JP5871507B2 - Disposable wearing items - Google Patents

Description

  The present invention relates to a disposable wearing article, and more particularly, to a disposable wearing article such as a pant-type disposable diaper having a waist elastic body, a disposable toilet training pant, and a disposable incontinence pant.

  Conventionally, disposable wearing articles having a waist elastic body are known. For example, Patent Document 1 has a longitudinal direction and a lateral direction, an absorption chassis extending in the longitudinal direction from the crotch region toward the front and rear waist region, and a plurality of string-like shapes extending in the lateral direction between both side edges of the diaper or A disposable wearing article including a strand-like waist elastic body is disclosed.

Special table 2008-508082

  In the disposable wearing article according to the invention disclosed in Patent Document 1, the waist elastic body is cut and removed in the region where the absorbent core exists in the front and rear waist regions, and the contraction force is not substantially expressed. Thereby, there is no possibility that a part of an absorptive core may be wrinkled or deformed by the contraction force of the front and rear waist elastic bodies, and a decrease in the liquid absorption performance can be suppressed.

  However, in order to cut and remove the front and rear waist elastic bodies in the region where the absorbent core is present, for example, when fixing the front and rear waist elastic bodies to the sheet member and cutting them, the cause of partial breakage of the diaper And is not preferable in appearance. Further, when the front and rear waist elastic bodies are not fixed to the sheet member in the region and the front and rear waist elastic bodies do not exist by so-called cut back, a process of cutting the rubber and a process of preventing the removal thereof are performed. Necessary and equipment for that is required.

  The subject of this invention is improvement of the conventional disposable wearing article, Comprising: The disposable wearing article which can be arrange | positioned so that it may not arrange | position to an absorptive core, without cutting and removing a part of front-back waist elastic body Regarding provision.

  In order to solve the above-mentioned problems, the present invention has a longitudinal direction and a lateral direction perpendicular thereto, a skin facing surface and a non-skin facing surface, a first waist region that is one of front and rear waist regions, and A second waist region, a crotch region located between the first and second waist regions, an annular elastic waist panel forming the first and second waist regions, and the elastic waist panel. It is to improve a disposable wearing article including an absorbent chassis.

In the wearing article according to the first invention, in at least the first waist region of the first and second waist regions, a waist elastic body capable of expanding and contracting in the lateral direction is disposed, and the absorption chassis is Including an absorbent core extending from the crotch region to the first and second waist regions, wherein the waist elastic body includes an upper waist elastic body extending straight along an outer edge of the first waist region; A lower waist elastic body located on the inner edge side of one waist region, and the lower waist elastic body is a central portion that protrudes outward in the longitudinal direction at the central portion in the lateral direction of the first waist region. the a, the lower waist elastic member and the absorbent core and are intersecting Contact Raz, the first and the at least one of the second waist region, stretching can be assisted at least said lateral sheet Wherein the bets are placed.
In the wearing article according to the second invention, a waist elastic body capable of expanding and contracting in the lateral direction is disposed in at least the first waist region of the first and second waist regions, and the absorption chassis is Including an absorbent core extending from the crotch region to the first and second waist regions, wherein the waist elastic body includes an upper waist elastic body extending straight along an outer edge of the first waist region; A lower waist elastic body located on the inner edge side of one waist region, and the lower waist elastic body is a central portion that protrudes outward in the longitudinal direction at the central portion in the lateral direction of the first waist region. And both side portions located on both sides of the central portion in the lateral direction, the lower waist elastic body and the absorbent core do not intersect, and the lower waist elastic body in the first waist region The side portions may have a curved shape portion of the central portion is concave inwardly, degree of curvature of the said central portion being greater than the degree of curvature of the said side portions.

  According to the disposable wearing article of the present invention, in at least one of the first and second waist regions (front-rear waist regions), the lower waist elastic body has a curved shape whose central portion is curved outward. Has and does not cross the absorbent core. Thereby, there is no possibility that wrinkles are generated or deformed in a part of the absorbent core due to the contraction of the lower waist elastic body and the liquid absorption performance is not lowered.

The perspective view of the disposable diaper in 1st Embodiment shown as an example of the disposable wearing article which concerns on this invention. The partially broken expansion | deployment top view of a diaper. The expansion | deployment top view of the diaper which abbreviate | omitted a part of component of the absorption chassis. The exploded perspective view of a diaper. The side view of a diaper in a wearing condition. The rear view of a diaper in a wearing condition. The expansion | deployment top view of the diaper similar to FIG. 3 in 2nd Embodiment. The expansion | deployment top view of the diaper similar to FIG. 3 in 3rd Embodiment. The expansion | deployment top view of the diaper similar to FIG. 3 in 4th Embodiment.

<First Embodiment>
1-4, the diaper 10 has the vertical direction Y and the horizontal direction X orthogonal to it, the skin opposing surface and the non-skin opposing surface which opposes it, and the cyclic | annular elastic waist panel 11 extended in the circumference direction of a waist. An absorption chassis 12 attached to the skin facing surface side of the elastic waist panel 11, a front waist region 13 (first or second waist region), a rear waist region (first or second waist region) 14, And a crotch region 15 located between the front and rear waist regions 13,14. The diaper 10 has a vertical axis P and a horizontal axis Q and is symmetric about the vertical axis P.

  The elastic waist panel 11 has an elastic belt function, and includes a front waist panel 17 that forms part of the front waist region 13 and a rear waist panel 18 that forms part of 14 of the rear waist region. The front waist panel 17 has a horizontal rectangular shape defined by an inner end edge 17a, an outer end edge 17b, and both side edges (both side edges of the front waist region 13) 17c connecting the inner end edge 17a and the outer end edge 17b. Have The rear waist panel 18 includes an inner edge 18a, an outer edge 18b, an outer edge 18c extending downward from the outer edge 17b, and an obliquely extending inward from the outer edge 18c. It has a substantially trapezoidal shape defined by the inner edge 18d.

  Both side edges 17c of the front waist panel 17 and the outer edges 18c of the rear waist panel 18 facing each other are overlapped with each other, and known means such as heat embossing, sonic, etc. in the seam portion 20 arranged intermittently in the longitudinal direction Y. The waist opening 21 and the pair of leg openings 22 are defined by various heat welding means. Further, the heel flap 19 formed between the inner edges 18d of the rear waist panel 18 is a flexible portion that covers the wearer's buttock during wearing, and prevents the buttock from being exposed to the outside. At the same time, when an elastic member extending in the lateral direction X is arranged, it has a frill-like shape and can improve the appearance of the diaper.

  The front and rear waist panels 17 and 18 each include an inner layer sheet 23 positioned on the skin facing surface side and an outer layer sheet 24 positioned on the non-skin facing surface side.

The inner and outer layer sheets 23 and 24 are SMS (spunbond / meltblown / spunbond) fiber nonwoven fabric, spunbond fiber nonwoven fabric or air-through fiber nonwoven fabric having a mass of about 15 to 30 g / m ² , a plastic sheet, a laminate sheet thereof, or the like. Can be used. Both sheets 23 and 24 are joined by a hot melt adhesive applied to at least one inner surface or by the heat welding means.

  Between the inner and outer layer sheets 23 and 24 of the front waist panel 17, a plurality of string-like or strand-like front waist elastic bodies 28 are disposed so as to be stretchable in the lateral direction X. Therefore, the front waist panel 17 is elasticized at least in the lateral direction X.

  On the non-skin facing surface side of the outer layer sheet 24 of the front waist panel 17, a first auxiliary sheet 30 formed from a fiber nonwoven fabric sheet extending in the lateral direction X between both side edges 17c is disposed. The first auxiliary sheet 30 has a length dimension in the longitudinal direction Y smaller than that of the outer layer sheet 24, and inner and outer end edges 30 a and 30 b thereof are positioned more inward than the inner and outer end edges 17 a and 17 b of the front and rear waist panel 17. .

  The front waist elastic body 28 is positioned on the inner end edge 17 a side of the front waist region 13, and is laterally extended along a plurality of front lower waist elastic bodies 31 having a curved shape and the outer end edge 17 b of the front waist panel 17. A plurality of front upper waist elastic bodies 32 extending straight to X, and a plurality of front intermediate waist elastic bodies extending straight in the lateral direction X between the front upper waist elastic body 32 and the front lower waist elastic body 31 33. The front lower waist elastic body 31 includes both side portions 31A, 31A extending in the lateral direction X on both sides of the absorption chassis 12, and a central portion 31B located between the side portions 31A, 31A and projecting outward in the longitudinal direction Y. Have. The front intermediate waist elastic body 33 and the front lower waist elastic body 31 substantially intersect each other at the center of the front waist region 13, and an intersecting portion (front center high elastic region) 34 is formed. Both side portions 31A of the front lower waist elastic body 31 have a shape in which a portion on the side of the central portion 31B is bent inward and has an approximately same degree of curvature as the central portion 31B.

  Between the inner and outer layer sheets 23, 24 of the rear waist panel 18, a plurality of string-like or strand-like rear waist elastic bodies 35 are disposed so as to be contractible in the lateral direction X. It is elasticized at least in the lateral direction X.

  A second auxiliary sheet 36 extending in the lateral direction X between both side edges 18c is disposed on the non-skin facing surface side of the outer layer sheet 24 of the rear waist panel 18. The second auxiliary sheet 36 is smaller in length in the longitudinal direction Y than the outer layer sheet 24, and the inner and outer end edges 36 a and 36 b are located inward of the inner and outer end edges 18 a and 18 b of the rear waist panel 18. .

  As shown in FIG. 3, the rear waist elastic body 35 extends in the lateral direction X on the inner end edge 18 a side of the rear waist region 14, and has a plurality of rear lower waist elastic bodies 37 having a curved shape, and the rear waist panel 18. A plurality of rear upper waist elastic bodies 38 extending linearly in the lateral direction X along the outer edge 18b, and extending linearly in the lateral direction X between the rear upper waist elastic body 38 and the lower waist elastic body 37. A plurality of rear intermediate waist elastic bodies 39; The rear lower waist elastic body 37 is located between both side portions 37A, 37A extending in the lateral direction X on both sides of the absorption chassis 12 and the both side portions 37A, and is convex outward in the vertical direction Y at the center portion of the rear waist region 14. And a central portion 37B. The rear intermediate waist elastic body 39 and the rear lower waist elastic body 37 substantially intersect each other at the central portion of the rear waist region 14, and an intersecting portion (rear center high elastic region) 40 is formed. Both side portions 37A of the rear lower waist elastic body 37 have a shape in which a portion on the side of the central portion 37B is inwardly curved having a degree of curvature substantially equal to that of the central portion 37B.

  The rear waist elastic body 35 is interposed between the inner layer sheet 23 and the outer layer sheet 24 and is fixed via a hot melt adhesive applied to the inner surfaces of the sheets 23 and 24. The rear lower waist elastic body 37 is set to have a larger extension force than the other rear waist elastic bodies 35. Specifically, the rear upper waist elastic body 38 and the rear intermediate waist elastic body 39 Is an elastic material having a thickness of about 400 to 600 dtex and an expansion ratio of about 2.0 to 3.0, and the rear lower waist elastic body 37 has a thickness of about 650 to 850 dtex and an expansion ratio of about 2.0 to 3.0. Double elastic materials can be used.

  In the present embodiment, the front and rear waist elastic bodies 28 and 35 are formed of a string-like or strand-like elastic material. However, as long as the effects of the present invention described later are obtained, the first and second auxiliary sheets 30 and 36 and Similarly, it may be formed from a stretchable fiber nonwoven fabric sheet.

  As for various dimensions of the diaper 10, the dimension in the longitudinal direction Y of the diaper 10 is about 450 to 500 mm, and the dimension in the longitudinal direction Y of the side edge 17 c of the front waist region 13 (the longitudinal length of the outer edge 18 c of the rear waist region 14. L1 is about 100 to 120 mm, and the distance L2 in the longitudinal direction Y from the inner edge 17a of the front waist region 13 to the innermost elastic member 33a of the front intermediate waist elastic body 33 is L1. Is about 30-50 mm, and the dimension L3 in the longitudinal direction Y of the front intermediate waist elastic body 33 is about 20-30 mm. Further, the separation dimension L4 in the longitudinal direction Y from the lower end of the side edge 18c of the rear waist region 14 to the innermost elastic member 39a of the rear intermediate waist elastic body 39 is about 30 to 50 mm, and the vertical direction of the rear intermediate waist elastic body 39 The dimension L5 in Y is about 20 to 30 mm, and the separation dimension L6 in the longitudinal direction Y from the outermost elastic member 39b of the rear intermediate waist elastic body 39 to the outer edge 18b of the rear waist region 14 is about 40 to 60 mm. Further, the part where the absorbent core 45 and the rear lower waist elastic body 37 are most separated, that is, the longitudinal direction of the rear end edge 45 b of the absorbent core 45 on the vertical axis P and the lower end 41 of the rear lower waist elastic body 37. The separation dimension L7 in Y is about 2 to 50 mm, preferably about 5 to 20 mm, and more preferably about 10 mm. Further, the separation dimension L8 in the longitudinal direction Y between the rear end of the leg elastic body 51 and the rear lower waist elastic body 37 is about 10 to 50 mm, preferably about 20 to 40 mm, and more preferably about 30 mm.

  As shown in FIG. 3, in the rear waist region 14, the central portion 37 </ b> B of the rear lower waist elastic body 37 is bent outward in the longitudinal direction Y, so that the rear lower waist elastic body 37 and the leg elastic body 51 are It does not cross substantially. In the present embodiment, “the elastic members substantially intersect” means that the elastic members have substantially stretchable portions that overlap each other two-dimensionally and three-dimensionally. In addition, for example, the inner layer sheet 23 or the outer layer sheet 24 to which the rear waist elastic body 35 is fixed and the covering sheet 46 to which the leg elastic body 51 is fixed are joined to each other. It means that the extension force of those elastic bodies reaches between sheets. Therefore, for example, even if the leg elastic body 51 and the rear lower waist elastic body 37, which are present by the so-called cutback process and do not exhibit substantially stretchability, sterically overlap each other, It cannot be said that they intersect substantially.

  A stretchable fiber nonwoven fabric can be used for the first and second auxiliary sheets 30 and 36. As the stretchable fiber nonwoven fabric, for example, a known fiber nonwoven fabric such as a spunbond nonwoven fabric, a melt blown fiber nonwoven fabric, a heat roll fiber nonwoven fabric, an SMS fiber nonwoven fabric, an airlaid fiber nonwoven fabric, and an air-through fiber nonwoven fabric is used alone or in combination. be able to. Stretch fiber nonwoven fabrics are, for example, elastomer resins made of polystyrene, polyurethane, etc., thermoplastic resins made of polyethylene, polypropylene, polyester, acrylic, etc., cores made of polyethylene / polypropylene, polyethylene / polyethylene terephthalate, polypropylene / polyethylene terephthalate. Consists of sheath-type and side-by-side type composite fibers. In the present embodiment, the first and second auxiliary sheets 30 and 36 are fixed to the inner and outer layer sheets 23 and 24 in a state of being stretched about 1.5 to 2.0 times in the lateral direction X, respectively.

  In the present embodiment, the first and second auxiliary sheets 30 and 36 formed from the stretchable fiber nonwoven fabric are disposed on the non-skin facing surfaces of the front and rear waist panels 17 and 18, thereby providing the front and rear waist regions 13 and 14. Since stretchability is imparted, the entire diaper 10 can be fitted to the wearer's body. However, the first and second auxiliary seats 30 and 36 may be omitted as long as the front and rear waist elastic bodies 28 and 35 have a required elongation stress and have the effects of the present invention described later.

  The absorbent chassis 12 includes front and rear end portions 12E and 12F, an absorbent core 45 extending in the longitudinal direction Y at least in the crotch region 15, and a covering sheet 46 covering the entire non-skin facing surface side of the absorbent core 45. The absorption chassis 12 is a vertically long and substantially rectangular shape defined by front and rear end edges 12a and 12b and both side edges 12c and 12d. On the skin facing surface side of the absorbent core 45, an absorbent liner 48 formed of a liquid permeable nonwoven fabric is disposed.

  The front and rear end portions 12E and 12F of the absorbent chassis 12 are respectively attached to the non-skin facing surface side of the front and rear waist panels 17 and 18, and between the front and rear waist panels 17 and 18 and the first and second auxiliary seats 30 and 36. Is intervened. As described above, the front and rear end portions 12E and 12F of the absorption chassis 12 are covered with the first and second auxiliary sheets 30 and 36, so that when the diaper 10 is worn, the fingers are hooked on the front and rear end portions 12E and 12F. Therefore, there is no possibility that the absorption chassis 12 is detached from the elastic waist panel 11. However, as long as the front and rear end portions 12E and 12F of the absorbent chassis 12 are stably fixed to the elastic waist panel 11, the front and rear end portions 12E and 12F may be fixed to the skin facing surface of the elastic waist panel 11. .

  The absorbent core 45 has a panel shape extending in a substantially rectangular shape in the longitudinal direction Y, and is entirely encapsulated with a liquid diffusive sheet (not shown) such as a tissue. The covering sheet 46 extends outward from the peripheral edge of the absorbent core 45, and the extended portions are overlapped with each other and joined together via a hot melt adhesive (not shown), thereby end flaps. 49 and side flaps 50 are formed. Further, a leak-proof sheet (not shown) formed from a liquid-impermeable plastic film is disposed on the lower surface of the covering sheet 46 in the region where the absorbent core 46 exists.

The absorbent core 45 has a mass of about 400 to 600 g / m ² and is formed of fluff pulp and superabsorbent polymer particles (SAP). The cover sheet 46, hydrophobic SMS nonwoven fabric of weight approximately 10 to 30 g / ^{m 2,} or a mass of about 15 to 30 g / ^{m 2} spunbond nonwoven fabric or a plastic sheet, the use thereof and the like laminate sheet Can do.

  In the present embodiment, “the front and rear waist elastic members 28, 35 do not substantially intersect the absorbent core 45” means that each elastic member is substantially planar and three-dimensionally with the absorbent core 45. It means that they do not overlap, and includes those that intersect with a liquid diffusive sheet such as a tissue encapsulating the tissue. In particular, when the front and rear waist elastic bodies 28, 35 do not substantially intersect the absorbent core 45 and intersect the liquid diffusive sheet, the fixing region of the liquid diffusible sheet is in close contact with the wearer's body, It is possible to prevent the absorbent polymer particles from falling off and the absorbent core 45 from being deformed.

As will be described later, the absorbent core 45 has a thickness and a rigidity that are not affected by the contraction force of the front and rear waist elastic bodies 28, 35. The thickness of the part is about 1.5 to 2.5 mm, and the Gurley rigidity value based on the measuring method of JIS L 1096 is about 0.05 to 0.09 N · cm. In addition, the thickness of the center part of the absorptive core 45 is a thickness measuring device (PEACOCK
It is possible to measure using a measuring instrument having a diameter of about 10 to 20 mm.

  A plurality of string-like or strand-like leg elastic bodies 51 extending in the vertical direction Y are fixed to the side flaps 50 of the absorption chassis 12 so as to be extendable and contractible in the vertical direction Y. A part of both sides of the covering sheet 46 forming the side flap 50 is folded inward, and a pair of sleeves extending in the longitudinal direction Y is formed. A plurality of string-like or strand-like cuff elastic bodies 52 are fixed in the sleeve so as to be stretchable in the longitudinal direction Y via a hot melt adhesive. The sleeve stands up toward the wearer's body by the extension force of the cuff elastic body 52 when the diaper 10 is worn, and forms a leak-proof wall.

  For the leg elastic body 51 and the cuff elastic body 52, an elastic material made of natural rubber or synthetic rubber having a thickness of about 300 to 900 dtex and an expansion ratio of about 2.2 to 3.5 times can be suitably used. . In the present embodiment, the leg elastic body 51 is formed from three elastic materials, and the cuff elastic body 52 is formed from two elastic materials. However, the leg elastic body 51 is formed from a single elastic material or a plurality of elastic materials larger than the number of elastic materials. It may be formed.

  In the present embodiment, the front and rear waist elastic bodies 28 and 35 are disposed on the inner surfaces of the front and rear waist panels 17 and 18, but a part of the front and rear waist elastic bodies 28 and 35 is used as the first and second auxiliary seats. You may fix to the inner surface of 30,36. In such a case, for example, the front and rear waist panels 17 and 18 are formed from one sheet member having a larger dimension in the longitudinal direction Y than the inner and outer layer sheets 23 and 24 of the present embodiment, and the front and rear end portions thereof are folded back and fixed. The front and rear upper waist elastic bodies 32 and 38 and the front and rear lower waist elastic bodies 31 and 37 are respectively disposed in the upper and lower folded portions formed by the above operation, and the front and rear intermediate waist elasticity is provided on the inner surfaces of the first and second auxiliary seats 30 and 36. The bodies 33 and 39 may be arranged.

  FIG. 5 is a side view of the diaper 10 in a worn state, and FIG. 6 is a rear view of the diaper 10 in a worn state. For convenience of explanation, the wearer's body is indicated by virtual lines, and the front and rear waist elastic bodies 28 and 35 and the leg elastic bodies 51 are indicated by broken lines.

  As shown in FIGS. 5 and 6, in the front and rear waist regions 13 and 14, the center portions 31 </ b> B and 37 </ b> B of the front and rear lower waist elastic bodies 31 and 37 have curved shapes that are curved upward, respectively, It does not cross substantially. When a part of the front and rear waist elastic bodies 28 and 35 substantially intersects the absorbent core 45, the contraction force acts on the absorbent core 45, and a part of the absorbent core is wrinkled or deformed. However, in the case of this embodiment, the contraction force of the front and rear waist elastic bodies 28 and 35 does not directly act on the absorbent core 45. There is no risk of disadvantage.

  Further, even when the front and rear waist elastic bodies 28 and 35 do not substantially intersect the absorbent core 45, if they are located in the vicinity thereof, the rear end portion of the absorbent core 45 is deformed by the extension stress. Absorption performance may be reduced, or absorbed body fluid may exude. However, in the present embodiment, as described above, in the rear waist region 14, the absorbent core 45 and the central portion 37 </ b> B of the rear lower waist elastic body 37 are separated by a given dimension. Specifically, the separation dimension L7 in the longitudinal direction Y between the absorbent core 45 and the rear lower waist elastic body 37 on the vertical axis P is about 10 mm. As described above, the rear lower waist elastic body 37 and the absorbent core 45 do not substantially intersect with each other and are separated by a given dimension, so that the influence of the elastic action of the rear waist elastic body 35 is exerted. Can be prevented from being exerted on the absorbent core 45 not only directly but also indirectly.

  On the other hand, in the front waist region 13, when the wearer bends forward, the front end edge 45a of the absorbent core 45 has a front lower waist to prevent the front end portion of the absorbent core 45 from protruding forward. Although it is located in the vicinity of the elastic body 31, if such a problem does not occur by adjusting the rigidity or the like of the absorbent core 45, it may be separated by a given dimension in the same manner as the rear waist region 14. .

  As shown in FIG. 5, in the front and rear waist regions 13 and 14, front and rear end edges 45 a and 45 b of the absorbent core 45 are both side portions 31 </ b> A of front and rear lower waist elastic bodies 31 and 37 that are located in the vicinity of both side edges of the diaper 10. , 37A is positioned above the lower ends 60, 61 of the frame 37A. Therefore, the front and rear end portions of the absorbent chassis 12 including the absorbent core 45 together with the both side portions of the diaper 10 by the stretching force of the front and rear waist elastic bodies 31 and 37 when grasping and pulling up the both side portions of the diaper 10 by hand. Since 12E and 12F are also pulled up, the front and rear end portions 12E and 12F can be fitted to desired positions on the wearer's abdomen and buttocks, respectively. Further, in order to fit the front and rear waist regions 13 and 14 to the wearer's body, it is preferable that the front and rear waist elastic bodies 28 and 35 are disposed on the whole. When the elastic bodies 31 and 37 and the front and rear intermediate waist elastic bodies 33 and 39 are separated by a given dimension, the front and rear waist regions 13 and 14 may be separated from the body at the separated portion. However, since the front / rear and lower waist elastic bodies 31 and 37 have a curved shape, it is possible to apply an extension force due to the elastic material to a separation portion between the front and rear lower waist elastic bodies 31 and 37 and the front and rear intermediate waist elastic bodies 33 and 39. Therefore, a relatively wide range of expansion and contraction can be formed using a relatively small amount of elastic material.

  As described above, the Gurley rigidity value of the absorbent core 45 is about 0.05 to 0.09 N · cm. When the rigidity value of the absorbent core 45 is within such a range, the absorbent core 45 does not partially deform in a state where it does not substantially intersect with the front and rear waist elastic bodies 28 and 35, and Can adapt to the movement of the wearer's body. That is, when the Gurley stiffness value is about 0.05 N · cm or less, even if the absorbent core 45 is not substantially intersecting with the front and rear waist elastic bodies 28, 35, There is a risk that wrinkles are generated or deformed in part due to the contraction force. On the other hand, when the Gurley rigidity value is about 0.09 N · cm or more, the rigidity of the absorbent core 45 is relatively high, and the body cannot be adapted to the wearer's movement and is separated from the body. There is a risk of leakage.

  Further, the rear lower waist elastic body 37 and the leg elastic body 51 are separated from each other in the longitudinal direction Y and do not substantially intersect each other. Usually, when the leg elastic body 51 and a part of the rear waist elastic body 35 substantially cross each other, the leg elastic body 51 is drawn inward of the diaper 10 by the rear waist elastic body 35 contracting, The leg opening edge may bite into the wearer's cleft. In particular, the diaper outer shape is formed from a series of sheet members, and the front and rear waist regions 13 and 14 and the leg elastic bodies are arranged in a curved shape along the leg opening edge, as in this embodiment. Such a problem may occur when the crotch region 15 is formed separately. Thus, when the leg opening edge bites into the wearer's cleft, it not only gives discomfort, but there is a risk of excrement leakage, and a part of the rear waist region 14 is outward. Since it bulges in a convex shape and a part of the buttock is exposed, it is not preferable in appearance. In the present embodiment, the rear lower waist elastic body 37 and the leg elastic body 51 do not substantially intersect with each other because the central portion 37B of the rear lower waist elastic body 37 has a shape that is curved outward. Since the elastic body 51 is not directly affected by the contracting action of the rear lower waist elastic body 37, there is no possibility of causing such a disadvantage. In addition, in order to exhibit these effects by the center portions 31B and 37B of the front and back lower waist elastic bodies 31 and 37 being bent outward in the vertical direction, the uppermost ends 34a and 40a of the intersecting portions 34 and 40 are formed on the diaper 10. It is preferable that it is located above the center line 65 (indicated by a virtual line in FIG. 5) that bisects the dimension in the longitudinal direction Y of both side edges.

  In addition, when the rear lower waist elastic body 37 contracts, the rear lower waist elastic body 37 and the rear intermediate elastic body 39 substantially intersect with each other to form a higher elastic area than the other areas. Both side portions 37A contract toward the central portion 37B, and the contraction force acts so as to be linear in the lateral direction X instead of being curved as a whole. As a result, the leg opening edge of the crotch region 15 is pushed downward to prevent the wearer from biting into the cleft.

  Further, in the rear waist region 14, the intersecting portion 40 is opposed to a constricted portion of the waist that is located above the wearer's buttocks. Since this part is flat with less movement compared to the abdomen and the buttocks, a part of the rear waist region 14 can be stably adhered to the body. Moreover, since this site | part has a constriction shape, it is easy to form a clearance gap between a wearer's body and the back waist area 14, but the cross | intersection site | part 40 which has high elongation stress compared with another area | region is arrange | positioned. By doing so, it is possible to prevent formation of a gap that causes leakage of body fluid.

  In the present embodiment, as an option, the first and second auxiliary sheets 30, 36 formed of stretchable fiber nonwoven fabric are disposed in the front and rear waist regions 13, 14, so that the front and rear waist elastic bodies 28, 35 are elongated. Even if the force is set relatively low, the desired fit can be imparted in the front and rear waist regions 13 and 14. Therefore, there is no possibility that rubber marks are caused on the skin by locally pressing the skin with the front and rear waist elastic bodies 28 and 35 formed of a string-like or strand-like elastic material.

  In the present embodiment, the front and lower waist elastic bodies 31 and 37 have a curved shape in the front and rear waist regions 13 and 14, but only one of the front and rear lower waist elastic bodies 31 and 37 is curved. It may have a shape. However, as described above, the rear lower waist elastic body 37 having the curved shape in the rear waist region 14 has an effect other than that the absorption performance of the absorbent core 45 is not hindered. It is preferable to have such a curved shape.

Second Embodiment
FIG. 7 is an exploded plan view similar to FIG. 3 in the second embodiment of the present invention. In the second and third embodiments, the basic configuration of the diaper 10 is the same as that of the first embodiment, so only the differences will be described below.

  In the present embodiment, the front lower waist elastic body 31 of the front waist elastic body 28 extends straight in the lateral direction X along the inner end edge of the front waist region 13 (the inner end edge 17a of the front waist panel 17). Yes. Since the infant has a body shape in which the abdomen is greatly bulged outward, the front lower waist elastic body 31 is bent outward as in the first embodiment, and the crossing portion 34 faces the central part of the abdomen or the upper side thereof. When located, the abdomen may be compressed to cause discomfort, and particularly when the wearer is an infant, there is a risk of obstructing abdominal breathing. According to the present embodiment, the front lower waist elastic body 31 is straight and the front lower waist elastic body 31 and the front intermediate waist elastic body 33 do not substantially intersect with each other. It is not.

<Third Embodiment>
FIG. 8 is an exploded plan view similar to FIG. 3 in the third embodiment of the present invention.

  In the present embodiment, the front lower waist elastic body 31 and the rear waist elastic body 37 have a gently curved shape in which the central portions 31B and 37B have a relatively larger curve than the curved shapes of the side portions 31A and 37A. Have. In this form, since the crossing portions 34 and 40 are formed in a relatively wide range in the lateral direction X in the front and rear waist regions 13 and 14, the front and rear waist regions 13 and 14 are more stably fitted to the wearer's body. Can do.

<Fourth embodiment>
FIG. 9 is a plan view similar to FIG. 3, showing an example of still another embodiment of the diaper 10. In addition, since the basic structure of the diaper 10 is the same as that of this embodiment, only a different point is described below.

In the present embodiment, in the front waist panel 17, the inner layer sheet 23 is formed from a stretchable fiber nonwoven fabric, and the outer layer sheet 24 is formed from a non-stretchable fiber nonwoven fabric. The outer layer sheet 24 is longer in the longitudinal direction Y than the inner layer sheet 24.
The front upper waist elastic body 32 in the folded portion 70 formed by folding back and fixing a portion of the outer layer sheet that extends further outward from the outer edge of the inner layer sheet 23. Is fixed. Thus, by not providing the front lower waist elastic body 31 and the front intermediate waist elastic body 33 made of a string-like or strand-like elastic material, the center portion and the lower side of the front waist region 13 are placed on the wearer's body. Therefore, it is possible to prevent the wearer's abdomen from being marked with pressure and to reduce the feeling of pressure on the wearer's abdomen. The inner layer sheet 23 can be made of the same stretchable fiber nonwoven fabric as the first and second auxiliary sheets 30 and 36. In addition, by forming the inner and outer layer sheets 23 and 24 with stretchable fiber nonwoven fabric, the entire front waist region 13 can be stretched, but the inner layer sheet 23 formed from the stretchable fiber nonwoven fabric and non-stretchable. By laminating the outer layer sheet 24 formed from the fiber nonwoven fabric, the required tensile strength can be secured and the sheet can be prevented from tearing during use as compared with the case where the stretch fiber nonwoven fabrics are laminated. In addition, the fluffing of the sheet can be suppressed.

  For each constituent member constituting the disposable diaper of the present invention, in addition to the materials described in the present specification, various known materials usually used in this type of article can be used without limitation. Also, in the specification and claims of the present invention, the terms “first” and “second” are used merely to distinguish similar elements, positions, and the like.

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

In 1st invention, it has the vertical direction Y and the horizontal direction X orthogonal to it, and is the 1st waist area which is one of the skin opposing surface and the non-skin opposing surface, and the front-back waist area, and the other of them. A second waist region, a crotch region 15 located between the first and second waist regions, an annular elastic waist panel 11 forming the first and second waist regions, and an absorption attached to the elastic waist panel In the disposable wearing article 10 including the chassis 12, a waist elastic body 35 that can be expanded and contracted in the lateral direction X is disposed at least in the first waist area of the first and second waist areas, and the absorption chassis 12 is a crotch. An absorbent core 45 extending from area 15 to the first and second waist areas is included. The waist elastic body 35 includes an upper waist elastic body 38 extending straight along the outer edge of the first waist region, and a lower waist elastic body 37 positioned on the inner edge side of the first waist region. The waist elastic body 37 has a center portion 37B that protrudes outward in the longitudinal direction Y at the center portion in the lateral direction X of the first waist region, and the center portion 37B of the lower waist elastic body 37 and the absorbent core 45 There Contact Raz intersect, at least one of the first and second waist regions are at least the lateral direction X stretchable auxiliary sheet is arranged.
In 2nd invention, it has the vertical direction Y and the horizontal direction X orthogonal to it, and is the 1st waist area which is one of the skin opposing surface and the non-skin opposing surface, and the front-back waist area, and the other of them. A second waist region, a crotch region 15 located between the first and second waist regions, an annular elastic waist panel 11 forming the first and second waist regions, and an absorption attached to the elastic waist panel In the disposable wearing article 10 including the chassis 12, a waist elastic body 35 that can be expanded and contracted in the lateral direction X is disposed at least in the first waist area of the first and second waist areas, and the absorption chassis 12 is a crotch. An absorbent core 45 extending from area 15 to the first and second waist areas is included. The waist elastic body 35 includes an upper waist elastic body 38 extending straight along the outer edge of the first waist region, and a lower waist elastic body 37 positioned on the inner edge side of the first waist region. The waist elastic body 37 has a center portion 37B that protrudes outward in the longitudinal direction Y at the center portion in the lateral direction X of the first waist region, and the center portion 37B of the lower waist elastic body 37 and the absorbent core 45 Are not intersecting, and both side portions of the lower waist elastic body 37 in the first waist region have a curved shape in which a portion on the central portion side is bent inward, and the degree of curvature of the central portion 37B is that of the both side portions. Greater than the degree of curvature.

The first and second inventions disclosed in the above paragraph 0056 can include at least the following embodiments.
(1) The lower waist elastic body 37 has both side portions 37A located on both sides in the lateral direction X of the central portion 37B, and the edges 45a and 45b of the absorbent core 45 are lower end portions of the both side portions. The aspect located in the outer side of the said longitudinal direction rather than 60,61.
(2) The said absorptive core 45 is the aspect whose thickness of the center part is about 1.5-2.5 mm, and whose Gurley rigidity value is about 0.05-0.09 N * cm.
( 3 ) The second waist region has a lower waist elastic body 31 located on the inner edge side, and leg elastic bodies 51 extending in the longitudinal direction Y are disposed on both side edges of the crotch region 15. The lower waist elastic body 37 and the leg elastic body 51 do not intersect in the first waist area, and the lower waist elastic body 37 and the leg elastic body 51 are substantially in the second waist area. A mode of crossing.
( 4 ) A mode in which the lower waist elastic body 31 extends straight in the lateral direction X in the second waist region.
( 5 ) The front and rear waist elastic body 35 is formed from a string-like or strand-like elastic material.
( 6 ) The second waist region includes an inner layer sheet 23 formed from a stretchable fiber nonwoven fabric and an outer layer sheet 24 formed from a non-stretchable fiber nonwoven fabric.

10 Disposable wearing articles (disposable diapers)
11 Elastic waist panel 12 Absorption chassis 13 Front waist area (1st waist area or 2nd waist area)
14 Rear waist area (1st waist area or 2nd waist area)
15 Crotch area 23 Inner layer sheet 24 Outer layer sheet 30 First auxiliary sheet 31 Front lower waist elastic body (lower waist elastic body)
31A Both sides 31B of the front lower waist elastic body Center part 32 of the front lower waist elastic body Front upper waist elastic body (upper waist elastic body)
33 Front intermediate waist elastic body (intermediate waist elastic body)
34 intersection part 36 2nd auxiliary seat 37 rear lower waist elastic body (lower waist elastic body)
37A Both side portions 37B of the rear lower waist elastic body Center portion 38 of the rear lower waist elastic body Rear upper waist elastic body (upper waist elastic body)
39 Rear intermediate waist elastic body (intermediate waist elastic body)
39A Both side portions 39B of the rear lower waist elastic body Central portion 40 of the rear lower waist elastic body Crossing portion 45 Absorbent core 45a Front edge 45b of the absorbent core Rear end edge 60 of the absorbent core Both sides of the front lower waist elastic body Lower end 61 Lower end of both sides of rear lower waist elastic body

Claims (8)

It has a longitudinal direction and a transverse direction perpendicular thereto, a skin facing surface and a non-skin facing surface, a first waist region that is one of the front and back waist regions, a second waist region that is the other of them, and a first And a disposable wearing article including a crotch region located between the second waist region, an annular elastic waist panel forming the first and second waist regions, and an absorbent chassis attached to the elastic waist panel,
In at least the first waist region of the first and second waist regions, a waist elastic body capable of expanding and contracting in the lateral direction is disposed,
The absorbent chassis includes an absorbent core extending from the crotch region to the first and second waist regions;
The waist elastic body has an upper waist elastic body that extends straight along the outer edge of the first waist region, and a lower waist elastic body positioned on the inner edge side of the first waist region,
The lower waist elastic body has a central portion that protrudes outward in the longitudinal direction at a central portion in the lateral direction of the first waist region, and the lower waist elastic body and the absorbent core intersect each other. you Razz,
The wearing article, wherein at least one of the first and second waist regions is provided with an auxiliary sheet that can expand and contract at least in the lateral direction . It has a longitudinal direction and a transverse direction perpendicular thereto, a skin facing surface and a non-skin facing surface, a first waist region that is one of the front and back waist regions, a second waist region that is the other of them, and a first And a disposable wearing article including a crotch region located between the second waist region, an annular elastic waist panel forming the first and second waist regions, and an absorbent chassis attached to the elastic waist panel,
In at least the first waist region of the first and second waist regions, a waist elastic body capable of expanding and contracting in the lateral direction is disposed,
The absorbent chassis includes an absorbent core extending from the crotch region to the first and second waist regions;
The waist elastic body has an upper waist elastic body that extends straight along the outer edge of the first waist region, and a lower waist elastic body positioned on the inner edge side of the first waist region,
The lower waist elastic body has a central portion that protrudes outward in the longitudinal direction at a central portion in the lateral direction of the first waist region, and both side portions that are located on both sides in the lateral direction of the central portion. And
The lower waist elastic body and the absorbent core do not intersect,
The both side portions of the lower waist elastic body of the first waist region have a curved shape in which a portion on the central portion side is bent inward, and the degree of bending of the central portion is based on the degree of bending of the both side portions. The wearing article is also large. The edges of the absorbent core, wearing article according to claim 2 which is located outside of the longitudinal direction than the lower end of the side portions. The absorbent core has a thickness of 1 . 5 to 2.5 mm, and the Gurley stiffness value is 0 . The wearing article according to any one of claims 1 to 3, which is 05 to 0.09 N · cm. The second waist region has a lower waist elastic body located on the inner edge side, and leg elastic bodies extending in the vertical direction are disposed on both side edges of the crotch region, and the first waist said lower waist elastic member and said leg elastic member is not crossed in frequency, any one of claims 1 to 4, in the second waist region and the lower waist elastic member and the leg elastic member intersect Wearing article as described in. The wearing article according to claim 5 , wherein the lower waist elastic body extends straight in the lateral direction in the second waist region. The wearing article according to prior Kiu Est elastic body, any one of claims 1 to 6 is formed from a string-like or strand-like elastic material. The wearing article according to any one of claims 1 to 7 , wherein the second waist region includes an inner layer sheet formed from a stretchable fiber nonwoven fabric and an outer layer sheet formed from a non-stretchable fiber nonwoven fabric.

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