JP3429323B2 - Paper diapers - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper having a mountain-shaped barrier cuff which is inclined in cross section in use. 2. Description of the Related Art There has been a remarkable improvement in disposable diapers in recent years, and a typical example of such improvement is to form barrier cuffs on both sides of the disposable diaper, thereby preventing lateral leakage of loose stools in particular. . [0003] For example, Japanese Patent Application Laid-Open No. 62-250201 discloses a structure in which one barrier sheet is fixed to a flap portion to be a proximal end, and an elastic extensible member is provided at a free distal end, and its deformation. As an example, the top sheet is extended, folded in the middle of the flap portion and raised to form a barrier cuff, and the side edge of the folded portion is a distal end,
It also discloses a structure in which the erect portion is a proximal end. Although there are many other proposals, there are many variations based on the above publication technology. [0004] However, in the disposable diaper described in the above-mentioned publication, the barrier cuff that rises inwardly when in use is likely to fall down during use, so that the leg cuff and the barrier cuff are not squeezed. The free side edge is often spaced apart, resulting in loose stool or urine passing over the spaced apart portion, causing lateral leakage. Further, the publication discloses that forming a pocket space or channel between the proximal end of the barrier cuff and the side edge portion of the absorber is effective in preventing loose stool. However, according to the findings of the present inventors,
Its effectiveness could not be confirmed. Accordingly, an object of the present invention is to prevent the barrier cuff from falling down as much as possible. The object of the present invention is to provide a liquid-permeable sheet on the use side, a liquid-impermeable sheet on the back side, an absorber therebetween, and both sides projecting toward the use side. In a disposable diaper having a barrier cuff, the barrier cuff is substantially composed of a liquid-impervious or water-repellent barrier sheet continuous in a width direction and an elastic elastic member; Having two proximal ends and one free distal end, wherein the elastic member is disposed at the distal end, one proximal end being on a flap free of the absorber, and the other proximal end The end is located inside the side edge of the absorber and is fixed to the liquid-permeable sheet, and the side edge of the liquid-permeable sheet extends outward from the other proximal end, while The proximal end has not been reached and the barrier cuff is In a deployed state of use, the barrier cuff is substantially folded inward, and only the front and rear ends of the barrier cuff are fixed to the main body of the disposable diaper in a state in which the elastic elastic member is located at the folded side edge portion, and the middle portion is free. In a trapezoidal triangle that is configured to be erected by the contraction force of an elastic elastic member and that connects the two proximal ends and the distal end in the erected state, the distal end is located closer to the center of the two proximal ends. It can be solved by being located inside. The barrier cuff according to the present invention is composed of a liquid-impermeable or water-repellent barrier sheet that is substantially continuous in the width direction and an elastic expansion / contraction member. A proximal end and a free one distal end, wherein the elastic member is disposed at the distal end, one proximal end is on a flap free of an absorber, and the other proximal end is Positioned inside the side edge of the absorbent body and fixed to the liquid-permeable sheet, the barrier cuff is substantially inwardly folded in an unused unfolded state of the disposable diaper, and the elastic side extension is provided at the folded side edge portion. In the state where the member is located, only the front and rear ends of the barrier cuff are fixed to the main body of the paper diaper, and the middle portion is freely raised by the contraction force of the elastic elastic member. And the distal end In a scalene triangle, the distal end is a barrier cuff located inward of the center of the two proximal ends.
With this shape, when worn, there is no warping outward, and the barrier properties are good. Moreover, inward fall is basically prevented. The side edge of the liquid-permeable sheet extends outward from the other proximal end but does not reach the one proximal end, so that side leakage from the side edge of the product is prevented. Can be prevented. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; 1 and 2 show a first embodiment. In the disposable diaper according to the present invention, between the liquid-impermeable sheet 1 made of polyethylene or the like and the liquid-permeable sheet 2 made of nonwoven fabric or the like, made of cotton-like pulp or the like, for example, rectangular or, preferably, as shown Is interposed. The absorber 3 can be wrapped with absorbent paper (not shown) to maintain its shape. The liquid impermeable sheet 1 extends outward from the periphery of the absorber 3 and has an hourglass shape. The side extending portion of the liquid-impermeable sheet 1 is connected to a flap F together with a barrier sheet 4 described later.
Is composed. The lateral shape of the liquid-permeable sheet 2 is substantially the absorber 3
And extends slightly outward from the side edge of the absorber 3, and is fixed to the liquid-impermeable sheet 1 with a hot melt adhesive or the like. The longitudinal end coincides with the disposable diaper. On both sides of the disposable diaper, barrier cuffs B, B projecting toward the side of use are formed. The barrier cuffs B are connected to a barrier sheet 4 substantially continuous in the width direction, as shown in FIG. It is composed of a plurality of elastic elastic members 5,5. Furthermore, barrier cuffs B
Formed by folding the barrier sheet 4;
It has two proximal ends 51, 52 constrained to the disposable diaper body and one free distal end 60, on which elastic resilient members 5, 5 are arranged, one proximal end 52 Is at the flap F and the other proximal end 51 is located inside the side edge of the absorber 3. More specifically, the barrier sheet 4
The outer part of the elastic elastic member 7 for gasket cuffs,
The liquid-permeable sheet 2 is fixed to the liquid-permeable sheet 1 with a hot-melt adhesive or the like, with the inside portion substantially coincident with the side edge portion of the absorber 3 with a hot-melt adhesive or the like. It is fixed, and the middle between these two fixed parts is a free part. In the folding free portion, the disposable diaper is substantially folded inward in an unused deployed state (indicated by the phantom line in FIG. 2), and the elastic elastic members 5, 5 are included in the folded side edges. To the barrier sheet 4. On the other hand, barrier sheet 4
In the front and rear ends of the free portion, the inner surface of the fold is fixed to the upper surface of the liquid-permeable sheet 2 by a hot-melt adhesive or the like at the portion indicated by hatching in FIG. I have. Therefore, the middle portion in the longitudinal direction of the barrier sheet 4 excluding the restrained portion is free, and when the boat is formed into a boat shape in the front-rear direction when worn, the contraction force of the elastic elastic members 5, 5 causes the solid line in FIG. As shown by, it stands. By this standing, the barrier cuff B is generated. 6 is a fastening tape. The barrier cuffs B, B abut around the leg of the wearer, and the barrier cuffs B, B and the liquid-permeable sheet 2 form a trapezoidal confined space that is open upward. When urine is discharged into this space, the urine is absorbed into the absorber 3 through the liquid-permeable sheet 2, and the barrier cuffs B, B serve as barriers for loose stool solids, and are prevented from getting over. You. In the unlikely event that the urine leaks sideways over the upright side edges of the barrier cuffs B, B, the gasket cuffs by the elastic elastic members 7 prevent lateral leakage. On the other hand, the barrier cuff B according to the present invention comprises:
As shown in FIG. 2, in the upright state, the vertices of the scalene triangle connecting the two proximal ends 51 and 52 and the distal end 60 are located inside the center. With this shape, when worn, there is no warping outward, and the barrier properties are good. Moreover, falling down inward,
Basically prevented. The reason why this inward fall is prevented is as follows. That is, the elastic elastic members 5, 5
Acts to maintain a straight line due to the contraction force. At this time, at the time of wearing, when the front and rear of the disposable diaper has a boat shape, a force acts against the linearization of the elastic elastic members 5,5. Therefore, as shown in FIG. 2, the free portion of the barrier cuff B except for the front and rear ends can be drawn from the distal end 60 toward the proximal end 52, so that it rises up and is close to the distal end 60. Length with distal end 52, distal end 6
The barrier cuff B retains its shape at a position where the length of 0 and the proximal end 51, as well as the diaper hull shape, are balanced. Conversely, from this balanced state,
Even if the side edge of the barrier cuff B moves outward or inward, since the lengths are regulated, outward curling and inward falling are prevented. Further, the proximal end 51 is located inside the side edge of the absorber 3. Therefore, the portion has a certain degree of rigidity, is stable in shape, and follows the shape of the boat well, so that the above-mentioned effects become more apparent. The present invention includes other modifications. The second embodiment is an example in which a flap is formed only by the barrier sheet 4 as shown in FIG. In the third embodiment, as shown in FIG. 4, a liquid-permeable or liquid-impermeable sub-band 9 is adhered to the back surface of the outer portion of the barrier sheet 4. In the fourth embodiment, as shown in FIG. 5, the straddling band 8 is fixed to the inside of the barrier cuff B so as to straddle the inner surface of the inner rising surface and the inner surface of the outer rising surface of the barrier sheet 4. It is. In the fifth embodiment, as shown in FIG. 6, the side edge portions of the barrier sheet 4 are fixed to each other with an adhesive or the like. In the fourth and fifth embodiments, the elastic elastic member 5
It is not necessary to adhere to the barrier sheet 4 at the intermediate portion in the front-rear direction. Preferably, the barrier sheet 4 is basically liquid-impermeable or water-repellent (by silicon or the like). As described above, according to the present invention, it is possible to prevent the barrier cuffs from curling outward and falling inward, and to sufficiently exhibit the effect of preventing loose stools.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially broken plan view of a disposable diaper according to the present invention in an unfolded state. FIG. 2 is a perspective view of a main part thereof. FIG. 3 is a schematic sectional view of a main part of a second example. FIG. 4 is a schematic sectional view of a main part of a third example. FIG. 5 is a schematic sectional view of a main part of a fourth example. FIG. 6 is a schematic sectional view of a main part of a fifth example. [Description of Signs] 1 Liquid-impermeable sheet 2 Liquid-permeable sheet 3 Absorber 4 Barrier sheet 5 Elastic expansion members 51, 52 Proximal end 60 Distal end B Barrier cuff F Flap member

   ────────────────────────────────────────────────── ─── Continuation of front page       (56) References JP-A-2-274250 (JP, A)                 JP-A-2-156946 (JP, A)                 JP-A-1-213402 (JP, A)                 Hikaru Hei 2-86519 (JP, U)                 1-173106 (JP, U)

Claims (1)

(57) [Claims 1] A liquid-permeable sheet on the use side, a liquid-impermeable sheet on the back side, an absorber therebetween, and barrier cuffs projecting to the use side on both sides. In the disposable diaper, the barrier cuff is constituted by a liquid-permeable or water-repellent barrier sheet which is substantially continuous in a width direction and an elastic elastic member; A proximal end and a free one distal end, wherein the resilient telescoping member is disposed at the distal end, one proximal end is on a flap free of an absorber, and the other proximal end is The side edge of the liquid-permeable sheet is located inside the side edge of the absorber and is fixed to the liquid-permeable sheet. The edge has not been reached, and the barrier cuff is in an unused unfolded state In a state in which the elastic elastic member is positioned qualitatively inward and the elastic elastic member is located at the folded side edge portion, only the front and rear ends of the barrier cuff are fixed to the main body of the disposable diaper, and the intermediate portion is freely contracted by the elastic elastic member. In a trapezoidal triangle configured to stand up by force and connecting the two proximal ends and the distal end in the upright state, the distal end is located inside the center of the two proximal ends. A disposable diaper characterized by the following.