JP3455247B2 - Pants-type disposable diapers - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pants-type disposable diaper for infants, incontinents and adults.
More specifically, the present invention relates to a pants-type disposable diaper capable of improving the fottability and improving the leakage prevention performance. 2. Description of the Related Art In most conventional pants-type disposable diapers, a so-called flat type disposable diaper in which a flat body is applied to a wearer and stopped with a tape fastener located on a side portion (a waist side surface) is used in most cases. there were. On the other hand, in recent years, a so-called pants-type disposable diaper has been developed in which the side portions are joined and fixed in advance without using a tape fastener. Various techniques have been proposed as such a pants type, for example, a type in which gathers are provided at a waist portion and a leg portion (JP-A-58-115106, JP-A-58-115107, Kaisho 61-
207605, JP-A-62-231005, etc.). All of these pants-type diapers are worn in a standing position, similar to normal underwear, and are used for toilet training to promote "diaper valley" for not only infants but also for older children, or for incontinents or walking. It is intended for use as a possible adult. [0003] Disposable diapers of this type are characterized in that they can be put on and taken off by the wearer by themselves or by a caregiver, as in ordinary underwear, as compared with so-called flat diapers. In addition, functions such as absorbability of body fluids, fit to prevent excretion from leaking, follow-up to activities, and wearability are required. In order to respond to such a demand, Japanese Unexamined Patent Publication (Kokai) No. 2-4364 discloses a method in which an elastic side panel (side member) is provided on a side portion of the main body where the abdomen and the back are bonded, A configuration in which elastic members at the abdominal end and the back end of the main body are arranged is disclosed.
Japanese Patent Laid-Open Publication No. 3-82467 discloses that the elastic elastic members around both legs are composed of first and second members, and the two members are positioned substantially at the center of the crotch at the center of the two members so that the fit of the crotch is improved. There is disclosed a configuration in which leakage is prevented by raising the pressure. [0004] However, these disposable diapers have a problem in that the width of the absorber at the crotch portion is relatively narrow, and the diapers often leak from around the wearer's legs. That is, in a pants-type diaper as disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 2-4364, the side panel is made of a single member, and the elastic properties of each part are the same. However, this results in useless compression between the wearer and impairs the ease of putting on and taking off and the wearability. Further, since the side panel is formed separately from the main body to which the side panel is attached, there is a problem that the number of parts increases, the manufacturing process becomes complicated, and the cost increases. In the pants-type diaper type disclosed in Japanese Patent Application Laid-Open No. 3-82467, elastic elastic members around both feet are composed of first and second members, and a central portion of both members is a crotch portion. It is described that the elastic elastic member lifts the crotch area at a substantially central portion so as to raise the crotch area, and prevents leakage from the crotch part by making close contact with the body. However, in practice, the diaper slips due to a change in body position due to the activity of the infant, and urine may leak from the gap between the diaper and the body, and the relationship with the width of the absorber has not been sufficiently improved. [0006] Further, since the elastic elastic member of the leg opening of the conventional pants-type diaper is usually arranged relatively close to the absorber, it can expand and contract sufficiently under the influence of the rigidity and bulkiness of the absorber. Or the inability to fit around the wearer's legs, resulting in leakage of excrement from the gap between the wearer and the diaper, lack of followability for the wearer's activity, and the problem of the diaper slipping down. there were.
Further, the pants-type diaper has a narrow crotch portion for improving fit, but in this case, the absorption capacity of the body fluid is reduced, so the elasticity of the elastic elastic member is strengthened to compensate for the leakage. . However, since the diaper is in close contact with the skin around the excretory part of the crotch, excretions come into strong contact with each other, which causes dirt and rash on the skin. Therefore, the object of the present invention is the absorption of body fluids, the fit of excrement leakage, the ability to follow the activity, the ease of putting on and taking off, especially when worn on the wearer, the biggest drawback of conventional pants-type diapers. An object of the present invention is to provide a pants-type disposable diaper that is excellent in leakproofness and wearing properties of certain excrement. As a result of various studies on the structure of a pants-type disposable diaper, the present inventors have specified the width of the crotch of the absorber, and have elastic elastic members at the leg openings. It has been found that the above-mentioned object can be achieved by specifying the positional relationship between the elastic member and the leg opening, and further devising the position where the elastic elastic member is stretched and fixed at the leg opening. The present invention has been made based on the above findings, has a liquid-permeable top sheet, a liquid-impermeable back sheet and an absorber interposed between these two sheets, the absorber is abdominal, Elastic elastic members are provided along the periphery of the waist opening and the pair of leg openings, which are divided into a crotch part and a back part, and the opposite side parts of the abdomen part and the back part are joined and fixed. In a pants-type disposable diaper, the width of the absorber at the crotch is 40 to 80 mm at the narrowest part, from the side edge of the crotch to the elastic elastic member provided along the peripheral edge of the leg opening. The region where the distance is the largest is 60 to 100 mm , and the region where the width of the absorber is the smallest is present in the crotch, and the absorber is wider than the crotch in the back part and the abdomen. Has an hourglass shape, elastic expansion and contraction of the leg opening The member is stretched and fixed along the periphery of one leg opening and inward at the center of the crotch, across the crotch of the absorber and again along the periphery of the other leg opening. A pants-type disposable diaper is provided. According to the pants-type diaper of the present invention, while the width of the crotch absorber is narrow, the distance between the peripheral edge of the leg opening in which the elastic member is provided and the side edge of the crotch is wide. For this reason, the gather formed by the elastic expansion and contraction member works effectively without being affected by the rigidity of the crotch absorbent, and it is possible to effectively prevent the excrement from leaking at the crotch, and to improve the wearability and the wearability. Ease of removal is improved. When the rate of excretion is high, there is also a function of temporarily retaining excrement that cannot be absorbed by the absorber in a region between the peripheral portion of the leg opening and the side edge of the crotch portion to prevent leakage. Furthermore, gathers are formed by traversing the elastic elastic member at the center of the crotch ,
Even if such gathers are formed , because the width of the absorber is narrow,
The influence of the rigidity is small, and the fit of the absorber at the crotch portion is further improved by the expansion and contraction action of the gather from the belly or the back side to the crotch portion. A preferred embodiment of a pants-type disposable diaper according to the present invention will be described below with reference to the drawings.
The pants-type disposable diaper shown in FIG.
Example is a pants-type disposable shown in FIG. 1 and FIG.
The diaper is a reference example of the present invention. In the embodiment shown in FIG.
The pants-type disposable diaper has elastic extension of the leg opening 12.
1 except that the stretched and fixed positions of the compression members 81 and 82 are different.
The configuration is almost the same as that of the reference example shown in FIG.
The same members as those in the reference example are shown in FIG.
The same reference numerals are given and the detailed description is omitted. Follow
First, a reference example will be described with reference to FIGS.
Then, this embodiment will be described with reference to FIG.
In each figure, FIG. 1 is a perspective view showing a pants-type disposable diaper of a reference example of the present invention , and FIG. 2 is an inner view when the disposable diaper of FIG. 1 is separated at a waist side portion. FIG.
Is an inner view when the pants-type disposable diaper of one embodiment of the present invention is separated at a waist side portion (a diagram corresponding to FIG. 2).
It is. The pants-type disposable diaper 1 of the reference example is
As shown in FIG. 1, a liquid-permeable top sheet (top sheet) 2, a liquid-impermeable back sheet (back sheet) 3, and an absorber 4 interposed between these two sheets. The contact part 4A (abdominal part), the crotch part 4B and the back contact part 4C (back part) are divided, and the belly contact part 4A and the back contact part 4 are separated.
The point that an elastic elastic member is provided along the periphery of the waist opening 11 and the pair of leg openings 12 and 12 formed by joining and fixing the opposite side portions 71 and 72 of C to each other is the same as a conventional pants-type disposable diaper. It is. The pants-type disposable diaper 1 of the reference example is 40 to 80 mm at the narrowest portion of the absorber 4 at the crotch portion 4B, and extends from the crotch side edge 41 of the absorber 4 to the peripheral portion of the leg opening 12. 60 the largest site distance to resilient and elastic members 8 provided along the
１００100 mm . The pants-type disposable diaper 1 of the reference example will be further described. As shown in FIG.
A liquid-permeable top sheet 2 forming a side in contact with the wearer's skin, an impermeable back sheet 3 corresponding to the top sheet 2 and in contact with underwear, and fixed in a state positioned between these two sheets. And an absorber 4 for absorbing excrement.
The top sheet 2 and the back sheet 3 are further extended in the longitudinal direction from the belly contact portion 4A and the back contact portion 4C of the absorber 4 in a superimposed state, and the extended portions, that is, the waist flaps 5 is provided with an elastic elastic member 6.
The elastic elastic member 6 forms a gather of the waist opening 11. In addition, the top sheet 2 and the back sheet 3 are overlapped, and the abdominal contact portion 4A to the back contact portion 4
C further extend in the width direction, and elastic portions 8, 8 are provided at their extending portions, ie, at the crotch portions of the side flaps 7, 7.
Is provided. The elastic expansion members 8, 8 are connected to the leg opening 1.
2, 12 gathers are formed. As shown in FIG. 2, when the side flaps 7, 7 of the pants-type disposable diaper 1 are separated from each other on both sides 71, 72, the disposable diaper 1 has an hourglass shape in which the crotch region of the absorber 4 is narrowed. Is formed. Further, the crotch region of the top sheet 2 and the back sheet 3 is also curved in accordance with the shape of the absorber 4 as described above, and the respective elastic elastic members 8 of the side flaps 7 are substantially curved as described above. It is stretched between the sheets 2 and 3 along the portion, and is configured to be able to contract in a free state to form the leg gathers shown in FIG. 1 so as to fit the crotch region. In addition, it is preferable that the both sides 71 and 72 be joined so that the feel of the part is flexible even after joining. For example, a hot-melt type adhesive or a material which can be joined by ultrasonic wave is used. Can be. The length is 2-100
mm, more preferably 15 to 50 mm
It is. [0013] resilient and elastic members 8 above Symbol leg openings 12,
As shown in FIG. 2, the side flaps 7 are curved inwardly, substantially along the periphery of the leg opening 12, and
Distance H from the side edge 41 of the crotch portion 4B is provided to be 60~100mm the largest sites. Distance H
Has a 60mm is San Reference Example. If the distance H is less than 50 mm, the rigidity and the like of the absorber 4 may affect the gathers, thereby deteriorating the fit of the disposable diaper itself. The width W at the crotch 4B is 40 to 40 at the narrowest part.
It is 80 mm, and is 60 mm in the reference example. When the width W is 100 mm or more, the rigidity of the absorbent body 4 may affect the cather, the fitting property of the disposable diaper itself may be deteriorated, and the leakproof property of the excrement of the disposable diaper may not be sufficiently exhibited. is there. The above-mentioned top sheet 2 and back sheet 3
The material used for the absorbent body 4 may be a material known per se, which is already used for disposable diapers and other sanitary articles, and there is no particular limitation on its use. However, a preferable material of the top sheet 2 is a liquid-permeable sheet that allows excrement to permeate into the absorber 4 and has a feeling similar to underwear. Such a liquid-permeable sheet is, for example, a woven fabric. There are cloth, nonwoven fabric, porous film and the like. Also, by giving the top sheet 2 a function,
Water-repellent treatment is performed by applying a hydrophobic compound such as a silicone oil agent or paraffin wax to the periphery or by applying a hydrophilic compound such as an alkyl phosphate ester on the entire surface in advance and washing the periphery with warm water. Alternatively, a material that can prevent leakage due to bleeding of urine or the like on the periphery may be used. Further, as the preferable back sheet 3, a stretched liquid-impermeable sheet which is made by adding a filler to a thermoplastic resin and which allows vapor to pass therethrough is preferable, and a sheet having a feeling close to underwear is preferable. Such a liquid impermeable sheet includes, for example, a composite material of a film and a nonwoven fabric. The preferred absorber 4 is preferably a combination of a high-molecular-weight water-absorbing polymer mainly composed of defibrated pulp, and a heat-treated mixture of a thermoplastic resin, cellulose fibers, and a high-molecular-weight water-absorbing polymer. The location of the high-molecular-weight water-absorbing polymer may be any of the upper layer, the middle layer, and the lower layer, or may be a mixture with pulp. Further, the high molecular water-absorbing polymer has a holding performance of absorbing and holding a liquid 20 times or more its own weight, and is preferably in the form of particles having a gelling property. For example, a starch-acrylic acid (salt) graft copolymer, a saponified starch-acrylonitrile copolymer, a crosslinked sodium carboxymethyl cellulose, an acrylic acid (salt) polymer, and the like are preferable. The elastic elastic members 6, 8 used in the disposable diaper 1 are preferably thread rubber, flat rubber, film type rubber or film-like foamed polyurethane.
Preferably, the stress at 150% elongation is 70 to 100 grams, and the elastic elastic member 8 is preferably a nonwoven fabric type having elasticity and air permeability. In the pants-type disposable diaper 1 of the reference example configured as described above, the width W of the crotch portion 4B of the absorber 4 is narrow, and the elastic elastic member 8 of the leg opening 12 has the rigidity of the absorber 4 Since it is located at a position that is not affected at all, it has a fitting property to the absorber 4 in the crotch part, and leakage of body fluid can be effectively prevented. Next, an embodiment of a disposable diaper of pants-type according to the present invention will be described with reference to FIG. Fig. 3 (a)
FIG . 3 is an inner view (corresponding to FIG. 2) when the pants-type disposable diaper according to one embodiment of the present invention is separated at a waist side portion. The disposable diaper 10 of the pants-type according to this embodiment is configured substantially similar to the reference example shown in FIG. 1, the same reference numerals in Figure 3 for members similar to members of the reference example shown in FIG. 1 subjected to the detailed explanation thereof will be omitted, where different from the reference example of FIG. 1, resilient and elastic members 81, 82 of the leg openings 12, along the periphery of one leg opening, and in the crotch portion center a point which is stretched fixed along again the periphery of the other leg opening 12 across the crotch portion 4B of the absorbent member 4 in its inwardly. More specifically, the elastic elastic member 81
Is disposed on the back abutment side of the disposable diaper 10, and deviates from the peripheral edge of the side flap 7 at a position substantially at the center of the crotch,
The crotch portion 4B of the absorbent body across is stretched. Also,
The resilient and elastic members 81 disposed on the ventral abutment side of the disposable diaper 10, in a substantially central position of the crotch portion, then the peripheral edge portion of the side flaps 7, the crotch portion 4B transverse to is stretched to the absorber < br /> In such pants-type disposable diaper 10 of the structure, in addition to achieving the same effects as the reference example shown in FIG. 1, without being affected by rigidity of the absorber 4 most resilient and elastic members 81, 82 Is the crotch 4B of the absorber 4
It acts in the cross direction to form gathers, enhances the fit of the wearer in the crotch area, and makes it difficult for the diaper to slip even when there is a change in body position due to the activity of the infant. According to the pants-type disposable diaper according to the present invention, the absorbent for body fluids, the fit for excretion does not leak, the ability to follow the activity, the ease of putting on and taking off, and especially to the wearer. In this case, the pants-type diaper of the related art is excellent in leakage prevention and excrement, which are the biggest drawbacks.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a pants-type disposable diaper according to a reference example of the present invention . FIG. 2 is an inner view when the disposable diaper of FIG. 1 is separated at a waist side portion and a sectional view of a crotch portion thereof. FIG. 3 is an inner view when the pants-type disposable diaper according to one embodiment of the present invention is separated at a waist side portion, and a cross-sectional view of a crotch portion thereof (corresponding to FIG. 2) . [Description of References] 1, 10 Disposable diaper 2 Top sheet 3 Back sheet 4 Absorber 4B Absorber crotch 5 Waist flap 6, 8 Elastic elastic member 7 Side flap 11 Waist opening 12 Leg opening 81, 82 Elastic elastic member

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A61F 13/15-13/84 A61F 5/44

Claims (1)

(57) [Claims 1] A liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber interposed between these sheets. Divided into crotch and back,
A pants-type disposable diaper in which an elastic elastic member is provided along a peripheral portion of a waist opening and a pair of leg openings formed by joining and fixing opposite side portions of the abdominal portion and the back side portion. 40-80 at the narrowest part of the crotch
mm, the portion where the distance from the side edge of the crotch portion to the elastic elastic member provided along the peripheral edge of the leg opening is the largest is 60 to 100 mm , and the region where the width of the absorber is narrowest is Present in the inseam,
The absorber has an hourglass shape wider than the crotch portion at the back portion and the abdomen portion, and the elastic elastic member of the leg opening extends along the periphery of one leg opening and at the crotch portion. A pants-type disposable diaper characterized in that it is deflected inward at the center, crosses over the crotch portion of the absorber, and is stretched and fixed again along the periphery of the other leg opening.