JP3897488B2 - Disposable diapers - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pants-type disposable diaper that is excellent in leakage prevention and fitting properties, and that can be manufactured at a low cost by suppressing the number of parts required for manufacturing.
[Prior art and problems to be solved by the invention]
[0002]
In the disposable diaper, since it is an important issue to effectively prevent leakage, various types of three-dimensional guards have been proposed on the left and right sides of the absorber.
Such a three-dimensional guard fits to the wearer by raising its free edge toward the upper side, forms a pocket between the three-dimensional guard and the top sheet, and temporarily stores excrement in the pocket. It prevents the excrement from flowing on the surface of the top sheet and causing leakage.
In order to prevent leakage, it is also important to improve the fit around the leg, and a technique for improving the fit around the leg by arranging an elastic member around the leg is also known. .
However, in the conventional disposable diaper, the sheet material for forming the three-dimensional guard is prepared as a separate member from the sheet material to which the elastic member around the leg is fixed. It was fixed on the surface side of the absorber.
Therefore, in the disposable diaper, the manufacturing process is complicated, and it is difficult to reduce the manufacturing cost.
[0003]
Accordingly, an object of the present invention is to provide a disposable diaper that is excellent in leakage prevention properties and fit properties, and that can be manufactured at a low cost by suppressing the number of parts required for manufacturing.
[0004]
[Means for Solving the Problems]
The present invention includes a substantially vertically long absorbent main body having a liquid permeable top sheet, a liquid impermeable leak-proof sheet, and a liquid retaining absorbent, and a back side of the absorbent main body. In a pants-type disposable diaper provided with a waist opening and a pair of leg openings, the sheet-like member extends outward along the side edge of the absorber. And an elastic member is disposed on the flap portion along the longitudinal direction thereof, and a part of the elastic member is disposed at the central portion in the longitudinal direction of the absorbent main body. The flap part is provided with a disposable diaper in which both end portions in the longitudinal direction are folded back to the surface side of the absorbent main body and the folded part is fixed together with the elastic member. To achieve the above objectives It is intended.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of the disposable diaper of the present invention will be described.
The disposable diaper 1 of 1st Embodiment has the liquid-permeable surface sheet 21, the liquid-impermeable leak-proof sheet 22, and the liquid-retaining absorber 23, as shown in FIGS. In particular, a longitudinally long absorbent main body 2 and a sheet-like member 3 disposed on the back side of the absorbent main body 2 are provided. The side edges A1, B1 and A2, B2 of the respective back side portions B are joined to form the waist opening 4 and the pair of leg openings 5, 5.
[0006]
The absorbent main body 2 is formed by sandwiching and fixing the absorber 23 between the top sheet 21 and the leak-proof sheet 23. Moreover, the absorber 23 has an hourglass shape with a narrowed center in the longitudinal direction. The top sheet 21 and the leak-proof sheet 22 have an outer dimension larger than that of the absorber 23 and are joined to each other at an extending portion that extends in the width direction and the longitudinal direction of the absorber 23.
[0007]
The absorptive main body 2 is arranged so as to extend between both ends of the diaper so that the longitudinal direction thereof coincides with the longitudinal direction of the disposable diaper.
On the back side of the absorbent main body 2, a sheet-like member 3 for fixing an elastic member and an outer layer sheet 6 are arranged in this order.
The sheet-like member 3 is a rectangular sheet having a width wider than that of the absorber 23, and the longitudinal direction of the sheet-like member 3 is aligned with the longitudinal direction of the absorbent main body 2.
The outer layer sheet 6 is a substantially rectangular laminated sheet formed by laminating and bonding two sheets. The outer layer sheet 6 is longer in the longitudinal direction than the sheet-like member 3 and has concave leg edges 6a on both left and right edges. , 6a are formed.
[0008]
Thus, the sheet-like member 3 has a flap portion 31 that extends outward along the side edge portion 23 a of the absorbent body 23 in the absorbent main body 2. In FIG. 3, the pair of left and right flap portions 31, 31 are illustrated by imaginary lines in a state where they are opened left and right without being folded back.
Each flap portion 31 is provided with an elastic member 7 over the longitudinal direction, and a part of the elastic member 7 is located on the back surface side of the absorbent body 23 in the central portion in the longitudinal direction of the absorbent main body 2. positioned. Moreover, the elastic member 7 is distribute | arranged so that the circumference | surroundings of a wearer's leg root may be followed at the time of wear. Here, the central portion in the longitudinal direction of the absorbent main body 2 is a portion existing between the leg edge portions 6a, 6a disposed around the legs, preferably between the crotch of the wearer and the vicinity thereof. Say.
[0009]
More specifically, each of the plurality of elastic members 71 and 72 has intermediate portions 71b and 72b in the longitudinal direction located on the back side of the absorber 23, and front portions 71a and 72a and rear portions 71c and 72c thereof. These are arranged so as to be located in the flap portions 31 respectively.
The front part and the rear part of each elastic member 71, 72 in the present embodiment are arranged on the flap parts 31, 31 on the left and right sides, and the front part and the rear part are the front and rear of the diaper. Are arranged on different sides.
[0010]
The elastic members 71 and 72 are sandwiched and fixed between the sheet-like member 3 and the leak-proof sheet 22 at the intermediate portions 71b and 72b, and at the front portions 71a and 72a and the rear portions 71c and 72c. The front end portion of the flap portion 31 is clamped and fixed to adhesive portions 33 and 33 formed by folding back and bonding so that a free end edge 32 is formed at the front end.
The pair of elastic members 71 and 72 are arranged across the disposable diaper 1 in the width direction on the back surface side of the absorber 23 so as to cross in an X shape on the back surface side of the absorber 23. The pair of elastic members 71 and 72 intersect each other at the center in the width direction and in the length direction of the diaper, and the front portion 71a of the one elastic member 71 is located at the one flap portion 31 and the rear. The portion 71 c is located on the other flap portion 31, the front portion 72 a of the other elastic member 72 is located on the other flap portion 31, and the rear portion 72 c is located on the one flap portion 31. .
[0011]
Looking at one of the flap portions (the left-side flap portion in FIG. 2), in the flap portion 31, the elastic member 72 and the elastic member 71 that are different between the portion near the ventral side A and the portion near the back side B. However, the elastic member 72 and the elastic member 71 are substantially continuous in the longitudinal direction of both flap portions and function in the same manner as a physically continuous elastic member. Similarly, the other flap portion is configured such that the elastic member 72 and the elastic member 71 are substantially continuous and function in the same manner as the physically continuous elastic member. In the present specification, “the elastic member is arranged along the longitudinal direction” means that a plurality of elastic members are arranged along the longitudinal direction of the flap portion 31 so as to be substantially continuous. including.
[0012]
In addition, each elastic member 71,72 in this embodiment is each a thin strip shape, and each elastic member 71,72 is each arranged in multiple numbers (two) so that it may mutually adjoin and parallel.
Further, the auxiliary elastic member 8 is disposed along the free end edge 32 at the free end edge 32 at the front end in the extending direction of each flap portion 31. Each auxiliary elastic member 8 is in the form of a narrow band, and is clamped and fixed to the adhesive portions 33 and 33 in the flap portion.
[0013]
As shown in FIGS. 2 and 4, both end portions 31 a and 31 a in the longitudinal direction of the flap portion 31 are folded back to the surface side of the absorbent main body 2, and the folded portions 34 and 34 together with the elastic member 7 It is fixed to the surface side of the absorbent main body 2.
More specifically, the flap portion 31 is folded in two with the central portion along the longitudinal direction being a folding base portion, and folded portions 34 and 34 in which the sheet-like members 3 are double-layered are formed by the folding. Has been.
The folded portions 34, 34 are sandwiched and fixed between the both ends 6 b of the outer layer sheet 6 folded from the back surface side to the front surface side of the absorbent main body 2 and the absorbent main body 2.
[0014]
Explaining the forming material of each member constituting the disposable diaper 1 of the present embodiment, as the forming material of the topsheet 21, the leakproof sheet 22, the absorber 23, the outer layer sheet 6, the elastic member 7, and the auxiliary elastic member 8 In general, those used for disposable diapers can be used without particular limitation. The sheet-like member 3 may be a commercially available woven fabric, knitted fabric, non-woven fabric, film or the like, and is preferably a non-woven fabric from the viewpoints of cost, touch and water resistance. Combinations are preferred.
[0015]
The disposable diaper of this embodiment can be used similarly to a normal unfolded disposable diaper.
And in the disposable diaper 1 of this embodiment, the elastic member 7 is distribute | arranged as mentioned above to the flap part 31 extended on either side of the sheet-like member 3 distribute | arranged to the back surface side of the absorptive main body, Since both end portions in the longitudinal direction of the flap portion 31 are folded back to the surface side of the absorbent main body, and the folded portion is fixed together with the elastic member 7, the flap is positioned at the wearer's crotch portion when the diaper is worn. A portion existing between both end portions 31 a and 31 a of the portion 31 stands up, and the raised portion functions as a three-dimensional guard G. Therefore, it is possible to effectively prevent the excrement from leaking without separately providing a sheet material for forming the three-dimensional guard.
[0016]
Moreover, in the disposable diaper 1 of this embodiment, the solid guard G is formed by the flap part 31 as mentioned above, and the sheet | seat material which forms a solid guard is not being fixed to the surface side of the absorptive main body 2. FIG. Therefore, as shown in FIG. 3, excrement holding spaces H and H are formed as large spaces in the outer portions of the left and right side edges of the absorber 23.
Further, as described above, the three-dimensional guard G is formed by the flap portion 31, and the sheet material forming the three-dimensional guard is not fixed on the absorbent main body 2. The width W increases. Therefore, it is possible to ensure that the absorbent surface is aligned with the urination part of the wearer, and the excrement can be absorbed immediately and the excrement can be prevented from flowing in the disposable diaper. For this reason, it is excellent in leakage prevention property.
[0017]
Further, since the auxiliary elastic member 8 is provided as described above, the intermediate portion of the flap portion 3 can be raised more effectively, and therefore, the leakage preventing property is more excellent.
[0018]
Furthermore, in the disposable diaper according to the present embodiment, since the elastic member 7 is located on the back side of the absorbent body 23 in the central portion in the longitudinal direction of the absorbent main body 2 as described above, a part of the diaper is The diaper is lifted gently toward the wearer's skin, and the diaper has a form with excellent fit as shown in FIG. In other words, the elastic member 7 has two functions: a function of raising the flap portion 31 to form the three-dimensional guard G, and a function of maintaining the shape of the diaper with a shape having excellent fit. Moreover, in this embodiment, since the elastic member 7 is distribute | arranged along the circumference | surroundings of a wearer's leg at the time of wear, it is what was further excellent in fit property and leak-proof property.
[0019]
Next, an example of the manufacturing method of the disposable diaper 1 of this embodiment is demonstrated.
First, the sheet-like member 3 is laminated on the outer layer sheet 6, and the elastic member 7 and the auxiliary elastic member 8 are disposed at a predetermined position of the sheet-like member 3. And the absorptive main body 2 obtained according to the conventional method is mounted on the sheet-like member 3 in which the elastic member 7 and the auxiliary elastic member 8 are disposed. And the part extended to the outer side of the absorber 23 is made into the flap part 31, and both ends 31a and 31a of the longitudinal direction of this flap part 31 are made into the surface side of the mounted absorbent main body 2, and the elastic member 7 It folds in the position inside the position near the outer edge where both ends are located. Then, both end portions 31 a and 31 a of the flap portion 31 that is folded back into two layers are fixed to the surface side of the absorbent main body 2 together with the elastic members 7 and 8. And the both-sides edge part A1, B1, and A2, B2 of each of the abdominal part A located in a wearer's ventral side and the back | dorsal part B located in the back | dorsal side at the time of wear are joined, and the disposable diaper 1 is obtained. .
[0020]
Thus, the disposable diaper of this embodiment does not need to manufacture and arrange | position the member for solid guard formation separately in the case of the manufacture. Further, the elastic member 7 and the auxiliary elastic member 8 can be fixed in the same process. Therefore, the number of parts is reduced, and the manufacturing process can be simplified and simplified.
[0021]
The principal part of other embodiment of the disposable diaper of this invention was shown in FIG. Each diaper shown in FIG. 5 is the same as that in the above-described embodiment shown in FIGS. 1 to 4 except that the arrangement of elastic members is different. is there. Therefore, differences from the above-described embodiment will be particularly described below, and description of similar configurations will be omitted. In addition, the description regarding said embodiment is applied suitably about the point which is not demonstrated especially.
[0022]
In the diaper shown in FIG. 5 (b), the elastic members 71 and 72 are close to each other at the intermediate portions 71b and 72b located on the back side of the absorber 23, but are not crossed. Further, the front portions 71a and 72a and the rear portions 71c and 72c are located on the flap portion 31 on the same side. 5A is a diagram illustrating a state before the flap portion 31 is folded back, and P in FIG.
[0023]
Further, in the diaper shown in FIG. 5 (c) or (d), the front part 71a and the rear part 71c of one elastic member 71 of both elastic members 71 and 72 are both positioned in front of the diaper, and the other elastic member. The front part 72a and the rear part 72c of 72 are both located in the rear part of the diaper.
Effects similar to those of the above-described embodiment can also be obtained by the diapers shown in FIGS. 5 (b) to 5 (d). The auxiliary elastic member 8 is preferably disposed.
[0024]
【The invention's effect】
The disposable diaper of the present invention is excellent in leakage prevention and fitting properties, and can be manufactured at a low cost by suppressing the number of parts necessary for manufacturing.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a disposable diaper according to the present invention.
FIG. 2 is a plan view showing a surface sheet side in a state where the disposable diaper shown in FIG.
FIG. 3 is a schematic cross-sectional view taken along line XX of FIG.
4 is a schematic cross-sectional view taken along the line YY of FIG. 2. FIG.
FIG. 5 is a schematic view of the essential part showing another embodiment of the disposable diaper of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Absorbent main body 21 Top sheet 22 Leak-proof sheet 23 Absorber 3 Sheet-like member 31 for fixing an elastic member Flap part 31a Longitudinal end 32 Free edge 34 Folded part 6 Outer sheet 7 Elastic member 8 Auxiliary Elastic member G Solid guard H Excrement holding space A Ventral side B Back side

Claims (2)

A substantially vertically long absorbent main body having a liquid-permeable surface sheet, a liquid-impermeable leak-proof sheet, and a liquid-retaining absorbent, and a sheet-like member disposed on the back side of the absorbent main body In a pants-type disposable diaper in which a waist opening and a pair of leg openings are formed,
The sheet-like member has a flap portion extending outward along a side edge portion of the absorber, and an elastic member is disposed on the flap portion along the longitudinal direction thereof, and the elastic member A part of the member is located on the back side of the absorbent body in the longitudinal center part of the absorbent main body, and the flap part has both longitudinal ends on the front side of the absorbent main body. A disposable diaper which is folded back and the folded portion is fixed together with the elastic member. The disposable diaper of Claim 1 with which the auxiliary | assistant elastic member is distribute | arranged to the free end edge of the extension direction front-end | tip in the said flap part along this free end edge.

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