JP3581398B2 - Disposable diapers or disposable pants - Google Patents

Description

[0001]
[Industrial applications]
The present invention is a disposable diaper or disposable pants having a torso, particularly a torso gather that gives a fit to the lower abdomen and buttocks. The present invention relates to a disposable diaper or disposable pants excellent in fitting property that does not slip down even when it becomes heavy.
[0002]
[Prior art]
A disposable diaper formed into a pants-type by fastening with fastening tape after wearing, or a disposable pants formed into a pants-type from before wearing by bonding of both sides of the body (hereinafter, both are simply collectively referred to as “diaper”). (May be omitted)), as a structure for bringing this into close contact with the body of the wearer, means for forming the sheet material forming the pants with an elastic material such as an elastic nonwoven fabric, or a waist opening and a leg An elastic thread (for example, "Operon" manufactured by Du Pont-Toray Co., Ltd.) or a ribbon-like elastic band of natural rubber or urethane rubber (hereinafter collectively referred to simply as an elastic member) is generally referred to as a waist gather portion between the opening portions. Means of being attached in parallel and forming a trunk gather on a non-stretchable sheet have been considered. Since the latter is low-cost, for example, JP-A-4-166150 and JP-A-4-371147 disclose an elastic state of the stretched state between the back sheet and the top sheet at a position below the waist gather. Disposable pants in which members are adhered to form a waist gather parallel to the waist gather are disclosed.
[0003]
By the way, in the case of continuous manufacturing, the above-mentioned conventional body gathers are formed on a belt-like sheet conveyed in the longitudinal direction by bonding while stretching an elastic member in the flow direction thereof. Those that are parallel to the waist gathers are most easily formed in manufacturing. For example, in FIG. 1, an exploded perspective view (a) of the disposable pants disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 4-371147 and a perspective view (b) of the disposable pants viewed from the front side are transcribed. The elastic members 9a and 9b are provided in parallel with the elastic member 7 for waist gathers, and the parallel elastic members 9a and 9b for waist gathers are elastic members 8 for the leg portion 3a and elastic members for the waist portion 2a. It can be seen that it is provided between 7.
[0004]
However, since the above-mentioned conventional torso gathers are provided above the upper end of the leg opening, regardless of the absence of waist gathers, they actually function in the same way as the waist gathers, Gender did not change much. Instead, the problem is the slippage of the inseam. That is, after the wearer defecates or urinates, the absorbent body at the crotch portion of the diaper becomes heavier. At this time, the leg gathers support the weight of the crotch portion, not the waist gather or the torso gather. However, since this leg gather is set to a moderate tension so as not to cause pain to the wearer, it cannot support the weight of the crotch, and as a result, the crotch slips down with its weight. Excretion will adhere to the wearer's thighs.
[0005]
[Problems to be solved by the invention]
In view of the above, an object of the present invention is to provide a disposable diaper or disposable pants having an effective tightening force capable of preventing the crotch portion from slipping off and exhibiting an excellent fit.
[0006]
[Means for Solving the Problems]
The disposable diaper or disposable pants according to the present invention that achieves the above object is a disposable diaper formed into a pants type by fastening with a fastening tape after wearing, or formed into a pants type from before wearing by bonding both sides of a body. In one disposable pants, the diaper or the pants are formed so as to be swollen at least in the direction of the crotch as at least one of the gathers on the abdomen and / or the back of the torso gathers for giving a fit to the lower abdomen. Or, to prevent the pants from slipping down in the crotch direction, have a downward curved gather that is not a leg gather, and have a gist where the lowermost part of the lower curved gather is below the uppermost end of the leg opening. . A configuration having an upwardly curved gather formed so as to bulge toward the waist together with the above downwardly curved gather is a preferred embodiment of the present invention which is more effective in preventing the crotch from slipping down. The lower curved gathers and the upper curved gathers may intersect at both sides of the torso. In this case, the torso curved gathers have a large annular shape to improve the slip-off prevention effect, and in particular, fastening tape is applied to the intersection. By providing this, a synergistic effect of the fastening force of the fastening tape and the tension of the waist gathers is exhibited, so that the fit of the disposable diaper can be further improved.
[0007]
In addition, the configuration in which the downwardly curved gathers on the back side are formed in a substantially W-shape improves the lifting force on the buttocks side and is also cute in appearance. In a configuration in which a pocket is provided inside a disposable diaper or disposable pants so that the lowermost portion of the downwardly curved gathers becomes a pocket opening, the pockets are opened so as to be more closely fitted to a wearer by the elasticity of the downwardly curved gathers. As a result, an adhesion force equal to or greater than that obtained by increasing the body adhesion with a plurality of elastic members as in the case of the conventional body gathers is exhibited, and the leakage of excrement from the waist opening can be reliably prevented.
[0008]
[Action]
The present invention provides a disposable diaper of a type that is fastened with a fastening tape in accordance with a wearer from a deployed state, or a disposable pants formed into a pants type from before wearing by bonding the both sides of the body, to reduce slippage of the crotch. It is provided with a body curved gather that can be effectively prevented.
[0009]
It is necessary that at least one of the body gathers provided on the disposable diaper or disposable pants according to the present invention is a downwardly curved gather formed so as to be curved so as to expand in the crotch direction. The greatest point of the present invention is that the lowermost portion of the downwardly curved gather is located below the uppermost end of the leg opening. By adopting this configuration, the weight of the absorbent body after excretion, which was conventionally supported only by leg gathers, is tightened by the upward tension of the downwardly curved gathers, so that the crotch portion of the diaper or pants is positioned below the crotch. The wearer's thighs do not slip off and become dirty. In the related art in which the trunk gather is above the leg opening, the upward gathering force of the trunk gather is insufficient, and the weight of the absorber cannot be supported.
[0010]
【Example】
FIG. 2 is an explanatory front view showing a typical embodiment of the disposable pants according to the present invention. The left and right sides of the disposable pants 1 are joined to each other, and a waist opening 5 is formed at an upper portion, and a pair of leg openings 6 and 6 are formed at a lower portion. Around the waist opening 5 and the leg opening 6, a thread-like or band-like elastic member (made of natural rubber or synthetic rubber, for example, “Operon” made by Toray DuPont) is intermittently adhered in an extended state. Gather 7 and leg gather 8 are formed. On the trunk of the pants 1, a downwardly curved gather 91 is formed by a similar elastic member so as to bulge in the direction of the crotch, and the lowermost portion R of the gather is always lower than the uppermost end P of the leg opening 6. And is formed in a curved state. Further, an upper curved gather 92 formed to be curved so as to bulge toward the waist portion is formed, and a large loop (ring) is formed by the lower curved gather 91 and the upper curved gather 92. This is an embodiment that is more preferable for preventing the slip-down of the crotch part by the effect of the annular tightening, as well as the fitting property of the crotch part.
[0011]
The basic structure of the disposable pants 1 is a structure in which an absorbent body 4 is sandwiched between a water-permeable top sheet 3 and a water-impermeable back sheet 2. A nonwoven fabric such as rayon or a perforated film thereof is used. In addition, as the back sheet, a breathable water-impermeable film which has been subjected to a fine opening treatment or a non-woven fabric which has been subjected to a water-repellent treatment is used. In order to satisfy the texture, air permeability and waterproofness, the back sheet preferably has a laminated structure of two or more layers. For example, a two-layer type back sheet in which a non-woven fabric and a water-impermeable film are laminated, or a non-woven fabric may be used. A three-layer structure in which two sheets are laminated and a small-area impermeable film is laminated thereon (absorber side) is recommended. If the backsheet has a laminated structure, the elastic member for waist and torso curved gathers can be used as a pressing sheet while another backsheet can be used as a pressing sheet while adhering to one backsheet. .
[0012]
The absorber 4 is formed of fluff pulp, superabsorbent polymer particles, and heat-fusible fibers for improving shape retention, and can be designed in an hourglass shape, a rectangular shape, or any other appropriate design. A pair of three-dimensional gathers may be provided on the top sheet 3 such that an elastic member is attached to one side edge and the other side edge is bonded to the top sheet 3. Preferably, this can reliably prevent excrement leakage from the leg opening.
[0013]
3 and 4 show an embodiment of a body gather of a disposable diaper or pants according to the present invention. FIG. 4 is a development view in which descriptions other than a back sheet 2 and an elastic member are omitted. A waist gather 7, a leg gather 8, a lower torso curved gather 91, and an upper torso curved gather 92 are formed. The torso gathers may be formed not only on the abdomen side as shown in FIGS. 2 and 3, but also on the back side only, or may be formed on both.
[0014]
FIG. 4A shows a disposable diaper type with a fastening tape F, in which leg gathers 8 are formed in a straight line only at a portion corresponding to a crotch, and a lower waist curved gather provided on both the abdomen side and the back side. In this configuration, the legs 91 also serve as leg gathers for the remaining leg portions. By adopting this configuration, even in the conventional disposable diaper, the adhesion around the leg can be further improved, and of course, the effect of preventing slippage due to the body gathers is also exhibited. Further, the waist gathers can be omitted by forming the upward curved gathers 92 near the waist portion. Furthermore, if the fastening tape F is attached to the intersection of the upwardly curved gathers and the downwardly curved gathers on both sides on the back side, just by fastening the fastening tape according to the wearer, the fastening force of the fastening tape and the body The synergistic effect of the tension of the curved gathers provides excellent fit to the entire torso. Therefore, there is no need to attach a large area or a plurality of fastening tapes, which eliminates the tight tightening feeling of the tapes and helps to reduce costs.
[0015]
FIG. 4B shows another embodiment, in which a downwardly curved gather 911 on the back side has a substantially W-shaped curved state having two lowermost portions. The lifting force of the buttocks absorber is improved, and the elastic member for the downwardly curved gathers 911 is made a clear color so that it can be seen through the back sheet. Will also be an excellent diaper.
[0016]
FIG. 5A shows an embodiment in which the leg gather 81 is bent toward the trunk side near the waist portion instead of the upward curved gather. Even if the waist gather is not put on the entire waist line, the elastic band G made of, for example, foamed polyurethane may be provided at the position shown in the figure (between the left and right leg gathers of the waist line) to obtain the waist tightening force. it can. A similar configuration may be adopted on the abdomen side.
[0017]
Further, as shown in FIG. 5 (b), in the case of a disposable diaper with the fastening tape F, the leg gathers on the back side are not curved but remain straight, and the portions other than the portion N indicated by the dashed line (see FIG. Although not shown, a top sheet or another sheet for interposition may be used), and the fastening tape F is adhered to only the elastic yarn of the N portion (right side in the figure), and then the tape F is pulled in the direction of the body side. By adhering to the back sheet (left side in the figure), the leg gather on the back side can be curved. At this time, if the fastening tape is fastened according to the wearer, the tightening force of the fastening tape and the tension of the leg circumference cooperate.
[0018]
FIG. 6 shows a development view (a) and a perspective view (b) of a main part of a disposable diaper having a waist pocket. The parts other than the back side curved gathers are omitted. The elastic member for the downward curved gathers 91 is attached in an extended state to an extended portion E (which may be a separate member sheet) extended in the product longitudinal direction so that the back sheet can be folded back at the waist portion, and only the pocket portion 101 is attached. When the adhesive is applied and the extension portion E is folded back at the waistline W and overlapped with the diaper main body, the pocket portion is opened by the elastic force of the elastic member near the pocket opening. I have. By adopting this configuration, in addition to the effect of the torso-gathered gathers described above, the adhesion between the wearer and the diaper is improved by the pocket portion. Since the excrement is stopped at the pocket portion, leakage from the waist portion can be reliably prevented.
[0019]
The disposable diaper or disposable pants according to the present invention is not limited to the above embodiments, and the design of the body gathers and the like can be changed within the range defined by the present invention. It is also possible to combine a torso gather that is not performed. Further, the configurations illustrated as disposable diapers are merely for simplification of the illustration, and are not applicable to disposable pants (or vice versa), and unless the product shape is impossible, the above various configurations are not applicable. Is applicable to both disposable pants and disposable diapers. Further, each gather forming elastic member may be partially in a non-extended state.
[0020]
Specific methods for producing these diapers or pants are not particularly limited. For example, elastic members for waist and leg gathers and elastic members for waist curved gathers (one or more thread-like or belt-like rubbers) In a stretched state on a continuous backsheet that has been coated with hot-melt adhesive (it can be firmly adhered by pressing it with another backsheet and passing it through a roller immediately). Glue the sheet, or waist and waist gathers first, then attach to the back sheet, stack the sheet with the leg gather attached on a separate line, the absorber and the top sheet 90 degrees on the back sheet There is a method of putting on by rotating means or the like. In the case of disposable pants, separate the continuous sheet and fold it back and forth, then join both sides by means such as heat bonding or ultrasonic welding.In the case of disposable diapers, attach fastening tape and frontal tape Then, it may be separated individually before or after pasting.
[0021]
【The invention's effect】
The disposable diaper or disposable pants according to the present invention is configured as described above, and the lower curved gathers are formed on the body, so that even when the weight of the absorber increases after excretion, the upwardly-curved lifting force by the downward curved gathers works. Thus, the diaper or the pants can be prevented from slipping down in the inseam direction. In the configuration having the upwardly curved gathers together with the downwardly curved gathers, the effect of the gathers that the trunk gathers have a large annular shape and expands and contracts toward the center of the loop further improves the slip-off prevention effect. In particular, if the fastening tape is provided at the intersection of the two gathers, a synergistic effect of the tightening force of the fastening tape and the tension of the waist curved gathers is exhibited, so that the fit of the conventional disposable diaper can be greatly improved, Fastening tape can be reduced in area. In the configuration in which the leg gathers are curved instead of the upwardly curved gathers, it is possible to link the fastening tape and the leg gathers, or to substitute a part of the waist gathers with the leg gathers.
[0022]
In addition, a diaper or pants having a beautiful appearance and an improved lifting force at the buttocks can be provided by the configuration in which the back-side downward gathers are formed in a substantially W shape. Furthermore, a configuration in which a pocket is provided inside a disposable diaper or disposable pants so that the lowermost portion of the downwardly curved gathers becomes a pocket opening, the pocket is formed so as to be more closely attached to a wearer by the elasticity of the downwardly curved gathers. The opening at the waist gives the same or better adhesion than that of the conventional body gathers with multiple elastic members that enhance the body's adhesion, and also reliably prevents excretion from leaking from the waist opening I can do it. The disposable diaper or disposable pants according to the present invention is effective not only for infants and adults, but also for mild to severe incontinence.
[Brief description of the drawings]
FIG. 1A is an exploded perspective view of a conventional disposable pants having a waist gather, and FIG. 1B is a perspective view seen from a front side.
FIG. 2 is an explanatory front view showing an embodiment of the disposable pants according to the present invention.
FIG. 3 is a development explanatory view schematically showing the disposable pants according to the present invention shown in FIG. 2;
FIGS. 4 (a) and (b) are development explanatory views showing another embodiment of the disposable diaper of the present invention.
FIGS. 5 (a) and (b) are development explanatory views showing another embodiment of the disposable diaper of the present invention.
FIG. 6A is a development explanatory view showing another embodiment of the disposable diaper of the present invention, and FIG. 6B is a perspective view of a main part.
[Explanation of symbols]
Reference Signs List 1 disposable pants 2 back sheet 91 downward curved gather 92 upper curved gather P leg opening uppermost edge R lower curved gather lowermost

Claims (7)

In a disposable diaper formed into a pants-type by fastening with a fastening tape after wearing, or a disposable pants formed into a pants-type from before wearing by bonding of both sides of the body, the diaper or the pants has a fit to the lower abdomen. The gathers on the abdomen and / or back side of the torso gathers are formed so as to be curved so as to expand at least in the crotch direction, and prevent the diaper or pants from slipping down in the crotch direction, and leg gathers. A disposable diaper or disposable pants, characterized in that the disposable diaper or disposable trouser has a downward curved gather, the lowermost of which is below the uppermost end of the leg opening. The disposable diaper or disposable pants according to claim 1 , wherein the torso gather has an upwardly-curved gather formed so as to bulge toward the waist. The disposable diaper or disposable pants according to claim 2 , wherein the lower curved gather and the upper curved gather intersect at both sides of the trunk. The disposable diaper or disposable pants according to any one of claims 1 to 3 , wherein the lower curved gather is provided at least on the back side, and the lowermost end of the lower curved gather is formed in a substantially W shape. As the bottom vicinity of the lower curved gather is pocket opening, a disposable diaper or disposable pants according to claim 1 in which the pocket is provided inside the disposable diaper or disposable pants. A claim 1 disposable diaper or disposable pants method according with lower curved gather formed by bending so as bulge crotch direction,
A first step of flowing the elastic member for waist and leg gathers and the elastic member for torso curved gathers in a stretched state to the continuous backsheet;
A method for producing a disposable diaper or disposable pants, comprising a second step of adhering an absorbent body and a top sheet onto the continuous backsheet after the first step. A claim 1 disposable diaper or disposable pants method according with lower curved gather formed by bending so as bulge crotch direction,
A step of laterally flowing the elastic member for the waist and the elastic member for the torso curved gather and attaching the stretched state to the continuous backsheet;
A method of manufacturing disposable diapers or disposable pants, comprising a step of laminating a sheet having leg gathers attached on separate lines, an absorbent body and a top sheet and rotating the sheet on the continuous backsheet by 90 degrees. .

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