JPH11188060A - Disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly leakage-proof disposable diaper that fits well, gives an user a good feeling of openness around one's legs and that is comfortable when it is put on. SOLUTION: The diaper 1 consists of top sheet 2, back sheet 3 and absorber 4 and it is composed of a main body to which elastic parts 61 for a leg are arranged and sheet 7 in which elastic parts 51 for waist are planted. The sheet 7 for attaching elastic parts is arranged as its both longitudinal sides are extended outward from the right and the left rims on the upper part of the main body. The main body consists of elastic parts 61 for a leg that are composed of the first elastic parts 62 for a leg and the second elastic parts 63 for a leg. The second elastic parts 63 for a leg is deformed toward the inner side of the diaper at its middle part further than at its both ends. Being fixed to the main body, solid guard 21 is formed at the right and the left side rims of the main body so as to let the belt-shaped, long and narrow leakage proof sheet 22 of which the one side rim 22a is arranged to elastic part 23 be free.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper having a good feeling of opening around the legs, a good fit and fit, and a good leak-proof property.

[0002]

2. Description of the Related Art Conventionally, a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retentive absorber interposed between the two sheets have been provided. The left and right side edges of the abdomen and the left and right side edges of the back side are joined to form a pair of left and right joints, and the waist and the leg respectively have a waist elastic member and Disposable diapers are widely used, in which a leg elastic member is provided, and a waist gather substantially formed in the waist portion is formed in the waist portion in a circumferential direction of the waist portion.

[0003] However, the conventional disposable diaper has a width in a central portion in a longitudinal direction (a crotch portion) in a deployed state of the diaper in order to improve the fitting property of a waist portion and a leg portion and to improve leak prevention performance. The crotch was curved so that the widths at both ends in the longitudinal direction (abdominal part and dorsal part) were wider than in the longitudinal direction. For this reason, the conventional pants-type disposable diaper has the following problems. That is, since the leg circumference portion covers the wearer's leg and the base of the leg more than necessary, it is hot and the wearing feeling is poor. In addition, since it is necessary to cut the member into a special shape at the time of manufacturing, the production process is complicated, the productivity is poor, and the cost is high. Such a problem is particularly noticeable in summer and in hot regions.

[0004] In short, the conventional disposable diaper is not excellent in both the leakage prevention property and the feeling of opening around the legs, but is excellent in the feeling of opening around the legs, the wearing feeling is good, and the leakage prevention property is also excellent. There is a demand for the development of disposable diapers.

Accordingly, it is an object of the present invention to provide a disposable diaper having a good feeling of opening around the legs, an excellent feeling of wearing, and an excellent leak-proof property.

[0006]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have formed a diaper with a rectangular diaper main body and a strip-shaped elastic member-attached sheet, and a diaper main body. It has been found that a disposable diaper in which three-dimensional gathers are provided on both left and right side edges can achieve the above object.

The present invention has been made based on the above findings, and comprises a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retentive absorber interposed between the two sheets. It is composed of a rectangular diaper main body on which the leg elastic member is disposed, and a narrow band-shaped elastic member-attached sheet on which the trunk elastic member is disposed, wherein the elastic member-attached sheet has at least a back side of the diaper main body. In the upper part to be constituted, both side parts are arranged so as to extend outward from left and right side edges of the diaper body, respectively, and the leg elastic member is provided along a longitudinal direction of the diaper body. A pair of first leg portion elastic members, and a pair of second leg portion elastic members provided inward of the diaper main body in the width direction of the diaper main body with respect to the pair of first leg portion elastic members. The leg elastic member The central portion is displaced inward in the width direction of the diaper main body from the end portion, and on the top sheets on the left and right side edges of the diaper main body, a narrow band-shaped protection member having an elastic member disposed on one side edge is provided. The other side edge is fixed to the side edge of the diaper body such that the one side edge is located inside the diaper body and is a free edge, and the one side edge is located above the top sheet. An object of the present invention is to provide a disposable diaper having a three-dimensional guard formed so as to stand upright.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to the drawings. Here, FIG. 1 is a perspective view showing one mode of the disposable diaper of the present invention, FIG. 2 is a development view of the disposable diaper shown in FIG. 1, and FIG.
FIG. 4 is an enlarged sectional view taken along the line III-IV of FIG. 2. FIG. 5 is a schematic diagram showing a use state of the disposable diaper shown in FIG.

The disposable diaper 1 of the present embodiment is shown in FIGS.
As shown in (1), a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and a liquid-retentive absorber 4 interposed between the two sheets are provided. The disposable diaper 1 according to the present embodiment includes the left and right side edges of the abdominal part A and the back part B.
This is a pants-type disposable diaper in which a pair of left and right joints 8 are formed by joining the left and right side edges.

The top sheet 2, the back sheet 3, and the absorber 4 used in the present embodiment can be formed using any of the materials conventionally used for forming these without any particular limitation. In addition, the above-mentioned “trunk” is a portion located around the waist (around the waist opening) and around the waist.

As shown in FIGS. 1 and 2, the disposable diaper 1 of the present embodiment includes the top sheet 2, the back sheet 3, and the absorber 4, and is provided with a leg elastic member 61. A diaper body 10 having a rectangular shape and a strip-shaped elastic member-attached sheet 7 on which a trunk elastic member 51 is disposed, and the elastic member-attached sheet 7 constitutes a back portion B of the diaper body 10. In the upper part B ', both side parts 70a' and 70b 'are arranged so as to extend outward from the left and right side edges 10a and 10b of the diaper main body 10, and extend along the longitudinal direction of the diaper main body 10. A pair of first leg elastic members 62 provided, and a pair of second leg elastic members 63 provided more inward in the width direction of the diaper main body 10 than the pair of first leg elastic members 62. Leg elastic member 61 made of Comprising, second leg portion elastic members 63, both ends 63a, middle than 63a 6
3b is displaced inward in the width direction of the diaper body 10,
On the top sheet 2 on the left and right side edges of the diaper main body 10, a narrow band-shaped leakage prevention sheet 22 having an elastic member 23 disposed on one side edge 22a is provided. The other side edge 22b is fixed to the side edge side of the diaper main body 10 so as to be positioned at the side and becomes a free edge, and the one side edge 22a is raised up toward the upper part of the top sheet 2. 21 are formed.

More specifically, as shown in FIGS. 1 and 2, the joint portion 8 includes both side edges 7a and 7b of the elastic member-attached sheet 7 of the abdominal portion A and the back side portion B. And both side edges 7a 'and 7b' of the elastic member-attached sheet 7
Each is formed by joining.

As shown in FIG. 2, the top sheet 2 and the back sheet 3 constituting the outer shape of the diaper main body 10 have substantially the same shape, respectively, and the absorber 4 is formed of the top sheet. It has a rectangular shape slightly smaller than 2 and the back sheet 3 and is bonded to both sheets via an adhesive. Also, the elastic member-attached sheet 7
In the lower part A 'constituting the abdominal part A, both side parts 70a and 70b are respectively provided with the side edges 10 of the diaper main body 10.
a, 10b so as to extend outward. The elastic member-attached sheet 7 has a two-layer structure in which a wide sheet is folded in half at the center line in the width direction, and has a narrow band shape as a whole. Further, the elastic member-attached sheet 7 is sandwiched and fixed between the top sheet 2 and the back sheet 3 so that the edge thereof is along the edge of the diaper main body (see FIG. 3). width W ₁ of 7, the length L ₁ of the diaper body 10, the length of the diaper body 10 L ₁
Is preferably 5 to 25, when 100 is used. The length L ₁ of the diaper body 10 may preferably be 350～500Mm, the width W of the elastic member attached sheet 7
₁ is preferably 30 to 100 mm. The width W ₁ of the elastic member-attached sheet 7 is substantially equal to the width of the body 5. In the case of using a disposable diaper of the present invention is used for an adult, the length L ₁ may be a maximum of 1000 mm, also the width W ₁ may be up to 200 mm. Extension length L of the elastic member-attached sheet 7
_2, the width W ₂ of the diaper body 10, preferably with 30 to 200 when the width W ₂ of the diaper main body 10 and 100. Also, extending length L ₂ of the elastic member attached sheet 7 may preferably be 35～100Mm,
The width W ₂ of the diaper main body 10 is preferably set to 30 to 100 mm.

As shown in FIGS. 2 and 3, the body elastic member 51 is bonded between two layers of elastic member-attached sheets via an adhesive. Six are provided at substantially equal intervals over the entire area. Spacing D ₁ of the between the above waist elastic member 51, 3-2
Preferably, it is 0 mm.

As shown in FIG. 4, the first leg elastic member 62 is provided at the right and left side edges of the diaper main body 10 at locations where the absorber A is not present.
The two sheets are arranged along the longitudinal direction 0, and are sandwiched and fixed between the top sheet 2 and the back sheet 3. In addition, the second leg elastic member 63 is configured as shown in FIG.
As shown in FIG. 5, three diapers are arranged in a bent line at the central portion 63b such that the central portion 63b located at the center of the crotch C of the diaper is a bending point. The second leg elastic member 63 is disposed so as to be located between the back sheet 3 and the absorber 4. The first leg elastic member 62 and the second leg elastic member 63 form a triangular shape. Further, the absorber 4 is provided between the first leg elastic member 62 and the second leg elastic member 63. The first leg elastic member 62
And the second leg portion elastic member 63, as shown in FIG.
In both cases, both ends are arranged so that they do not overlap with the elastic member-attached sheet 7 or even if they overlap, their ends slightly overlap. That is, the first and second leg portion elastic members 62 and 63 are connected to the first and second leg portions.
Arrangement is made such that the elastic members 62 and 63 do not apply elastic force in the longitudinal direction of the diaper to the elastic member-attached sheet 7 so that gathers are not formed. preferable.

The first leg portion elastic member 62 and the second leg
The distance D ₂ (see FIG. 4) at the center of the crotch C with the leg elastic member 63 is preferably 5 to 150 mm. The distance D ₃ between the second leg elastic members 62 and 63 at the center of the crotch C (see FIG. 2) is −15.
It is preferred to be 0 to 150 mm. (Note that-indicates each second
(This is the case where the leg elastic members 63 and 63 intersect.)

The joint portion 8 is formed so that the top sheet 2 side of each elastic member-attached sheet 7 abuts against each other.
The side edges 7a 'and 7b' are formed by joining the side edges 7a and 7b. By being joined in this manner, the gather of the torso 5 on the abdominal part A and the gather of the torso 5 on the dorsal part B are connected to form a substantially continuous gather. Formed.

Here, as the elastic member-attached sheet 7, a sheet made of the following forming material can be preferably exemplified. A nonwoven fabric, a film, a cloth, or the like is used, and a nonwoven fabric is particularly preferable in terms of breathability and softness.

The torso elastic member 51 and the first and second members are also provided.
The two leg elastic members 62 and 63 are usually disposable.
Anything used for diapers can be used without any restrictions
Although the thickness of the body elastic member 51 can be
0.1 to 0.5 mm, preferably the first leg
The thickness of the part elastic member 62 should be 0.1 to 0.5 mm.
Preferably, the thickness of the second leg elastic member 63 is
Preferably, it is 0.1 to 0.5 mm. Further, the torso
The elastic modulus of the elastic member 51 is 1.0 to 5.0 × 10 ⁶Pa and
Preferably, the elasticity of the first leg elastic member 62 is adjusted.
The power factor is 1.0 to 5.0 × 10⁶Pa is preferred
The elastic modulus of the second leg elastic member 63 is 1.0
~ 5.0 × 10⁶It is preferably Pa. The above elasticity
The rate is measured as follows. Elastic modulus
Is "Rheometer DMS200" (Seiko Instrument
Measured by an ordinary method using the following method. Each first and
The extension ratio of the second leg elastic member is 20 to 300%.
Preferably.

As shown in FIGS. 2 and 4, the three-dimensional guard 21 includes a narrow band-shaped leak-proof sheet 22 and a diaper main body 10.
Are formed on the top sheet 2 at the left and right side edges. The other side edge 22b of the leakage prevention sheet 22 is fixed via an adhesive on the side edge side of the diaper main body 10, and the one side edge 22a is not fixed but is a free edge. An elastic member 23 is disposed on the one side edge 22a, and the three-dimensional guard 21 is erected upward by contraction of the elastic member 23.

The one side edge 22a, which is a free edge in the three-dimensional guard 21, is connected to the diaper main body 1.
At the center of the crotch C of the zero leg portion, it is located between the first leg elastic member 62 and the second leg elastic member 63. At this time, as shown in FIG. 4, the distance D ₄ from the one side edge 22a in the central portion of the crotch portion C of the diaper main body 10 to the first leg portion elastic member 62, and 10~70mm Is preferred.

As the leak-proof sheet and the elastic member, those usually used as three-dimensional guards for disposable disposable diapers can be used without any particular limitation.

The disposable diaper 1 of the present embodiment can be used in the same manner as a commonly known disposable diaper. Specifically, as shown in FIG. 5, it can be mounted and used in the same manner as a conventional disposable diaper. And since the disposable diaper 1 of this form is equipped with the above-mentioned structure, it is excellent in the feeling of opening around the leg R. Also, since the first and second leg elastic members 62 and 63 are provided,
Even if the configuration is excellent in the open feeling of the leg circumference R, the fit is not impaired. Furthermore, since it has the above-mentioned three-dimensional gathers, it is excellent in leak prevention.

Further, the disposable diaper 1 of the present embodiment is similar to that of FIG.
As shown in FIG. 3, the user has three disposable diaper bodies 1 at the crotch C and one at the abdominal part A and the part at the lower abdomen of the dorsal part B, respectively.
The pocket portions 9a and 9b in which 0 is undulated in a convex shape outward.
9c is formed. That is, the disposable diaper 1 of the present embodiment
The first and second leg elastic members 62 and 63 and the torso elastic member 51 are used to form pockets in the abdominal part A and the back part B, respectively, at positions located on the lower abdomen of the wearer. The first and second leg elastic members 62, 63 form pockets 9b, 9c in the crotch C located at the wearer's crotch when worn. It has been made. And, due to the presence of the pockets 9a, 9b, 9c,
Further, leak prevention is improved. In the conventional disposable diaper having three-dimensional gathers, the three-dimensional gathers were pushed to the top sheet side when attached and did not function as three-dimensional gathers. However, as shown in FIG. Inside the pocket portion 9c located at the inseam, the three-dimensional gather 21
Is located between the first leg elastic member 62 and the second leg elastic member 63, the three-dimensional gathers 21 stand up, and the free edge is placed on the skin of the wearer. In order to make good contact and to sufficiently perform the function as a three-dimensional gather, the leakage prevention performance is further improved.

As described above, the disposable diaper 1 of the present embodiment is
By providing the above-described configuration, when the leakage prevention property is improved, the feeling of opening around the legs is reduced, and the feeling of opening around the legs is better than that of a conventional disposable diaper in which the feeling of wearing is deteriorated. As a result, it is possible to improve the feeling of wearing, and to exhibit a fitting property and a leak preventing property which are equal to or higher than those of conventional disposable diapers.

The disposable diaper 1 of the present embodiment can be preferably manufactured as follows. That is, after disposing the first and second leg portion elastic members 62 and 63 on the top sheet 2, the absorber 4 is placed, and
Separately, the elastic member-attached sheet 7 formed by disposing the trunk elastic member 51 is disposed on the top sheet 2, and the back sheet 3 is disposed so as to cover the absorber and the elastic member-attached sheet 7. Thus, the diaper main body 10 on which the elastic member-attached sheet 7 is disposed is formed. Next, the three-dimensional guard is formed by arranging the leak-proof sheet 22 in which the elastic member 23 is disposed on one side edge 22a on both left and right side edges of the diaper main body 10, and from the diaper main body 10 in the elastic member attached sheet 7 The extended portions are respectively joined by heat sealing or the like, so that the disposable diaper of the present embodiment can be obtained.

It should be noted that the disposable diaper of the present invention is not limited to the above-described embodiment, but can be variously modified without departing from the spirit of the present invention. For example, the second leg elastic member 63 may be disposed so as to be located between the top sheet 2 and the absorber 4. Also, in the above embodiment,
Although the pants-type disposable diaper has been described by way of example, the present invention can also be applied to a so-called deployable disposable diaper having a fastening tape for fastening the disposable diaper. Further, in the above-described embodiment, an example in which the absorber is present between the first leg elastic member and the second leg elastic member has been described. However, the absorber may not be present.

[0028]

According to the disposable diaper of the present invention, the feeling of opening around the legs is good, the feeling of wearing is excellent, and the leak preventing property is also excellent.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of the disposable diaper of the present invention.

FIG. 2 is a development view of the disposable diaper shown in FIG.

FIG. 3 is an enlarged sectional view taken along line III-III of FIG. 2;

FIG. 4 is an enlarged sectional view taken along the line IV-IV in FIG. 2;

FIG. 5 is a schematic diagram showing a use state of the disposable diaper of the present invention.

FIG. 6 is an enlarged view of the inside of a portion VI in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Top sheet 3 Back sheet 4 Absorber 5 Body 6 Leg part 7 Elastic member attached sheet 70a, 70b, 70a ', 70b' Side part 8 Joint part 10 Diaper main body 10a, 10b Side edge 21 Solid guard 22 Leak-proof sheet 22a One side edge 22b Other side edge 23 Elastic member 51 Body elastic member 61 Leg elastic member 62 First leg elastic member 63 Second leg elastic member A Belly side B Back side part C Inseam

Claims (1)

[Claims] 1. A rectangular diaper comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retentive absorber interposed between the two sheets, and a leg-shaped elastic member is provided. A main body and a strip-shaped elastic member-attached sheet provided with a body elastic member, wherein the elastic member-attached sheet has at least an upper portion constituting a back side portion of the diaper main body, and two side portions thereof. It is arranged so as to extend outward from both left and right side edges of the diaper body, the leg elastic member, a pair of first leg elastic members provided along the longitudinal direction of the diaper main body, The diaper main body comprises a pair of second leg elastic members provided more inward in the width direction of the diaper main body than a pair of the first leg elastic members, and the second leg elastic member is more central than both end portions thereof. The part is inward in the width direction of the diaper body Are displaced, on the top sheet of the left and right sides edge of the diaper body,
Each of the narrow band-shaped leakproof sheets provided with an elastic member on one side edge is provided with a side edge portion of the diaper main body, the other side edge being located inside the diaper main body and being a free edge. A disposable diaper, wherein the three-dimensional guard is formed so that the one side edge rises toward the upper side of the top sheet.