waist region has a rear outer elastic region on the waist opening side, and is located in the crotch region and includes the innermost rear waist elastic body An inner elastic region and a rear intermediate elastic region between the rear outer elastic region and the rear inner elastic region, wherein the rear waist elastic system is disposed such that an elongation stress of the rear inner elastic region is longer than an elongation stress of the rear intermediate elastic region high. The pants-type wearing article according to claim 7, wherein the separation distance of the rear waist elastic body adjacent to the rear inner elastic region is larger than the separation distance of the adjacent buttocks corresponding elastic body. The pants-type wearing article according to claim 5, wherein the liquid-absorbent structure comprises an absorbent core member, and at least one of the front and rear waist elastic members is discontinuous in a region overlapping the absorbent core member. Ground formation. The pants-type wearing article according to claim 1 or 2, wherein the liquid-absorbent structure comprises an absorbent core member, and the buttocks-corresponding elastic system is formed discontinuously in a region overlapping the absorbent core member.