JP2007075277A - Disposable diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable diaper which hardly forms gaps around the legs and fits even to a wearing person whose thighs become thin by solving the problem that a bed-ridden wearing person in particular has his/her muscles and thighs thinned, so that the leg-around opening parts of the disposable diaper become difficult to be along the leg-around parts of the wearing person. <P>SOLUTION: The developing-type disposable diaper 10 has an outer shape where a front abdominal part, a crotch part and a rear back part are connected and the leg-around parts (leg-around edges 11) are recessed. A plurality of elastic members 16a, 16b, 16c and 16d for the leg-around parts are provided stretched through the whole area of the leg-around parts. The elastic members arranged on sides close to the edges 11 (such as the elastic members 16c and 16d) are constituted to have higher contraction force than that of the elastic members arranged on sides far from the edges 11 (such as the elastic members 16a and 16b). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an unfoldable disposable diaper that is used by binding the waistline during use.

  Disposable diapers are broadly divided into flat diaper developed bodies, unfolded diapers that are worn by binding the left and right wings of the back side to the abdominal side during use, and pants-type diapers shaped like pants. Pants-type diapers are used exclusively for infants who have a certain amount of exercise. On the other hand, unfolded diapers can be easily removed by removing the left and right wings even when the wearer is sleeping. Since it can be exchanged, it is preferably used by infants and wearers who rarely move when bedridden.

The disposable diaper has an elastic member attached to the waist in a stretched state in order to make the waist part fit well. The elastic member is attached in an extended state. As the elastic member for the leg roll, the formed leg roll gather has a fine and soft feeling when a plurality of thin thread-like bodies are attached in parallel rather than a single thick string-like body. Therefore, a type in which a plurality of lines are attached is common (for example, see Patent Document 1).
JP-A-8-280740 (for example, FIGS. 4 and 5) Japanese Patent Laying-Open No. 2005-27838 (for example, FIG. 1, paragraphs [0021] to [0024])

  By the way, for bedridden wearers and babies, unfolded disposable diapers are exclusively used as described above, and by adjusting the detachment position of the detachable member at the waist position, a gap is not created. For the wearer, the muscles are thin and the thighs are thin since they do not move almost everyday, so it is difficult for the wearer's legs to follow the leg opening of the disposable diaper, forming a gap and leaking. There is a concern to cause.

  Therefore, the present invention has been made paying attention to the circumstances as described above, and its purpose is to provide a disposable diaper that fits easily even in a wearer whose thigh is thin, so that it is difficult to form a gap in the leg rack. It is to provide.

  A disposable diaper according to the present invention is an unfolded disposable diaper having an outer shape in which a front abdomen, a crotch part, and a back part are continuous and a leg part is depressed, and a plurality of legs are spread over the whole leg part. The elastic member for feeding is attached in an extended state, and the elastic member for leg feeding arranged on the side near the edge of the leg feeding among the plurality of elastic members for leg feeding is arranged on the far side. It is configured such that the contraction force is higher than that of the leg elastic member. The above-mentioned “whole leg portion entire area” means the whole of the leg revolving direction, and does not mean the entire width direction (the whole area in the arrangement area of the leg revolving elastic members). However, as for the place where the leg retraction elastic member is attached, in addition to the case where it is attached near the leg revolving end edge in the whole area of the leg revolving direction, the leg revolving end edge at some places in the leg revolving direction. In some cases, it is attached a little away from the station. In addition, the above-mentioned “configuration is such that the leg elastic member arranged on the side close to the edge of the leg holder has higher contraction force than the leg elastic member arranged on the far side” When the elastic member gradually increases in contraction force toward the leg retraction edge, or when a plurality of elastic members for leg retraction are divided into 2 groups (or more than 3 groups), the group closer to the leg retraction edge This includes the case where the contraction force is higher than that on the far side.

  Since this invention is comprised in this way, it can shrink | contract firmly so that it goes to the edge of a leg opening, and even if it is a wearer whose thigh became thin, it becomes easy to follow the leg periphery. As a result, the possibility that urine or the like leaks from the gap of the leg opening is reduced.

  By the way, if the contraction force is increased for all of the plurality of leg retraction elastic members, the leg periphery can be tightly squeezed, but if the plurality of elastic members are all of a high contraction force, the leg periphery is reduced. There is a concern that it will hurt because it will tighten tightly over a wide range. On the other hand, in the present invention, the elastic member on the side (distant side) away from the end edge does not have a very high contraction force, and therefore does not tighten strongly as a whole. And since the side close to the leg retraction edge has a high contraction force, the leg retraction can be tightly closed and it is difficult to leak.

  Incidentally, the above-mentioned Patent Document 2 proposes a disposable pants-type diaper in which a plurality of front leg elastic members at the front edge of the leg opening are gradually contracted toward the leg edge. Has been. The thing of this patent document 2 is the same as this invention in the point that the elastic member located in an edge is attached so that contraction force may become high, but the structure differs as described below. Therefore, its action and effect are different.

  That is, in Patent Document 2, the contraction force differs with respect to a plurality of elastic members provided along the straight lower end edge (front edge portion of the leg rack) of the rectangular front abdomen. The distances are the same as the sheet where the members are arranged ((c) in FIG. 5: schematic explanatory diagram showing the attached state of the elastic members 46a, 46b, 46c in Patent Document 2) (elastic member) 46a = 46b = 46c) as the sheet length at the arrangement location. For this reason, when the elastic member contracts, a force that squeezes equally on the inside and outside is applied, and the lower end edge of the front abdomen (the front edge of the leg rack) is caused by a slight resistance due to the presence of the body on the inside. Instead of going inward, it can bend outward (FIG. 5 (d): schematic explanatory diagram showing the state of the sheet in Patent Document 2). And since it is such a structure, it becomes suitable for the wearer with high activity.

  On the other hand, in the present invention, an elastic member is provided over the entire leg-feeding portion formed in a concave shape, that is, a plurality of elastic members are attached side by side to the arc-like leg-feeding portion. For this reason, the distance of the sheet at the location where each elastic member is disposed is different. Specifically, the distance between the sheets at the location where the elastic member is located toward the edge of the leg-feeding edge, which is the arcuate inner side (see FIG. 5 (a): Schematic diagram showing the attached state of the elastic members 26a, 26b, 26c in the present invention) (26a> 26b> 26c as the sheet length of the elastic member disposition portion). Therefore, in the present invention, it does not squeeze outward, but contracts so as to close the legs firmly toward the inside (the inside of the arc) ((b) in FIG. 5: sheet in the present invention) Schematic explanatory diagram showing the state of). Therefore, it fits suitably also for the wearer whose thigh etc. became thin by bedridden.

  In the present invention, as described above, the leg elastic member disposed on the side closer to the edge of the leg holder among the plurality of leg elastic members is more contractive than the leg elastic member arranged on the far side. As an aspect to increase the height of the leg advancement, the leg advancement elastic member arranged on the side closer to the edge of the leg advancement is attached in a higher extension state than the leg advancement elastic member arranged on the far side. It is mentioned that.

  In this case, even if there is only one kind of leg-feeding elastic member that can be prepared, it is possible to increase the contraction force on the side close to the leg-feeding edge by changing the extension state as described above. is there.

  As another aspect, the leg elastic member disposed on the side close to the edge of the leg holder has a higher elastic modulus than the leg elastic member arranged on the far side. Can be mentioned.

  In this way, by using materials having different elastic modulus as the material for the leg retraction elastic member, a method of extending and attaching the plurality of leg retraction elastic members at the same expansion ratio in the manufacturing process was adopted. Even in this case, the contraction force on the side close to the edge can be increased. And, in the case of the method of attaching by extending at the same extension magnification in this way, setting of the attaching device for the elastic member becomes simple.

  As yet another aspect, the plurality of leg elastic members are made of the same elastic modulus, and the leg elastic members arranged on the side closer to the edge of the leg holder are the distant members. It is mentioned that the fineness is higher than that of the elastic member for leg feeding arranged on the side.

  Even if it is the same material, as the thickness is thicker (the fineness is higher), the contraction force becomes higher. Therefore, in this case as well, it is possible to increase the contraction force on the side close to the edge while adopting a method in which a plurality of elastic members for leg feeding are attached at the same expansion ratio in the manufacturing process. Setting of the apparatus becomes simple.

  Moreover, as another aspect, it is mentioned to arrange | position a space | interval narrower than the leg elastic member arranged on the side far from the leg elastic member arranged on the side close to the edge of the leg holder. .

  The narrower the gap, the higher the contraction force appears as the leg retraction part. Therefore, in this case, there is only one kind of leg-feeding elastic member that can be prepared, and even if the elastic member is stretched at the same expansion ratio and attached, the contraction force on the side near the leg-feeding edge is increased. Is possible.

  In addition, you may carry out combining each said aspect suitably.

  According to the disposable diaper according to the present invention, even if the wearer has a thin thigh, the leg rack can be fitted well, and there is little concern about leakage of urine or the like.

<Embodiment 1>
FIG. 1 is a plan view of a developed body showing a disposable diaper 10 according to Embodiment 1 of the present invention, with the skin side surface (the surface in contact with the skin) of the diaper facing forward. 2 is a cross-sectional view taken along line XX shown in FIG. FIG. 3 is a perspective view showing a form in which the disposable diaper 10 is worn.

  The outer shape of the disposable diaper 10 is an hourglass shape in which the center of the long side of the rectangle is recessed, and this recessed portion becomes a crotch portion 54, and one side that is widened continuously to the crotch portion 54 is the back side portion 55. The other side is the ventral portion 56. A fastening tape 63 having a hook-shaped engagement member 62 is attached to the tip portion of both wing pieces 55a on the back side portion 55 of the disposable diaper 10, while the anti-skin side surface (outside surface) of the ventral side portion 56 is attached. 3 is provided with a loop type engaging member 64. By engaging the hook type engaging member 62 with the loop type engaging member 64, the loop type engaging member 64 can be worn as shown in FIG.

  The disposable diaper 10 has a structure in which a liquid-impermeable (or liquid-impermeable, moisture-permeable) back sheet 52 and a liquid-permeable top sheet 53 are laminated with an absorbent body 51 interposed therebetween. The absorbent body 51 extending from the crotch to the abdomen and the back is sandwiched between a top sheet 53 (skin surface side) and a back sheet 52 (anti-skin surface side) larger in size. By this laminated structure, excrement such as urine is prevented from permeating through the top sheet 53 and being accommodated in the absorber 51 and oozing out by the back sheet 52. Examples of the material for the top sheet 53 include liquid-permeable nonwoven fabrics, and examples of the material for the back sheet 52 include liquid-impermeable plastic films and water-repellent nonwoven fabrics. As the absorbent body 51, an absorbent core obtained by mixing a granular polymer water absorbent in a hydrophilic fiber aggregate layer such as pulverized pulp fiber or cellulose fiber, and a coated sheet such as a paper sheet such as tissue paper or a liquid-permeable nonwoven sheet. And molded into a predetermined shape (rectangular, hourglass, gourd, etc.).

  Further, in the longitudinal direction of both side edges of the disposable diaper 10, a side sheet 57 is provided so as to overlap the top sheet 53, and a three-dimensional elastic yarn 58 is disposed at the center side end of the side sheet 57, and the side sheet 57 57 stands up toward the skin side. The side sheet 57 that has risen prevents lateral leakage of excrement such as urine. Examples of the material for the side sheet 57 include a liquid-impermeable plastic film and a water-repellent nonwoven fabric.

  Further, an elastic yarn 61 for waist is attached in the stretched state in the waist direction of the diaper 10, thereby improving the fit of the waist part and preventing back leakage and abdominal leakage of excrement. .

In the disposable diaper 10, a plurality of (four in the illustrated example) leg-feeding elastic yarns 16 (16 a) are provided so as to be substantially along the edge 11 of the leg-feeding portion in the entire region of the leg-feeding portion that is recessed in the arc shape on both side edges. 16b, 16c, 16d) are attached in an expanded state. Further, these leg elastic yarns 16 are located closer to the edge 11 of the leg holder at the outer side (left / right outer side) of the absorbent body 51 (left and right outer side) (only the seats 52, 53, 57). It arrange | positions so that a space | interval may become narrow. That most absorber 51 near the leg repeated elastic yarn 16a and the width W ₁ of the leg repeated elastic yarns 16b of the _next, the width W ₂ of the leg repeated elastic yarn 16c further adjacent this foot counterbore elastic yarn 16b, extent that the width W ₃ of the most leg counterbore edge 11 and elastic yarns 16c for repeatedly legs are arranged so narrowed. Therefore, the progressive contraction force becomes higher toward the edge 11. In addition, as the elastic yarns 16a, 16b, 16c, and 16d for leg feeding, elastic yarns of the same material and the same thickness are used, and all are attached in the same stretched state.

  As the elastic yarn 16 for leg feeding, an elastic elastic material generally used for disposable diapers such as polyurethane yarn, polyurethane film, natural rubber, etc. can be used, and any one of the sheets 52, 53, 57 can be used. In addition, it is preferable to attach by a suitable bonding means such as hot melt adhesive, thermal bonding, ultrasonic bonding or the like while it is in an extended state (more preferably, a rubber-based hot melt adhesive is used as the mounting means). In particular, it is preferable that a polyurethane yarn having a fineness of 300 to 2000 dtex is stretched to a magnification of 1.1 to 5.0 times and attached using a rubber-based hot melt adhesive.

  The elastic elastic material 61 (polyurethane yarn, polyurethane film, natural rubber, etc.) generally used for disposable diapers can also be used as the material for the elastic yarn 61 for waist and the elastic yarn 58 for three-dimensional. Similarly, the elastic yarns 61 and 58 may be attached by a suitable bonding means such as hot melt adhesive, thermal bonding, ultrasonic bonding or the like while the elastic yarns 61 and 58 are in an extended state. In the case of the elastic yarn 61 for the waist, the polyurethane yarn having a fineness of 700 to 2000 dtex is stretched to a magnification of 2.0 to 5.0 times. In the case of the elastic yarn 58 for the three-dimensional, the polyurethane yarn having a fineness of 300 to 1850 dtex It is more preferable to stretch the film at a magnification of 1.1 to 4.0 times and attach it using a rubber-based hot melt adhesive.

  The disposable diaper 10 according to Embodiment 1 has a leg retracting portion that has a higher contraction force toward the edge 11, so even if the wearer has a thin thigh, the diaper 10 around the leg. It is easy to follow the leg and the leakage of urine etc. is well prevented.

<Embodiment 2>
FIG. 4 is a cross-sectional view of a leg portion in a disposable diaper according to Embodiment 2 of the present invention, and is a diagram corresponding to a cross section taken along line XX of FIG. The same components as those in FIGS. 1 and 2 are denoted by the same reference numerals to avoid redundant description.

In the first embodiment, the leg-feeding elastic yarns 16a, 16b, 16c, and 16d are arranged such that the closer to the edge 11 of the leg-feeding, the narrower the interval, but in the second embodiment, FIG. As shown in FIG. 3, the three leg-feeding elastic yarns 16b, 16c, 16d on the leg-feeding end edge 11 side are narrowly arranged at equal intervals, and the leg-feeding elastic yarn 16a closest to the absorber 51 is positioned slightly apart. (Positioning relationship of elastic yarn for leg retraction: W ₁ > W ₂ = W ₃ ).

  The leg-feeding elastic yarns 16a, 16b, 16c, and 16d of the second embodiment are elastic yarns of the same material and the same thickness, but the leg-feeding elastic yarns located on the side of the leg-feeding end edge 11 have higher elongation. In other words, the extension magnification at the time of attachment is elastic yarn 16a <elastic yarn 16b <elastic yarn 16c <elastic yarn 16d.

  In the second embodiment, as described above, the leg spacing elastic yarns 16 are arranged at different intervals, and each leg feeding elastic yarn 16 is attached in a different stretched state. Appears with gradually increasing contraction force toward the edge 11. Therefore, even in the second embodiment, even if the wearer has a thin thigh, it is easy to follow the leg portion of the diaper 10 around the leg, and leakage of urine and the like is prevented well.

  As described above, the disposable diaper according to the present invention has been specifically described with reference to the drawings showing examples. However, the present invention is not limited to the illustrated examples, and can be adapted to the above-described purpose. The present invention can be carried out with appropriate modifications, and all of them are included in the technical scope of the present invention.

  For example, by making the arrangement of a plurality of leg-feeding elastic yarns equal in width and changing the material and thickness of each leg-feeding elastic yarn, or the expansion ratio at the time of attachment, the contraction force toward the leg-feeding edge 11 It is good also as a structure which becomes high.

In addition, the configuration is not limited to the configuration in which the contraction force gradually increases over the entire leg elastic yarns. For example, as shown in FIG. 4, an arrangement relationship of W ₁ > W ₂ = W ₃ is established, and the leg elastic yarns 16 a and 16 b are arranged. , 16c, and 16d, elastic yarns having the same thickness and the same material may be used, and both may be attached in the same stretched state.

  Further, in the above embodiment, the four leg elastic yarns are shown, but the present invention is not limited to this, and may be three, five, six or more, for example.

  Further, in the above-described embodiment, the elastic yarn 16 for leg feeding is arranged in an arc shape along the leg feeding edge 11, but not limited thereto, the elastic yarn for leg feeding is arranged in a straight line. (For example, in FIG. 1, the leg-feeding elastic yarns 16 a, 16 b, 16 c, and 16 d are arranged vertically and straight). Even in such a linear shape, the elastic thread for leg stretching forms a ring when worn, so that the ring contracts to close the leg firmly inward.

  In addition, in the above embodiment, the back sheet 52, the top sheet 53, and the side sheet 57 are all configured to reach the leg retraction end edge 11. However, the present invention is not limited to this. A structure in which the back sheet 52 and the side sheet 57 reach the end edge 11 may be used.

It is a top view of the expansion-shaped body which shows the disposable diaper which concerns on Embodiment 1 of this invention. It is XX sectional drawing shown in FIG. It is a perspective view showing the form which wore the disposable diaper of Embodiment 1. It is sectional drawing of the leg retraction part in the disposable diaper which concerns on Embodiment 2 of this invention. (A) is the schematic for demonstrating the attachment state of the elastic member in this invention, (b) is a schematic explanatory drawing showing the mode of the sheet | seat in (a), (c) is in patent document 2 It is a schematic explanatory drawing for demonstrating the attachment state of an elastic member, (d) is a schematic explanatory drawing showing the mode of the sheet | seat in (c).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Disposable diaper 11 Leg retraction edge 16, 16a, 16b, 16c, 16d Elastic thread for leg retraction 51 Absorber 51a Side edge of absorber 52 Back sheet 53 Top sheet 57 Side sheet

Claims (5)

In a deployable disposable diaper with an outer shape in which the front abdomen, the crotch part and the back part are continuous and the leg part is depressed,
A plurality of leg-feeding elastic members are attached in an extended state over the entire leg-feeding portion,
The leg elastic member arranged on the side close to the edge of the leg holder among the plurality of leg elastic members has higher contraction force than the leg elastic member arranged on the far side. A disposable diaper characterized by being configured.   The elastic member for leg advancement arranged on the side close to the edge of the leg advancement is attached in a stretched state higher than the elastic member for leg advancement arranged on the far side. Disposable diapers.   The leg elastic member arranged on the side close to the edge of the leg holder has an elastic modulus higher than that of the leg elastic member arranged on the far side. Disposable diapers. The plurality of leg elastic members are materials of the same elastic modulus,
The leg elastic member arranged on the side close to the edge of the leg holder is higher in fineness than the leg elastic member arranged on the far side. The disposable diaper described.   The leg elastic member arranged on the side close to the edge of the leg holder is arranged with a smaller interval than the leg elastic member arranged on the far side. Disposable diapers described in 1.

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