KR100831245B1 - Disposable diaper - Google Patents

Abstract

Disclosed is a disposable diaper in which the width of the opening through the stool storage space is hard to change.

The disposable diaper 1 has a perforation hole 26 in the inner sheet 22 in contact with the diaper wearer's skin to the space 46 for stool storage. The inner sheet 22 is formed with an elastic region 40 extending in the front and back directions Y along the side edge 31 of the transmission hole 26. In the crotch region 6 of the diaper 1, the inner sheet 22 has a width of the inner sheet 22 between the edge 3 of the diaper 1 and the side edge 31 of the perforation hole 26. A rigid sheet member 51 that suppresses deformation in the direction X is attached.

Description

Disposable Diapers {DISPOSABLE DIAPER}

The present invention relates to a disposable diaper having a space for stool storage.

A disposable diaper having a stool storage, wherein a perforation is formed in the area under the crotch of the inner sheet in contact with the skin of the diaper wearer, and is passed through the perforating hole between the inner sheet and the outer sheet in contact with the wearer of the diaper. It is known to form a space that functions as a stool reservoir and to wear the penetrating hole coincident with the anus of the diaper wearer.

For example, US Pat. No. 4,990,147 (Patent Document 1) discloses a disposable diaper having a liquid impermeable back sheet, a liquid permeable liner, and a body fluid absorbent core interposed therebetween. The liner is formed with a perforation hole through which a side passes and reaches the core, and the side does not soil the diaper wearer's skin. The liner is at least partially formed of an elastic panel and can adhere the periphery of the permeation aperture around the anus. For the elastic panel of the diaper, a nonwoven fabric made of polyurethane elastic yarn or a knitted fabric made of inelastic yarn can be used.

In addition, WO 03/009795 A1 (Patent Document 2) is a disposable diaper shown in the stretched state in FIG. 8 and shown in the contracted state in FIG. 9, wherein the back sheet 126 and the slit-like opening through which the side can pass. Disposable diapers are disclosed having a space 175 serving as a stool reservoir between the top sheets 124 on which 130 is formed. In each of the edges on both sides of the slit-like opening 130, elastic band members are joined to the top sheet 124 in an extended state, so that elastic regions 131 and 132 extending in the front and rear directions in parallel to the center line X are formed. have. The elastic region 131 extends at an angle so as to be spaced apart from the center line X toward the front torso region 136 at an angle toward the elastic region 143 and to the rear torso region 138. Connected to the elastic region 145, the elastic region 132 extends obliquely to be spaced apart from the centerline X toward the front body circumference region 136 and the center line toward the rear body circumference region 138. And an elastic region 146 extending obliquely apart from (X). These elastic regions 131, 143, 145 and the elastic regions 132, 144, 146 facing each other with the center line X interposed almost X-shaped as a whole. When the diaper is worn, the slit-like opening 130 is matched to the anus.

[Patent Document 1] US Patent No. 4,990,147

[Patent Document 2] WO 03/009795 A1

An elastic sheet can be used for the liner of the diaper in patent document 1, and the top sheet of the diaper in patent document 2. As one of the elastic sheets, a nonwoven fabric made of elastic yarn such as polyurethane elastic yarn can be used. However, this nonwoven fabric is often avoided by the mother because it gives a rubbery texture to the skin. In addition, as another elastic sheet, there is a knitted fabric made of inelastic yarn, which is too expensive for use in disposable diapers. On the other hand, according to Patent Document 2, by attaching an elastic band member to a nonwoven fabric made of inelastic yarn, the nonwoven fabric can be partially elasticized. The top sheet of FIG. 8 made of a partially elasticized nonwoven fabric in this manner does not give a rubbery feel when inelastic yarn is used, but the width of the slit-like opening when the elastic band member contracts and FIG. 9 becomes a state. At the same time as (W) changes, a large number of irregular and large wrinkles 150 occur in the crotch region. The change in the width W of the slit-like opening is that it is difficult to determine the position of the slit-like opening edge on both sides of the anus when the diaper is worn, and the width W of the opening is very narrow, It is not desirable to cover the skin of a diaper wearer with a top sheet near the anus to protect the skin from being soiled over a wide range. In addition, the occurrence of a large number of wrinkles also means that the adhesion of the top sheet to the skin is deteriorated, and the excrement easily leaks from the edge of the slit-like opening, or the appearance of the worn diaper is deteriorated. This invention makes it a subject to improve on the disposable diaper of a prior art so that such a problem may be solved.

In order to solve the above problems, the invention according to claim 1 targets the area under the crotch, the front body circumference region formed in front of the crotch region, and the rear body circumference region formed behind the crotch region. A body covering area is formed, an inner sheet which forms an inner surface of the body covering area and contacts the skin of the diaper wearer, an outer sheet which forms an outer surface of the body covering area and contacts the wearer's clothing, and these inner surfaces A body fluid absorbing portion positioned between the sheet and the outer sheet, wherein the inner sheet is spaced apart from the outer sheet and the body fluid absorbing portion in the thickness direction of the inner sheet in a width direction central portion of the crotch region; And dividing the width of the area under the crotch into the inner sheet. A through hole extending back and forth toward the front body circumference region and the rear body circumference region on a line is formed, and extends back and forth along both edges of the through hole parallel to each other with the centerline therebetween; It is a disposable diaper having an elastic region comprising an elastic member that is attached to the elongated state consisting of a portion extending from the center line toward each of the front and rear body circumferential region from each of the front and rear both ends of the portion.

In such a disposable diaper, the present invention is characterized in that the inner sheet in the crotch region has a side edge of the diaper and a side edge of the perforation hole extending back and forth in the crotch region. In between, the area | region which raises bending rigidity which suppresses the deformation | transformation of the said inner surface sheet to the diaper width direction is formed.

In one embodiment with which this invention is preferable, the area | region which raises the said bending rigidity is formed intermittently in the said front-back direction.

In another of preferable embodiment, the area | region which raises the said bending rigidity is formed by joining the sheet member separate from the said inner surface sheet to the said inner surface sheet.

In another one of the preferable embodiments, the area | region which raises the said bending rigidity is formed by apply | coating hot melt adhesive to the said inner surface sheet.

In still another preferred embodiment, the inner sheet is a nonwoven fabric formed of thermoplastic synthetic fibers, and a region for increasing the bending rigidity is a film-like portion formed by partially melting and solidifying the nonwoven fabric.

In yet another of the preferred embodiments, the region that increases the bending stiffness is a wrinkle that repeats regular ups and downs back and forth.

1 is a partially broken plan view of a disposable diaper in an extended state;

FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1. FIG.

3 shows a cross section of the inner sheet along line III-III of FIG. 1.

4 is a view of the same type as FIG. 3 showing an example of the embodiment.

FIG. 5 is a view of the same type as FIG. 3 showing another example of the embodiment; FIG.

FIG. 6 is a view of the same type as FIG. 3 showing another example of the embodiment. FIG.

FIG. 7 is a view of the same type as FIG. 3 showing another example of the embodiment; FIG.

8 is a partially broken plan view of a diaper of the prior art in an extended state;

9 is a perspective view of the diaper of FIG. 8 in a retracted state.

<Explanation of symbols for the main parts of the drawings>

1: disposable diaper

3: side edge of diaper

22: inner sheet

23: exterior sheet

24: body fluid absorption unit

26: through hole

31: side edge of the through hole

46: space

48: elastic member (elastic band member)

51: rigidification means (rigidized sheet member)

60: hardening means (hot melt adhesive)

61: hardening means (part on a film)

62: hardening means (wrinkle)

X: width direction (landscape direction)

Y: forward and backward

Referring to the attached drawings, the details of the disposable diaper according to the present invention will be described below.

1 is a partially broken plan view of the disposable diaper 1, wherein the diaper 1 is extended in the front and back directions Y of the diaper 1 in the longitudinal direction of the drawing, and in the transverse direction X of the diaper 1. It has a crotch region 6 in the center of the front and rear direction (Y), and has a front torso region 7 and a rear torso region 8 at the front and rear of the crotch region 6. The diaper 1 also has a body portion 2 which is rectangular in the figure, and the front body circumferential region 7 has a front wing extending outwardly from each of the side edges 3 of the body portion 2. 11) is formed, and a rear wing 12 extending outward from each of the side edges 3 is formed in the rear trunk circumferential region 8. A fastening tape 13 is attached to the rear wing 12, and an adhesive region 14 is formed on the inner surface of the fastening tape 13.

The body portion 2 has two circumferential edges 3 extending in the front and back direction Y of the diaper 1, and in the horizontal direction X in the drawing, which is the width direction of the diaper 1 orthogonal to them. It consists of an extending front edge 16 and a trailing edge 17 and has an inner sheet 22 in contact with the diaper wearer's skin and an outer sheet 23 in contact with the diaper wearer's wear. The inner sheet 22 is formed with a long through hole 26 in the front and back directions on the center line CC that bisects the width of the diaper 1, and between the two sheets 22 and 23 inside the through hole 26. The body fluid absorbing portion 24 interposed therebetween is excluded. The periphery of the permeation hole 26 is a pair of side edges 31 extending in the front and rear direction (Y) substantially parallel to the centerline CC, and the leading edge 32 and the rear edges, which are almost V-shaped and inverted V-shaped. It is formed by 33. The front strip member 28 and the rear strip member 29 which extend in the horizontal direction X are joined to the skin contact surface 27 of the inner sheet 22 along the front edge 16 and the rear edge 17. It is. The inner sheet 22 also has an elastic region 40, which elastic region 40 extends almost straight along the centerline CC at the side edge 31 of the transmission hole 26. And a front portion 37 extending from the vicinity of the front edge 32 of the through hole 26 toward the front strip member 28 so as to be spaced apart from the center line CC, and the back of the through hole 26 so as to be spaced apart from the center line CC. It consists of a back portion 38 extending from the edge 33 toward the rear strip member 29.

FIG. 2 is a view showing a cut along the line II-II located on the center line D-D which bisects the dimension of the diaper 1 in the front-back direction Y. FIG. The inner sheet 22 and the outer sheet 23 overlap each other along the side edge 3 and the front and rear end edges 16 and 17 (see Fig. 1), and are joined to each other by bonding or welding. Moreover, in the part where these sheets 22 and 23 overlap and are joined, the leg circumferential elastic member 41 joined by at least one of the sheets 22 and 23 with a hot melt adhesive (not shown) is carried forward and backward direction (Y). Extend in a stretched state. The body fluid absorbing portion 24 interposed between the inner sheet 22 and the outer sheet 23 is composed of a core material consisting of pulverized pulp, a mixture of pulverized pulp and high absorbent polymer particles, a mixture of pulverized pulp and high absorbent polymer fibers, and the like. The sheet 42 is coated with a sheet 43 made of tissue paper and / or nonwoven fabric, and is bonded to the outer sheet 23 via a hot melt adhesive 45 (see FIG. 2). The inner sheet 22 is formed with respect to the outer sheet 23 and the body fluid absorbing portion 24 except for the portions bonded to the outer sheet 23 at the side edges 3 and the front and rear end edges 16 and 17. The space 46 which is not joined but functions as a side storage between the outer sheet 23 is formed. The permeation hole 26 formed in the inner sheet 22 leads to the space 46, and can guide the feces and urine excreta to the space 46. In the vicinity of the side edge 31 of the transmission hole 26, the elastic band member 48 is attached to the non-skinned contact surface 47 of the inner sheet 22 in an extended state through a hot melt adhesive (not shown). As a result, the elastic region 40 is formed. A non-skinned contact surface 47 is also provided with a stiffening sheet member 51 (see FIG. 1) extending in the lateral direction X between the elastic region 40 and the side edge 3 by adhesion or welding. have. The stiffening sheet member 51 acts to partially increase the rigidity of the inner sheet 22, so that wrinkles occur in the inner sheet 22 when the elastic region 40 extends or contracts in the front and back directions Y. As a result, the width of the inner sheet 22 between the side edge 3 of the diaper 1 and the side edge 31 of the transmission hole 26 in the crotch region 6 as a result of wrinkles. It can prevent that it becomes small in this arrow P direction. That is, the width W between the side edges 31 and 31 of the transmission hole 26 does not change greatly due to the elastic region 40 extending or contracting, and is almost always before and after wearing the diaper 1. It can keep a constant value. This side edge 31 can be reliably positioned near the anus when the diaper 1 is worn. The rigid sheet member 51 is also intermittently attached to the inner sheet 22 in the front and rear directions Y of the crotch region 6, so that the elastic region 40 contracts in the front and rear directions Y. When the elastic region 40 is retracted, it is relatively long in the transverse direction (X) and the undulation in the front and rear directions (Y) between the adjacent rigid sheet members 51. The inner wrinkles help to form the sheet 22. When the diaper 1 is worn, the diaper 1 has a good appearance, having wrinkles in which the shape is arranged in the crotch region 6.

In the diaper 1 having such a configuration, the inner sheet 22 is formed of a sheet of liquid permeable and non-stretchable nonwoven fabric, woven fabric, open plastic film, or the like. The outer sheet 23 is formed of a sheet of liquid impermeable, more preferably liquid impermeable and breathable woven fabric, nonwoven fabric, plastic film or the like. As the elastic member 48, a member having a width of 2 to 20 mm is used as the member of the natural rubber or synthetic rubber. The front stripe member 28 and the rear stripe member 29, as necessary, to prevent the front and rear trunk circumferential regions 7 and 8 from shrinking in the transverse direction X under the influence of the elastic strip member 48 in an extended state. It is formed by a nonwoven fabric having a basis weight of 30 to 400 g / m 2, a flexible plastic sheet having flexibility and elasticity. Although the dimension of the permeation hole 26 in the inner sheet 22 depends on the size of the diaper, it is preferable that the width W is 10 to 70 mm, and the length extends from the anus of the diaper wearer to the yoke. .

3 is a cross-sectional view of the inner sheet 22 cut along the line III-III of FIG. 1. The band-shaped rigid sheet member 51 attached to the non-skin-contacting surface 47 of the inner sheet 22 has an elastic band member (from the side edge 3 having a dimension in the transverse direction X of the diaper 1). 48) and a sheet member such as a woven fabric, a nonwoven fabric, a plastic film, a flexible plastic sheet having flexibility and elasticity, having a dimension of 2 to 20 mm in the front and rear direction (Y). have. It is preferable that the space | interval in the front-back direction Y of the adjacent rigid sheet members 51 is 2-50 mm.

4, 5, 6 and 7 are the same drawings as FIG. 3 which shows an example of embodiment of this invention. In FIG. 4, instead of the rigidized sheet member 51 of FIG. 3, a hot melt adhesive 60 applied to the inner sheet 22 in a band shape in the horizontal direction X is used. The strip | belt-shaped hot melt adhesive 60 is intermittently arranged in the front-back direction (Y). In Fig. 5, instead of the rigid sheet member 51, the inner sheet 22 formed of a nonwoven fabric made of thermoplastic synthetic fibers is partially melted and solidified so that a portion 61 made of a film form intermittently in the front and rear directions (Y). It is. The portion 61 made of a film form extends in the horizontal direction X of the diaper 1 in the same manner as the rigid sheet member 51, and the portion of the nonwoven fabric that remains unfilmed between the portions 61 and 61. It has higher rigidity than. In FIG. 6, a plurality of wrinkles 62 are formed on the inner sheet 22 to repeat the regular ups and downs in the front and back directions Y. As shown in FIG. The peaks and valleys of the pleats 62 act in the same manner as the rigid band members 51 and the filmed portions 61. In FIG. 7, the inner sheet 22 forming the corrugation 62 is folded and stacked, and the inner sheet 22 is joined by bonding or welding in the portion 66 where the inner sheets 22 overlap.

According to the present invention, even when the elastic member attached to the inner sheet of the diaper is stretched or shrunk, it becomes possible to manufacture a disposable diaper having a space for side storage where the width of the opening is hard to change.

[Effects of the Invention]

In the invention according to claim 1, the area under the crotch of the inner sheet is formed to increase the bending stiffness in the diaper width direction of the inner sheet and to suppress the deformation of the inner sheet in the diaper width direction. Underneath the crotch, even if the elastic member in the stretched state extends along the centerline of the diaper at each side edge of the perforated hole formed in the crotch region of the inner sheet, and at an angle so as to be spaced apart from the centerline toward each of the front and back torso circumferential regions. The inner sheet in the region rarely moves in the width direction of the diaper, and the width between both edges in the through hole does not change significantly.

According to the invention of the aspect of Claim 2 to 6, the area | region which raises the bending rigidity of an inner sheet is an intermittent bonding of the sheet member with which it differs with respect to an inner sheet in the front-back direction of a diaper, and the width direction of a diaper with respect to an inner sheet. Forming intermittently the application region of the hot melt adhesive extending in the front and back directions of the diaper, and forming a plurality of wrinkles which repeat the regular undulation in the front and back directions of the diaper with respect to the inner sheet.

Claims (6)

A body covering region is formed by the under crotch region, the front torso circumference region formed in front of the crotch region, and the back torso region formed at the back of the crotch region, and forms an inner surface of the body covering region to form a diaper. An inner sheet in contact with the wearer's skin, an outer sheet forming the outer surface of the body covering area and contacting the wearer's clothing, and a body fluid absorbing portion located between the inner surface and the outer sheet, the width of the area under the crotch The inner sheet is spaced apart from the outer sheet and the body fluid absorbing portion in the thickness direction of the inner sheet in a direction central portion to form a stool storage space, and the inner sheet has a centerline dividing the width of the area under the crotch. Extending back and forth toward the front torso circumferential region and to the rear torso circumferential region A through hole leading to the space, and extending from the front and rear ends of the part and the front and rear ends of the part toward the respective front and rear body circumferential regions, respectively, on both side edges of the transmission hole parallel to each other with the center line therebetween. A disposable diaper having an elastic region comprising an elastic member attached to a stretched state and consisting of a portion extending away from the centerline, The inner sheet in the crotch region has a bending rigidity in the diaper width direction of the inner sheet between the side edge of the diaper and the side edge of the transmission hole extending in the back and forth direction in the crotch region. The height of the disposable diaper, wherein the region extends intermittently in the width direction and in the front and rear directions, whereby the region that increases the bending stiffness suppresses deformation of the inner sheet in the width direction. delete The disposable diaper according to claim 1, wherein an area for increasing the bending rigidity is formed by bonding a sheet member separate from the inner sheet to the inner sheet. The disposable diaper according to claim 1, wherein an area for increasing the bending rigidity is formed by applying a hot melt adhesive to the inner sheet. The disposable diaper according to claim 1, wherein the inner sheet is a nonwoven fabric formed of thermoplastic synthetic fibers, and a region for increasing the bending rigidity is a film-like portion formed by partially melting and solidifying the nonwoven fabric. 2. The disposable diaper of claim 1 wherein the region that increases the bending stiffness is a pleat that repeats regular ups and downs back and forth.

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