WO2015107765A1

WO2015107765A1 - Disposable underpants-type article for wear

Info

Publication number: WO2015107765A1
Application number: PCT/JP2014/080332
Authority: WO
Inventors: 瀧野　俊介
Original assignee: ユニ・チャーム株式会社
Priority date: 2014-01-16
Filing date: 2014-11-17
Publication date: 2015-07-23
Also published as: JP2015134019A; JP6278710B2

Abstract

Provided is a disposable underpants-type article for wear in which a tape fastener being pulled in a direction around the waist is stably latched and which can suppress formation of a step in the vicinity of both side edges of a liquid absorbing structure. The present invention is a disposable underpants-type article for wear in which at least a first waist region (14) out of first and second waist regions (13, 14) has elasticity in a lateral direction (X), and in which a tape fastener (20) comprises a proximal part (21) that is fixed proximate to a side edge part (14d) of the first waist region (14) and a distal part (22) that has a latching region (68) for detachably latching the tape fastener (20) onto a non-skin opposing face of the second waist region (13), wherein the latching region (68) is disposed in the second waist region (13) so as to overlap side edges (41c, 41d) of a liquid absorbing structure (41) in plan view.

Description

Disposable pants-type wearing articles

The present disclosure relates to a disposable pant-type wearing article, and more particularly, to a disposable pant-type diaper having a tape fastener.

Conventionally, disposable pants-type wearing articles having tape fasteners are known. For example, in Patent Document 1, a plurality of waist elastic bodies are disposed in the liquid absorption structure and the front and rear waist regions, and a pair of tapes disposed between the waist opening and the leg opening in the rear waist region. Disposable pants-type wearing articles having fasteners are disclosed. The tape fastener has a proximal portion that is fixed to the rear waist region via a joint region to which an adhesive is applied, and a distal portion that is hooked in a state of being folded to the proximal portion.

Japanese Utility Model Publication No. 6-77719

According to the wearing article disclosed in Patent Document 1, the waist elastic body extending around the waist gives a fit to the wearer's body, and by using the tape fastener during wearing, the size around the waist is increased. It can be adjusted to fit to wearers of various sizes to prevent slipping, and after wearing, the worn article is rounded so as to wrap the excrement and can be kept round with a tape fastener. By stopping, it can be disposed of in a sanitary manner. Further, the tape fastener is a sheet material similar to that of the back sheet, is formed from a liquid-impermeable sheet having moisture permeability, and has flexibility.

However, in the tape fastener of such a wearing article, since the tape fastener is relatively short and the proximal portion and the distal portion of the tape fastener are not located in the region where the waist elastic body is disposed, The tape fastener cannot be stably latched in a state where the tape fastener is pulled in the direction around the waist. Further, as a general problem of diapers, a step is generated in the vicinity of both side edges of the liquid absorption structure, which causes the leakage of body fluid.

An object of the present invention is to improve the conventional technique, and the tape fastener is stably hooked in a state of being pulled in the direction around the waist and suppresses the formation of a step in the vicinity of both side edges of the liquid absorbing structure. The present invention relates to provision of disposable pants-type wearing articles that can be used.

The present invention has a longitudinal direction and a lateral direction orthogonal thereto, and is a skin facing surface and a non-skin facing surface on the opposite side thereof, a first waist region that is one of front and rear waist regions, and the other of the front and rear waist regions. Including a second waist region, a crotch region located between the first and second waist regions, and a liquid absorbing structure extending at least to the second waist region with the crotch region as a center, wherein the first and second The present invention relates to a disposable pants-type wearing article in which side edge portions extending in the longitudinal direction in the waist region are joined to each other so as to overlap each other, and a tape fastener is attached in the vicinity of the side edge portion of the first waist region.

In the disposable pants-type wearing article of the present invention, at least the first waist region of the first and second waist regions has elasticity in the lateral direction, and the tape fastener is the first waist region. A proximal portion fixed in the vicinity of the side edge portion, and a distal portion having a latching area for releasably latching the tape fastener to the non-skin facing surface of the second waist area. And the latching area is arranged so as to overlap a side edge of the liquid absorbing structure in the second waist area.

According to one or more embodiments of the disposable pants-type wearing article according to the present invention, since the proximal portion of the tape fastener is disposed in the first waist region having elasticity, the second utilizing the elasticity is used. It can be stably hooked to the waist area. Moreover, since the latching | locking part located in a distal part is arrange | positioned so that it may overlap with the side edge of a liquid absorption structure in the outer surface of a front waist area, the side of the liquid absorption structure which may also cause a body fluid leak etc. A step generated in the vicinity of the edge can be suppressed.

The drawings illustrate specific embodiments of the invention and include selective and preferred embodiments as well as the essential features of the invention.
The perspective view of the disposable diaper seen from the back side shown as an example of the disposable pants type wearing article in a 1st embodiment of the present invention. The partially broken expansion | deployment top view which looked at the state which peeled the side seam of the diaper and extended in the front-back direction from the inner surface. The exploded perspective view of a diaper. FIG. 4 is a schematic sectional view taken along line IV-IV in FIG. 2. FIG. 5 is a schematic cross-sectional view taken along line VV in FIG. 1. The perspective view of the diaper seen from the front side which shows the use condition of a tape fastener. Sectional drawing which follows the VII-VII line of FIG. The figure which shows the state which rolled the diaper using the tape fastener. The expansion | deployment top view similar to FIG. 2 of the diaper in 2nd Embodiment. The expansion | deployment top view similar to FIG. 2 of the diaper in 3rd Embodiment. The perspective view of the diaper seen from the front side in 3rd Embodiment. The perspective view of the diaper seen from the front side which shows the use condition of the tape fastener in 3rd Embodiment. The expansion | deployment top view similar to FIG. 2 of the diaper in 4th Embodiment. The perspective view of the diaper seen from the front side in 4th Embodiment. The perspective view of the diaper seen from the front side which shows the use condition of the tape fastener in 4th Embodiment. The figure similar to FIG. 5 in 5th Embodiment. The figure similar to FIG. 7 in 5th Embodiment. The figure similar to FIG. 5 in 6th Embodiment. The figure similar to FIG. 5 in 7th Embodiment.

<First Embodiment>
1 to 3, a disposable diaper 10 shown as an example of a disposable pants-type wearing article according to the present invention includes a longitudinal direction Y and a transverse direction X perpendicular thereto, a longitudinal axis P and a transverse axis Q perpendicular thereto. Have.

The diaper 10 includes a skin facing surface and a non-skin facing surface on the opposite side, an annular elastic waist panel 11 extending in the direction around the waist, an absorbent chassis 12 joined to the elastic waist panel 11, and a front waist region (first 1 or the second waist region) 13, the rear waist region (the other of the first or second waist region) 14, and the crotch region 15 located between the front and

rear waist regions

13 and 14. The diaper 10 is formed symmetrically with respect to the longitudinal axis P, and the elastic waist panel 11 includes a front waist panel 16 located in the front waist region 13 and a rear waist panel 17 located in the rear waist region 14. . Proximal portions 21 of tape fasteners 20 are fixed to the outer surfaces of both side portions 18 of the rear waist panel 17, respectively.

The front waist region 13 includes an inner end edge 13a extending in the horizontal direction X, an outer end edge 13b extending in the horizontal direction X so as to be opposed to the inner end edge 13a in the vertical direction Y, and a vertical distance between the inner and

outer end edges

13a and 13b. It has a horizontally long rectangular shape defined by both

side edges

13c and 13d extending in the direction Y.

The rear waist region 14 includes an intermediate inner end edge 14a extending in the horizontal direction X, an outer end edge 14b extending in the horizontal direction X while being spaced apart from the intermediate inner end edge 14a in the vertical direction Y, and an inner side from the outer end edge 14b. It has a substantially trapezoidal shape defined by both

side edges

14c and 14d extending in a straight line, and both side

inner end edges

14e and 14f that bend the both

side edges

14c and 14d and the intermediate inner end edge 14a.

Both

side edges

13c, 13d of the front waist region 13 and both

side edges

14c, 14d of the rear waist region 14 are overlapped with each other and connected by side seams 23 intermittently positioned in the longitudinal direction Y. An edge 19 is formed, and a waist opening 24 and a pair of leg openings are defined. The side seam 23 is made by a known joining means, for example, various heat welding means such as hot embossing / debossing and sonic processing. As shown in FIG. 5, the tape fastener 20 is fixed to the first end (free end) 20 a and the second end (fixed end) 20 b facing each other in the length direction, and both side portions 18 of the rear waist region 14. It has a proximal portion 21 and a distal portion 22 that extends continuously with the proximal portion 21.

In the present embodiment, the tape fastener 20 is attached to both side portions 18 of the rear waist region 14, but may be attached only to one side portion 18 as long as the effects of the present invention described later are exhibited. The front waist region 13 may be attached to both side edges or one of them.

Referring to FIG. 3, the front waist panel 16 has a rectangular front waist sheet 25 that defines the front waist region 13. The front waist seat 25 extends in the horizontal direction X and is opposed to the inner and

outer end edges

25a and 25b that are spaced apart from each other in the vertical direction Y, and both

side edges

25c and 25d that extend in the vertical direction Y and are positioned between the inner and

outer end edges

25a and 25b. Formed from. The front waist seat 25 further includes a main body portion 27 and a bent portion 26 located on the outer side in the vertical direction from the front end portion 12 a of the absorbent chassis 12. A front elastic sheet 48 formed of a stretchable nonwoven fabric is disposed on the inner surface side of the main body 27. The bent portion 26 is bent inward in the vertical direction Y along a bent line 26 a extending in the horizontal direction X and fixed to the front elastic sheet 48 and the inner surface of the absorbent chassis 12. A plurality of strand-like or string-like front waist elastic bodies (front upper waist elastic bodies) 28 extending in the lateral direction X are contracted in an extended state between the main body portion 27 and the bent portion 26 at the waist opening edge. Fixed as possible.

The rear waist panel 17 has a trapezoidal rear waist sheet 30 that defines the rear waist region 14. The rear waist sheet 30 extends in the lateral direction X, and is opposed to each other in the longitudinal direction Y. The intermediate inner end edge 30a and the outer end edge 30b, both side edges 30c and 30d extending in the longitudinal direction Y, and both side edges 30c and 30d It is formed from concave both-side

inner end edges

30e, 30f connecting the inner end edge 30a. The rear waist seat 30 is located outside the main body 31, the rear end 12b of the absorbent chassis 12 in the longitudinal direction Y, and extends in the lateral direction X between the side edges 30c and 30d. It has an outer bent portion 33 that is bent to the inner surface side of the rear waist sheet 30 through the bent line 32 and is fixed to the inner surface of the rear end portion 12 b of the absorbent chassis 12 and the inner surface of the main body portion 31. A substantially trapezoidal rear elastic sheet 49 is disposed below the main body 31.

Between the main body portion 31 and the outer bent portion 33 of the rear waist sheet 30 and between the main body portion 31 and the rear elastic sheet 49, a plurality of strand-shaped or string-shaped rear waist elastic bodies 35 are extended in the lateral direction X. It is arrange | positioned so that contraction is possible. Further, a collar elastic body 36 extending in the lateral direction X is disposed between the rear elastic sheet 49 and the main body portion 31 so as to be contractable in an extended state.

The front and

rear waist sheets

25 and 30 have a mass of about 10 to 40 g / m ² , for example, a spunbond fiber nonwoven fabric, an SMS (spunbond / meltblown / spunbond) fiber nonwoven fabric, an air-through fiber nonwoven fabric, a plastic sheet, or the like A laminate sheet or the like can be used. The front and rear

elastic sheets

48 and 49 are formed of elastically stretchable air-through fiber (staple) nonwoven fabric or spunbonded nonwoven fabric, and are stretched about 1.8 to 3.0 times in the lateral direction X. It is fixed to the rear waist sheet 30. For example, the front and rear waist

elastic bodies

28 and 35 and the buttocks elastic body 36 have a fineness of about 300 to 800 dtex and about 1.5 to 3.5 times from a contracted or relaxed state in order to obtain a required extension stress or extension stress. The elastic material can be formed from a string-like or strand-like elastic material arranged in a stretched state, and its fineness and stretch ratio can be appropriately changed according to the required stretch stress and stretch stress.

The absorbent chassis 12 has a rectangular shape and includes a front end portion 12a, a rear end portion 12b, and an intermediate portion 12c positioned between the front and

rear end portions

12a and 12b. The absorptive chassis 12 is located on the skin-facing surface side, and has a liquid-permeable body nonwoven liner 40, a liquid-absorbing liquid-absorbing structure 41 having curved side edges, and a liquid-absorbing structure. The liquid-proof leak-proof sheet | seat 42 which covers the whole bottom face of the body 41, and the liquid-impervious or hardly liquid-permeable covering sheet 43 which forms the whole non-skin opposing surface of the absorptive chassis 12 are included. The liquid-absorbing structure 41 is a mixture of fluff pulp and superabsorbent polymer particles (SAP) or the like, or a liquid-absorbent core material formed only from SAP and tissue paper covering the entire core material. A liquid-absorbing and diffusing core wrap sheet.

The covering sheet 43 has both side portions 44 located on the outer side in the lateral direction X from both side edges of the leak-proof sheet 42. The both side portions 44 are bent inward along both side edges of the body side liner 40, and are proximal fixing portions fixed to the body side liner 40 extending in the longitudinal direction Y along the bent portion; Both end portions have inner end fixing portions fixed to the body side liner 40. A sleeve-like or loop-like free edge 43a that is not fixed to the inner surface of the body side liner 40 is located on the outer edges of the both side parts 44, and a plurality of strips extending in the longitudinal direction Y are inside the free edge 43a. The string-like or strand-like elastic body 45 is disposed in a stretched state so as to be shrinkable. When the elastic body 45 contracts, the free edge portion 43a is separated from the body side liner 40 toward the wearer's body side, and both side portions 44 fit the wearer's thigh to prevent leakage of excrement. Functions as a barrier cuff. A string-like or strand-like leg elastic body 46 is attached between the both side portions 44 of the covering sheet 43 and the leak-proof sheet 42.

Referring to FIG. 2, the rear waist region 14 is at least laterally formed by the first elastic region 51 provided with elasticity in at least the lateral direction X by the rear waist elastic body 35, the rear elastic sheet 49 and the rear waist elastic body 35. And a second elastic region 52 provided with elasticity in the direction X. The proximal portion 21 (see FIG. 5) of the tape fastener 20 is located in the first elastic region 51 in the both side portions 18 of the rear waist region 14, and as described later, when the first elastic region 51 contracts, the contraction thereof occurs. It undulates by force. Here, the first elastic region 51 is a region where the rear waist elastic body 35 overlapping the proximal portion 21 of the tape fastener 20 in plan view is disposed, and the second elastic region 52 is the first elastic region. This means an elastic region located closer to the crotch region 15 than 51. In the first elastic region 51, all or at least one rear waist elastic body 35 continuously extends in the lateral direction X between both

side edges

14c, 14d of the rear waist region 14, and a part of the first elastic region 51 is absorbent. It overlaps with the chassis 12 in plan view. In the present embodiment, the rear waist elastic body 35 in the second elastic region 52 continuously extends in the lateral direction similarly to the rear waist elastic body 35, but is cut or overlapped with the absorbent chassis 12 in a plan view. It is preferable to be in a state where substantially no contractile force is expressed (for example, a state in which the contraction force is extended by 1.0 to 1.3 times). In such a case, the rear waist elastic body 35 of the first elastic region 51 fits the absorbent chassis 12 to the wearer's body by the contraction force, while the rear waist elastic body 35 of the second elastic region 52 is the absorbent chassis. Since the contraction force does not directly act on the absorbent chassis 12 due to the discontinuity in the portion overlapping with 12, the absorbent chassis 12 fits along the shape of the wearer's body (bulging lower abdomen). It is possible to prevent body fluid from leaking from the gap formed between the body and the absorbent chassis 12. The first elastic region 51 and the second elastic region 52 have the same or different contraction force or elongation stress, fit the diaper 10 without pressing the lower abdomen of the wearer, and at the time of wearing In order to prevent sliding down or the like, it is preferable that the contraction force or elongation stress of the second elastic region 52 is higher than that of the first elastic region 51.

Referring to FIG. 5, the tape fastener 20 fixed to the outer surface of the rear waist region 14 includes a base sheet 58 that is a single tape folded in a Z-shaped cross section. The tape fastener 20 has a proximal portion 21 fixed to the outer surface of the rear waist region 14 through a joining region 60 so as not to be peeled off, and a distal portion 22. The distal portion 22 is connected to the proximal portion 21 and is opposed to the first distal portion 61 in the thickness direction of the tape fastener 20, and the second distal portion is connected to the first distal portion 61 and is opposed to it in the thickness direction. Part 62. The proximal portion 21, the first and second

distal portions

61, 62 are temporarily fixed by

temporary fixing portions

65, 66 located at the first and second

bent portions

55, 56 in the stacked state. The distal portion 22 further includes a gripping portion 63 that extends from the temporary fixing portion 65 located at the first bent portion 55 to the side seam 23 side. A latching area (fastening area) 68 formed of a hook element of a mechanical fastener or a pressure-sensitive adhesive is disposed on the inner surface of the second distal part 62 between the

temporary fixing parts

65 and 66. In the present embodiment, a hook sheet having a plurality of hook elements is disposed.

The first end 20 a located at the tip of the gripping portion 63 is detachably fixed to the side edge portion 19 located outside the side seam 23 in the lateral direction X via a temporary fixing portion 69. The outer edge of the first end 20 a is substantially flush with the outer edge of the side edge 19, and does not protrude outward in the lateral direction X from the side edge 19. There is no possibility that the holding portion 63 touches the wearer's body to give a stimulus. As an arrangement mode of the tape fastener 20, in addition to a mode in which the tape fastener 20 is folded in a Z-shaped cross section as in the present embodiment, there are two-folded ones and ones that are arranged on the outer surface of the rear waist region 14 without being folded. Though conceivable, when folded into a plurality of pieces as in the present embodiment, the tape fastener 20 can be attached to the diaper 10 in a compact manner even if the length of the tape fastener 20 is relatively large.

As the base sheet 58, a fiber nonwoven fabric, for example, a spunbond fiber nonwoven fabric having a mass of about 20 to 100 g / m ² , preferably about 40 to 80 g / m ² can be suitably used. For example, a hydrophobic hot melt adhesive having a mass of about 5 to 20 g / m ² can be used for the bonding region 60. The

temporary fixing portions

65 and 66 can be provided by performing a known pressure treatment or pressure heat treatment, for example, an emboss / deboss treatment or a sonic treatment. In the case where the tape fastener 20 itself has thermoplastic synthetic fibers, it can be temporarily fixed more stably by applying pressure and heat treatment and thermally fusing the fibers together.

<Bending stiffness value>
As described above, since the tape fastener 20 is formed from a fiber nonwoven fabric, the tape fastener 20 is excellent in flexibility as compared with the case where the tape fastener 20 is formed from a plastic film. Is a portion (high rigidity portion) where the hook sheet of the latching area 68 is located. By using a relatively flexible material as the hook sheet, the flexibility in the width direction of the tape fastener 20 is further improved. Can do.

Specifically, in the folded state of the tape fastener 20, the longitudinal direction Y of the portion excluding the high-rigidity portion (the width direction of the tape fastener 20 and the direction in which both side edges of the tape fastener 20 approach each other) KES bending The stiffness value is 0.04 to 0.44 gf · cm ² / cm, and the KES bending stiffness value in the longitudinal direction Y of the high stiffness portion is about 0.56 to 1.8 gf · cm ² / cm. Since the KES bending rigidity value in the folded state of a tape fastener formed from a plastic film, which is conventionally used for disposal or size adjustment, is about 2.0 gf · cm ² / cm, this implementation The tape fastener of the form has a lower bending rigidity value in the width direction than the conventional tape fastener, and is excellent in flexibility. In order to obtain such a bending rigidity value, it is preferable to use a spunbonded nonwoven fabric having a mass of about 20 to 100 g / m ² for the base sheet 58, and at a given distance from both side edges of the tape fastener 20 in a folded state. Thus, it is preferable that the

temporary fixing portions

65 and 66 are located, and the entire facing surfaces of the stacked portions are not temporarily fixed.

The rear waist region 14 is contracted in the lateral direction X by the contracting action of the rear waist elastic body 35, and a plurality of ridges 71 continuous in the lateral direction X are formed. In addition, at least one rear waist elastic body 35 is positioned in a region where the proximal portion 21 of the tape fastener 20 is positioned in the rear waist region 14, and the tape fastener 20 is moved to the rear side by contraction of the elastic body 35. Consecutive undulations occur along the waist region 14 in the direction around the waist. The first and second

distal portions

61 and 62 fixed to the proximal portion 21 between the temporary fixing portion 65 and the temporary fixing portion 66 are deformed by the proximal portion 21 and become smaller in length. As a result, the gripping part 63 is also separated from the outer surface, so that the wearer or the wearer is required to operate the tape fastener 20 when operating the tape fastener 20. It becomes easy to pick the holding part 63. Further, since the distal portion 22 is separated from the outer surface of the rear waist region 14 in this manner, even if the tape fastener 20 is laminated, the arrangement region has high rigidity to the extent that the wearer feels uncomfortable. There is nothing. In the tape fastener 20 having such a configuration, as indicated by the phantom line, the wearer or wear assistant of the diaper 10 picks the gripping portion 63 and pulls it up in the direction of the arrow F, thereby temporarily fixing the

portions

65, 66, 69. The temporary fixing by is released, and the tape fastener 20 is developed.

6 and 7, the deployed tape fastener 20 is hooked to the outer surface of the front waist region 13 via the hooking region 68 of the second distal portion 62. Since the base sheet 58 of the tape fastener 20 is made of fiber nonwoven fabric, it is more flexible than if it is formed from a relatively rigid plastic sheet and extends along the outer surface of the curved front waist region 13. . Further, as described above, the proximal portion 21 is easily deformed in accordance with the contraction of the rear waist region 14, and a force for pulling it toward the rear waist region 14 acts on the entire distal portion 22. Accordingly, the distal portion 22 hooked on the outer surface of the front waist region 13 is pulled rearward, and the both side edges 19 of the diaper 10 are drawn between the proximal portion 21 and the distal portion 22. The

waist regions

13 and 14 can be fitted to the wearer's body, and size adjustment is easy. In addition, you may provide the latching area 68 by apply | coating an adhesive other than a hook element. When the latching area 68 is formed from a hook element of a mechanical fastener, in addition to directly latching on the front waist sheet 25 formed from a fiber nonwoven fabric, a loop element is provided on the outer surface of the front waist area 13. A landing or target sheet having the same may be stuck and hung on the sheet.

Further, the latching area 68 of the second distal portion 62 overlaps both side edges 41c and 41d of the liquid absorbing structure 41 on the outer surface of the front waist area 13, and extends further inward in the lateral direction X than that. . The liquid-absorbing structure 41 is formed from an absorbent / discrete material such as fluffed wood pulp or superabsorbent polymer particles, and has compression / restoration elasticity, and its arrangement region swells outward. Have Therefore, both side edges 41c and 41d of the liquid absorbing structure 41 protrude outwardly to form a step in the portion. In particular, after the liquid absorbing structure 41 absorbs and retains the body fluid, it further expands to increase the step, In some cases, body fluid leaks or the appearance of the diaper 10 is impaired.

In the present embodiment, the latching area 68 of the distal portion 22 of the tape fastener 20 is disposed so as to overlap with at least one side edge of both side edges 41c and 41d of the liquid absorbing structure 41 in plan view, and The entire distal portion 22 of the tape fastener 20 is subjected to a force for pulling it backward by the contracting action of the rear waist elastic body 35, and the entire tape fastener 20 is pulled in the direction around the waist. A force for pulling backward acts on both side edges 41c and 41d of the body 41 so as to suppress the protrusion. Therefore, it is possible to prevent the side edges 41c and 41d of the liquid absorbing structure 41 from protruding outward in the arrangement area of the latching area 68 and in the vicinity thereof, and to prevent the occurrence of a step that causes leakage of body fluid. it can.

Here, “the tape fastener 20 is arranged so as to overlap with both side edges 41c and 41d of the liquid absorbing structure 41 in a plan view” means that when the tape fastener 20 is unfolded in the wearing state of the diaper 10, It means that the latching area 68 of the distal portion 22 overlaps with a part (at least both side edges) of the liquid absorption structure 41 located on the front waist area 13 side in a plan view. As a method for confirming such a configuration, for example, i) First, the distance between the side seams 23 in the front and rear waist regions 13 and 14 (the front waist region 13) in a state where the diaper 10 is stretched to the extent that no wrinkles are formed in the lateral direction. , And ii) Next, (dimension W1 + W2: waist size of diaper 10) × 75% outer diameter dimension In the state in which the cylinder is inserted into the diaper 10 through the waist opening and the front and

rear waist regions

13 and 14 are held in the cylinder, the laminated tape fastener 20 fixed to the rear waist region 14 is expanded and the front is expanded. The hook region 68 of the distal portion 22 of the pulled tape fastener 20 is pulled to the waist region 13 side, and both side edges 41c and 41d of the liquid absorbing structure 41 on the front waist region 13 side. Check that the overlap in plan view. In addition, the tape fastener 20 may be arrange | positioned only at the one side part 18 of the back waist area 14, and in such a case, the single tape fastener 20 corresponds to the side edge 14c of the back waist area 14 corresponding to it, It only has to overlap with 14d in plan view.

In order to achieve such an effect of the present invention, the extension stress of the first elastic region 51 (rear elastic region) in the rear waist region 14 where the proximal portion 21 of the tape fastener 20 is located is the first in the front waist region 13. It is preferable that the elastic region 51 is larger than the elastic region (front elastic region) facing the elastic region 51 in the front-rear direction. In such a case, the amount of contraction in the rear elastic region is larger than that in the front elastic region, and the front waist region 13 side is pulled further rearward in a state where the tape fastener 20 is fixed to the front waist region 13. The side edges 41c and 41d of the liquid absorption structure 41 due to the region 68 can be more strongly suppressed. Further, since the elongation stress in the rear elastic region is larger than that in the front elastic region, it is possible to prevent the positional deviation of the proximal portion 21 of the tape fastener 20 and to improve the fit on the back side.

Specifically, the elongation stress in the rear elastic region is about 0.3 to 0.5 N / 10 mm, whereas the elongation stress in the front elastic region is 0.15 to 0.35 N / 10 mm.

<Method for measuring elongation stress>
The elongation stress in the front-rear elastic region was measured by a cycle test using an autograph type tensile tester (for example, type AG-1KNI) manufactured by Shimadzu Corporation. First, in a state where the diaper 10 is unfolded as shown in FIG. 2 and pulled in the longitudinal direction Y and the lateral direction X to such an extent that no wrinkles are formed on the surface, the tape fastener is removed from the rear elastic region of the rear waist region 14. 20, a fixed region of the proximal portion 21 cut along a cutting line extending in parallel in the lateral direction X along both side edges of the proximal portion 21 of the 20 is a sample 1, and the proximal portion in the front waist region 13 A part of the front elastic region facing the fixed region 21 is cut out to be a sample 2. The dimensions in the lateral direction X between the side seams 23 in the front and

rear waist regions

13 and 14 of the diaper (width dimensions W1 and W2 of the front and rear waist regions 13 and 14) are measured in advance, and tensile testing is performed on both ends of each sample where the side seams are located. Sandwiched between a pair of chucks (the distance between the initial chucks is 100 mm, and is adjusted as appropriate according to the sample), and is stretched to about 85% of the initial dimensions W1 and W2 at a speed of 100 mm / min, and then the initial dimensions W1 The tensile load (N) when contracted to a length of about 70% of W2 is obtained, and converted into a stress value per 10 mm width (N / 10 mm) to be an extensional stress.

Referring to FIG. 8, an example of an aspect of discarding the diaper 10 is shown. First, after use of the diaper 10, the side seam 23 is peeled to separate both side edges of the front and back waist region 13, and the both side edges are separated. The part is bent inward, and the crotch region 15 is bent so as to be rounded toward the front and

rear waist regions

13 and 14. Next, the distal portion 22 of the tape fastener 20 is latched to the outer surface of the crotch region 15 via the latching region 68. Thereby, the state which rolled the diaper 10 can be hold | maintained, and it can dispose hygienically without leaking excrement outside. In particular, in an open type diaper having a normal tape fastener, the rolled state of the diaper cannot be maintained for a relatively long time, and the tape fastener is temporarily stored in a disposal container. However, according to the diaper 10 in the present embodiment, there is no possibility of causing such a disadvantage. Further, as described above, the latching area 68 can be formed by a hook element or a pressure sensitive adhesive of a mechanical fastener, but when it is formed by a hook element, it is formed by a pressure sensitive adhesive. Compared to the above, the latched state can be maintained for a relatively long time. Further, when the hooking area 68 is formed of a hook element, the hooking strength does not decrease even when wetted with body fluid, and the hooking is released when the diaper 10 is rolled up and discarded. In such a case, the latching operation can be repeatedly performed when the diaper 10 is tightened more strongly in order to maintain the rolled state.

The diaper 10 in each of the following embodiments has the same basic configuration as that of the first embodiment, and only differences will be described.

Second Embodiment
Referring to FIG. 9, in the present embodiment, the rear elastic sheet 49 extends over substantially the entire area of the rear waist region 14 so that the proximal portion 21 of the tape fastener 20 overlaps the rear elastic sheet 49 in plan view. Is located. As described above, the rear elastic sheet 49 formed of the elastic fiber nonwoven fabric is disposed at a position overlapping the proximal portion 21 of the tape fastener 20 in the rear waist region 14, thereby being stretchable by the thread-like rear waist elastic body 35. Compared to the case where the rear waist region 14 is provided, the entire rear waist region 14 is fitted to the wearer's dorsal side in a planar shape, and displacement of the proximal portion 21 in the wearing state can be prevented. Thereby, the liquid absorption structure 41 in which the latching area 68 overlaps in a plan view can be stably pulled backward, and the displacement of the entire diaper 10 can be prevented.

<Third Embodiment>
Referring to FIGS. 10 and 11, in the present embodiment, a plurality of string-like or strand-like front upper waist elastic bodies 28 extending in the lateral direction X along the outer edge 13 b of the front waist region 13, and the front upper side A plurality of string-like or strand-like front and lower waist elastic bodies 73 adjacent to the waist elastic body 28 and extending in the lateral direction X below the waist elastic body 28 are disposed. The front waist region 13 includes at least a front upper elastic region 71 having elasticity in at least the lateral direction X by disposing the front upper waist elastic body 28 and at least a lateral direction by disposing the front lower waist elastic body 73. And a front lower elastic region 72 having elasticity toward X.

Also, an illustration sheet 76 formed of a leakproof plastic film on which a plurality of decorative elements 75 are printed between the main body portion 27 of the front waist region 13 and the outer bent portion 26 and the front elastic sheet 48. Is placed. The decorative element 75 is visible from the outside. In the present embodiment, as an example, a star pattern is shown, but various known figures, decorative patterns, pictures, trade marks of products, etc. Also good. The front waist sheet 25 has a total light transmittance that allows the decorative element 75 to be visually recognized from the outside through the front waist sheet 25. As described above, since the elastic member is arranged in the entire front waist region 13, the extension stress acts on the front end portion of the liquid absorbing structure 41 to form wrinkles, and the dimension in the lateral direction X (width dimension) is As it becomes smaller, the width dimension of the illustration sheet 76 becomes smaller and the decorative element 75 cannot maintain the given form, and the outline becomes unclear.

Referring to FIGS. 11 and 12, in this embodiment, the tape fastener 20 is expanded and its latching area 68 is latched so as to overlap both side edges 41 c and 41 d of the liquid absorbing structure 41 in the front waist area 13. Both side edges 41c and 41d are pulled backward, and the entire front end portion of the liquid absorbing structure 41 is expanded in the lateral direction X. That is, the distal portion 22 of the tape fastener 20 is pulled rearward by the extension stress of the rear waist elastic body 35, and the latching area 68 overlaps both side edges 41 c and 41 d of the liquid absorbing structure 41, and the liquid absorbing structure Since the central portion of the front lower waist elastic body 73 crossing 41 is extended, the tape fastener 20 is further pulled in the direction around the waist. Thereby, the wrinkles formed in the liquid absorption structure 41 and the body side liner 40 are spread, and the fall of those absorption performances can be prevented. Further, the surplus portions of the front and

rear waist regions

13 and 14 are crushed near the side edge portions 19, and the arrangement region of the liquid absorbing structure 41 in the central portion of the front and

rear waist regions

13 and 14 is the tape fastener 20 and the rear waist elasticity. Since the body 35 and the front lower waist elastic body 73 are pulled in the direction around the waist, the heel generated by the contracting action of the front lower waist elastic body 73 is stretched at the front end portion of the liquid absorbing structure 41. The decorative element 75 of the illustration sheet 76 takes a given form, and its outline becomes clear.

In the present embodiment, both side portions 44 of the covering sheet 43 forming the barrier cuff are disposed in the vicinity of the side edges 41c and 41d of the liquid absorbing structure 41. The size of the entire absorbent chassis 12 in the lateral direction X is reduced by the contraction of the front lower waist elastic body 73, and the free portions are tilted inward by the side portions 44 approaching each other, and the barrier cuff prevents leakage of excrement. If the latching area 68 of the tape fastener 20 is located on the both side portions 44, the side portions 44 are also pulled rearward together with the liquid absorbing structure 41, and the barrier cuff is moved to a predetermined position. Can stand up to height.

In the aspect in which the proximal portion 21 of the tape fastener 20 is located in the first elastic region 51 and the latching region 68 of the distal portion 22 is located in the front lower elastic region 72 as in this embodiment, For example, the rear waist elastic body 35 having a fineness of about 450 to 500 dtex is arranged in an extended state of about 2.6 times to form the first elastic region 51, and the front lower waist elastic body 73 having a fineness of about 450 to 500 dtex is formed. Is stretched about 2.0 times to form the front lower elastic region 72, so that the expansion and contraction rate and elongation stress of the first elastic region 51 are higher than those of the front lower elastic region 72. It is preferable to set to. In such a case, it is because the tape fastener 20 is pulled rearward in a state in which the tape fastener 20 is extended in the direction around the waist, and acts to expand the front end portion of the liquid absorbing structure 41 in the direction around the waist.

<Fourth embodiment>
Referring to FIGS. 13 to 15, in the present embodiment, an illustration sheet 76 having a front lower waist elastic body 73 and a plurality of decorative elements 75 is disposed in the front waist region 13. The front lower waist elastic body 73 crosses at least both sides of the absorbent chassis 12 and overlaps both sides of the liquid absorption structure 41 in a plan view, and is substantially disposed at the center of the liquid absorption structure 41. It has not been. In the region where the front lower waist elastic body 73 is disposed,

elastic regions

72A and 72B which are separated from each other in the lateral direction X and are opposed to each other, and an inelastic region 78 are defined between them. . The non-elastic region 78 can be defined by not fixing the central portion of the front lower waist elastic body 73 to the seat member, and cutting and snapping back a portion of the central portion in the extended state. As described above, the portion of the front lower waist elastic body 73 that intersects with the liquid absorption structure 41 is cut and removed, so that the absorption performance of the liquid absorption structure 41 by the contraction action of the front lower waist elastic body 73. Will not drop.

In the present embodiment, the tape fastener 20 is expanded, and the hooking area 68 is disposed on both side edges 41b and 41c of the liquid absorbing structure 41 in which the front lower waist elastic body 73 extends, whereby the liquid absorbing structure. It can suppress that a level | step difference arises in both the side edges 41b and 41c of 41, and its vicinity. Further, the

elastic regions

72A and 72B are positioned on both sides of the front waist region 13, so that the front waist region 13 is fitted to the wearer's body, and the tape fastener 20 includes the front lower waist elastic body 73 and the rear waist elastic body. Since it is pulled in the direction of the waist by the tensile stress of 35, the front and

rear waist regions

13 and 14 can be fitted to the wearer's body in a state in which both sides of the diaper 10 are dragged and adjusted in size.

<Fifth Embodiment>
Referring to FIGS. 16 and 17, in this embodiment, at the distal portion 22 of the tape fastener 20, between the proximal portion 21 and the latching area 68, more specifically, the second bent portion 56. An auxiliary sheet piece 80 formed of a separate sheet member is laminated on the base sheet 58 between the latching area 68. In the region where the base sheet 58 and the auxiliary sheet piece 80 are laminated, a highly rigid region having higher rigidity than the proximal portion 21 and the second distal portion 62 is formed.

As the auxiliary sheet piece 80, for example, a spunbond fiber nonwoven fabric having a mass of about 10 to 60 g / m ² , preferably about 20 to 40 g / m ² can be suitably used. Although the auxiliary sheet piece 80 may be formed from the same fiber nonwoven fabric as the base sheet 58, it is preferable that the mass of the base sheet 58 is larger than the mass of the auxiliary sheet piece 80 and has high rigidity. In the case where the mass of the base sheet 58 is smaller than the mass of the auxiliary sheet piece 80, when the gripping portion 63 is pulled, there is a difference in strength between the sheets between the proximal portion 21 and the auxiliary sheet piece 80. This is because the base sheet 58 may be broken. Further, by making the rigidity of the auxiliary sheet piece 80 lower than that of the base sheet 58, the outer surface of the laminated area of the auxiliary sheet piece 80 becomes relatively flexible in the laminated state of the tape fastener 20, and the touch becomes good.

When the base sheet 58 is formed of a fiber nonwoven fabric, the second distal portion 62 is warped by the force of pulling the distal portion 22 backward by the proximal portion 21, and the latching region 68 is formed in the front waist region 13. There is a risk of peeling from the outer surface. In the tape fastener 20 according to this embodiment, even if the whole is pulled rearward due to the contraction of the rear waist region 14 in the hooked state, a high rigidity region is provided between the proximal portion 21 and the hooking region 68. Is formed, the latching area 68 is stably latched on the outer surface of the front waist area 13, and there is no possibility that it will be released. That is, when the front and

rear waist regions

13 and 14 expand and contract in the direction around the waist, the tape fastener 20 is pulled in the direction around the waist, and the tape fastener 20 is deformed and both side edges are warped. In this way, when the side edge portions are warped, a peeling force acts on the latching area 68 and it is easy to peel off. By arranging a high-rigidity area between the proximal part 21 and the latching area 68, The force for deforming the tape fastener 20 can be dispersed and the deformation can be suppressed. Moreover, the side edge part of the diaper 10 in which the side seam 23 is located is laid down to the front waist area 12 side by hooking the tape fastener 20 to the front waist area 12. The fallen side edge applies an outward force to the first distal portion 61 that contacts and opposes it in an attempt to return to its original state, and tries to deform the distal portion 22 into a convex shape. . Although the distal portion 22 in the vicinity of the side edge portion 19 is deformed in this manner, a peeling force acts on the latching region 68, but the high rigidity region is between the side edge of the diaper 10 and the latching region 68. It is possible to suppress the deformation of the distal portion 22 by being located at the position, and to prevent the peeling force from acting on the latching area 68.

In order to exert such an effect, an auxiliary portion (a part of the first distal portion 61 and the second distal portion 62) located between the proximal portion 21 and the latching area 68 of the distal portion 22 is assisted. The sheet piece 80 may be arrange | positioned and the highly rigid area | region 81 may be formed. This is because, in the case of such an aspect, warping and deformation of the tape fastener 20 from the proximal portion 21 to the latching area 68 can be suppressed. The high-rigidity region may be positioned between the proximal portion 21 and the second temporary fixing portion 66, or may be positioned so that a part thereof overlaps with the latching region 68.

<Sixth Embodiment>
Referring to FIG. 18, in the tape fastener 20 according to the present embodiment, the base sheet 90 is bent in two, and both ends 90 a and 90 b are positioned on the side edge 19. The entire base sheet 90 or at least the distal portion 22 has elasticity, and the holding portion 63 of the tape fastener 20 is picked and pulled sideways or upward to separate the temporary fixing portion 69. By extending the latching area 68 so as to overlap the side edge 41d of the liquid absorbing structure 41 on the outer surface of the front waist area 13, a step in the vicinity of the side edge 41d of the liquid absorbing structure 41 can be suppressed. . When only the distal portion 22 of the base sheet 90 has elasticity, the proximal portion 21 and the distal portion 22 can be formed from different sheet materials, respectively.

<Seventh embodiment>
Referring to FIG. 19, the tape fastener 20 according to the present embodiment extends straight in the lateral direction X in a state where the base sheet 91 is not bent. The base sheet 91 includes both ends 91a and 91b, a proximal portion 93 fixed to the side portion 18 of the rear waist region 14 via the joining region 60, and a distal portion extending from the proximal portion 93 to the side edge portion 19 side. 94, and the entire base sheet 92 or at least a part of the distal portion 94 has elasticity. Also in this aspect of the tape fastener 20, the gripping portion 63 is picked and pulled sideways or upward as it is to separate the temporary fastening portion 69, and is extended so that the latching region 68 is absorbed on the outer surface of the front waist region 13. By arranging so as to overlap the side edge 41d of the liquid structure 41, a step in the vicinity of the side edge 41d of the liquid absorption structure 41 can be suppressed. When at least a part of the distal part 94 of the tape fastener 20 has elasticity, a part excluding the elastic part is formed of an inelastic sheet, and a part of the elastic distal part 94 is joined to them. The elastic sheet may be formed.

Each constituent material constituting the diaper 10 is limited to various known materials that are normally used in this kind of field in addition to the materials described in the present specification, unless otherwise specified. It can be used without. Moreover, the aspect in which the front waist region 13, the back waist region 14, and the crotch region 15 were formed in series may be sufficient as the diaper 10. FIG. In the present specification and claims, the terms “first”, “second” and “third” are used merely to distinguish like elements, positions and the like.

The disclosure relating to the present invention described above can be organized into at least the following matters.
It has a longitudinal direction and a transverse direction perpendicular thereto, and has a skin facing surface and a non-skin facing surface on the opposite side thereof, a first waist region that is one of the front and rear waist regions, and a second waist that is the other of the front and rear waist regions A crotch region located between the first and second waist regions, and a liquid-absorbing structure extending at least to the second waist region around the crotch region, and in the first and second waist regions In the disposable pants-type wearing article in which the side edges extending in the longitudinal direction are overlapped and joined to each other, and a tape fastener is attached in the vicinity of the side edge of the first waist area, the first and second waist areas At least the first waist region has elasticity in the lateral direction, and the tape fastener is fixed in the vicinity of the side edge of the first waist region. A proximal portion and a distal portion having a latching area for releasably latching the tape fastener to the non-skin facing surface of the second waist region, the latching region comprising the first It arrange | positions so that it may overlap with the side edge of the said liquid absorption structure in 2 waist region.

The present invention disclosed in the above paragraph 0054 can include at least the following embodiments. The embodiments can be adopted separately or in combination with each other.
(1) The tape fastener is made of a fiber nonwoven fabric.
(2) In the second waist region, at least a region where the hook region of the tape fastener is latched has elasticity in the lateral direction.
(3) The elongation stress in the elastic region of the first waist region is higher than the elongation stress in the elastic region of the second waist region.
(4) The elastic region of the second waist region is formed from a plurality of string-like or strand-like elastic members extending in the lateral direction between both side edges of the second waist region across the liquid absorption structure. It is formed.
(5) The elastic region of the second waist region is formed from a plurality of string-like or strand-like elastic members extending in the lateral direction, and from the side edge of the second waist region to the side edge of the liquid absorbing structure. And a pair of elastic regions positioned apart from each other in the lateral direction, and a non-elastic region is positioned between the pair of elastic regions.
(6) An illustration sheet having a decorative element visible from the outer surface is arranged in the area where the liquid absorbing structure is present in the second waist area, and the elastic member arranged in the second waist area is A center located between the both side regions of the liquid absorbing structure, which is located on the inner surface side of the illustration sheet and expresses an extensional stress in a portion overlapping the both side regions of the liquid absorbing structure in plan view. In the region, substantially no elongation stress is expressed.
(7) The first waist region has an upper elastic region to which the proximal portion of the tape fastener is fixed, and a lower elastic region located closer to the crotch region than the upper elastic region, and the upper elasticity The elongation stress in the region is higher than the elongation stress in the lower elastic region.
(8) The hooking area is formed of a hook sheet having a hook element of a mechanical fastener, and the KES bending rigidity in a direction in which both side edges of the tape fastener of the high-rigidity portion where the hooking area is located is brought close to each other. The value is about 0.56 to 1.8 gf · cm ² / cm.
(9) A barrier cuff having a standing tendency is provided in the vicinity of the side edge of the liquid absorption structure, and the latching area of the tape fastener overlaps with the barrier cuff in the second waist area in plan view. It is hung on.
(10) The tape fastener is temporarily fixed to the proximal portion via a temporary fixing portion in a state where the distal portion is bent, and the temporary fixing portion is spaced apart in the lateral direction. It has a 2nd temporary fix | stop part, and the said latching area is located in the inner surface of the said distal part between the said 1st and 2nd temporary fix | stop parts.
(11) A high-rigidity region having higher rigidity than the proximal portion is formed between the proximal portion of the distal portion and the latching region.
(12) The distal portion of the tape fastener has elasticity.

10 Disposable pants-type wearing articles (disposable diapers)
13 Front waist area (first or second waist area)
14 Rear waist area (first or second waist area)
DESCRIPTION OF SYMBOLS 15 Crotch area 20 Tape fastener 21 Proximal part 22 Distal part 28 Front waist elastic body 35 Back waist elastic body 41

Liquid absorption structure

41b, 41c, 41d Side edge 51 of liquid absorption structure 1st elastic area (elastic area)
X Horizontal direction Y Vertical direction

Claims

It has a longitudinal direction and a transverse direction perpendicular thereto, and has a skin facing surface and a non-skin facing surface on the opposite side thereof, a first waist region that is one of the front and back waist regions, and a second waist that is the other of the front and back waist regions A crotch region located between the first and second waist regions, and a liquid-absorbing structure extending at least to the second waist region around the crotch region, and in the first and second waist regions In the disposable pants-type wearing article in which the side edges extending in the vertical direction are overlapped and joined to each other, and the tape fastener is attached in the vicinity of the side edge of the first waist region,
At least the first waist region of the first and second waist regions has elasticity in the lateral direction,
The tape fastener includes a proximal portion fixed in the vicinity of the side edge portion of the first waist region, and a tape fastener fastened to the non-skin facing surface of the second waist region in a peelable manner. A distal portion having a latching area,
The wearing article, wherein the latching area is disposed so as to overlap with a side edge of the liquid-absorbing structure in the second waist area.
The wearing article according to claim 1, wherein the tape fastener is made of a fiber nonwoven fabric.
The wearing article according to claim 1 or 2, wherein in the second waist region, at least a region where the hook region of the tape fastener is latched has elasticity in the lateral direction.
The wearing article according to claim 3, wherein an extension stress of the elastic region of the first waist region is higher than an extension stress of the elastic region of the second waist region.
The elastic region of the second waist region is formed from a plurality of string-like or strand-like elastic members extending in the lateral direction between both side edges of the second waist region across the liquid absorbing structure. The wearing article according to claim 3 or 4.
The elastic region of the second waist region is formed from a plurality of string-like or strand-like elastic members extending in the lateral direction, and extends from a side edge of the second waist region to a side edge of the liquid absorbing structure. The wearing article according to claim 3 or 4, wherein the wearing article has a pair of elastic regions that are spaced apart from each other in the lateral direction, and an inelastic region is positioned between the pair of elastic regions.
An illustration sheet having a decorative element visible from the outer surface is arranged in the area where the liquid absorbing structure is present in the second waist area, and the elastic member arranged in the second waist area is the illustration. It is located on the inner surface side of the sheet, expresses elongation stress in a portion overlapping with both side areas of the liquid absorption structure in plan view, and in a central area located between the both side areas of the liquid absorption structure The wearing article according to claim 5 or 6, wherein substantially no elongation stress is expressed.
The first waist region includes an upper elastic region to which the proximal portion of the tape fastener is fixed, and a lower elastic region located on the crotch region side with respect to the upper elastic region, and the upper elastic region is elongated. The wearing article according to any one of claims 1 to 7, wherein a stress is higher than an extensional stress in the lower elastic region.
The hooking area is formed from a hook sheet having a hook element of a mechanical fastener, and a KES bending rigidity value in a direction in which both side edges of the tape fastener of the high-rigidity portion where the hooking area is located is close to each other, The wearing article according to any one of claims 1 to 8, which is about 0.56 to 1.8 gf · cm 2 / cm.
A barrier cuff having an upright orientation is provided in the vicinity of the side edge of the liquid absorption structure, and the latching area of the tape fastener is latched at a position where the barrier cuff and the barrier cuff overlap with each other in plan view in the second waist area. The worn article according to any one of claims 1 to 9.
The tape fastener is temporarily fixed to the proximal portion via a temporary fixing portion in a state where the distal portion is bent, and the temporary fixing portion is first and second temporary spaced apart in the lateral direction. The wearing article according to any one of claims 1 to 10, further comprising a stop portion, wherein the hooking region is located on an inner surface of the distal portion between the first and second temporary fastening portions.
The wearing according to any one of claims 1 to 11, wherein a high-rigidity region having higher rigidity than the proximal portion is formed between the proximal portion of the distal portion and the hooking region. Goods.
The wearing article according to any one of claims 1 to 12, wherein the distal portion of the tape fastener has elasticity.