JP2002011039A - Disposable diaper or disposable underpants - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable diaper or disposable underpants with an effective fastening power which prevents a part under the crotch from slipping off after excretion and shows a superb fitness. SOLUTION: The disposable diaper or disposable underpants are provided with at least either an abdominal or a back side waist part gather giving a lower abdomen or a hip part fitness feeling.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper or disposable trouser having a torso gather for giving a fit to a torso, particularly to the lower abdomen and the buttocks.
The present invention relates to a disposable diaper or disposable pants excellent in fitting property that does not slip down even if a crotch portion of the diaper becomes heavy due to water absorption or stool weight after excretion by a wearer.

[0002]

2. Description of the Related 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 both sides of a body (hereinafter simply referred to as both). (May be abbreviated as "diaper") in order to adhere the body to the wearer's torso as a means for forming the sheet material forming the pants from an elastic material such as an elastic nonwoven fabric, or a waist. An elastic thread (for example, “Operon” manufactured by Toray DuPont) or a ribbon-like elastic band made of natural rubber or urethane rubber (hereinafter referred to simply as “elastic member”) Means are provided to be substantially parallel to the waist gather portion and form the body gather on the non-stretchable sheet. Of these, the latter is inexpensive and, for example,
No. 50 and JP-A-4-371147, an elastic member in an extended state is bonded between a back sheet and a top sheet at a position corresponding to a portion below the waist gather, and a waist gather parallel to the waist gather portion is provided. A formed disposable pant is disclosed.

[0003] In the case of continuous production, the above-mentioned conventional body gathers are formed on a belt-like sheet conveyed in the longitudinal direction by bonding an elastic member while extending the elastic member in the flow direction thereof. The gathers 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 waist gathering elastic member 7, and the parallel waist gathering elastic members 9a and 9b are connected to the leg portions 3a.
It can be seen that the elastic member 8 is provided between the elastic member 8 and the elastic member 7 for the waist 2a.

[0004] However, the above-mentioned conventional body gathers,
Since it is provided above the upper end of the leg opening,
Regardless of the absence of waist gathers, it actually works just like waist gathers, indicating that there is no significant change in torso adhesion. Instead, the problem is the slippage of the inseam. That is, after the wearer defecates or urinates, the absorbent body at the crotch of the diaper becomes heavier, but at this time, it is leg waist, not waist gather or torso gather, that supports the weight of the crotch. However, since this leg gather is set to a moderate tension so as not to give a pain to the wearer, it cannot support the weight of the crotch, and as a result, the crotch slips down by its weight. Excretion will adhere to the wearer's thighs.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to simply 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. Aim.

[0006]

A disposable diaper or disposable pants according to the present invention, which has achieved the above objects, is formed by fastening with a fastening tape after wearing the disposable diaper or the pants-shaped disposable diaper, or by bonding both sides of a body. In disposable pants that are formed into a pants-type before being worn, the diaper or the pants are gathered on the abdomen side or the back side or both gathers of the torso gather,
It has a gist in a place having a torso gather that gives a fit to the lower abdomen and buttocks.

[0007] If the body gather is a downwardly curved gather formed to be curved so as to expand in the direction of the crotch, it is effective to prevent the crotch from slipping down. A configuration in which the lowermost portion of the downward curved gather is lower than the uppermost end of the leg opening, and a configuration having an upper curved gather formed by being curved so as to expand in the waist direction together with the lower curved gather, This is a preferred embodiment of the present invention that 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 attached 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.

In addition, the configuration in which the back-side downwardly curved gathers 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 vicinity of the lowermost portion of the downwardly curved gathers becomes a pocket opening, the pockets are opened so as to be more closely attached to a wearer by the elasticity of the downwardly curved gathers. As a result, an adhesion force equal to or higher than that obtained by enhancing the body adhesion with a plurality of elastic members as in the case of the conventional body gathering is exhibited, and the leakage of excrement from the waist opening can be reliably prevented.

It is to be noted that the present invention includes a first step in which an elastic member for waist and leg gathers and an elastic member for torso curved gathers are laterally flown and added to a continuous backsheet in an extended state, and after the first step, A method for producing a disposable diaper or disposable pants including a second step of adhering the absorber and the topsheet on the cross-flow continuous backsheet, and stretching the waist elastic member and the waist elastic gather elastic member to the continuous backsheet. A disposable diaper or disposable pants including a step of attaching in a state and a step of laminating a sheet in which a leg gather is attached on a separate line, an absorbent body and a top sheet, and rotating the sheet 90 degrees on the continuous back sheet. Is also included.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a disposable diaper of the type which is fastened with a fastening tape according to a wearer from a deployed state, or a disposable trouser formed in a pants form before wearing by bonding both sides of a body. A torso curved gather that can effectively prevent the crotch from slipping off is provided.

[0011] The disposable diaper or disposable pants of the present invention is provided with a torso gather that gives a fit to the lower abdomen and buttocks. By adopting this configuration, the weight of the absorbent after excretion, which was conventionally supported only by leg gathers,
Since the downward bending gathers are tightened by the upward tension, the crotch portion of the diaper or the pants does not slip down below the crotch portion and the thigh of the wearer is not stained. It is preferable that at least one of the body gathers is a downwardly curved gather formed so as to be curved so as to expand in the crotch direction. In addition, it is preferable that the lowermost part of the downward curved gather is located below the uppermost end of the leg opening. In the conventional body in which the torso gather is above the leg opening, the upward gathering force of the torso gather is insufficient, and the weight of the absorber cannot be supported.

[0012]

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, and a waist opening 5 is provided at the upper part.
However, a pair of leg openings 6 and 6 are formed in the lower part. 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 bonded in an extended state. Gathers 7 and leg gathers 8 are formed. The trunk of the pants 1 is provided with a downward curved gather 91 which is curved by a similar elastic member so as to expand in the direction of the crotch. In the example shown,
The lowermost portion R of the downwardly curved gather 91 is positioned at the leg opening 6.
Is formed in a curved state so as to be lower than the uppermost end P of. Further, an upwardly curved gather 92 formed to be curved so as to expand toward the waist portion is formed.
In this configuration, a large loop (ring) is formed by the downward curved gathers 91 and the upward curved gathers 92,
This improves the fit of the torso, and is an even more preferable embodiment for preventing the crotch from slipping down due to the annular tightening effect.

The disposable pants 1 have a basic structure in which an absorbent body 4 is sandwiched between a water-permeable top sheet 3 and a water-impermeable back sheet 2. Non-woven fabrics such as polyester, polyester and rayon, and perforated films thereof are used. In addition, for the back sheet, a breathable water-impermeable film that has been subjected to micro-perforation treatment on these materials,
A nonwoven fabric 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 nonwoven fabric and a water-impermeable film are laminated,
A three-layer structure in which two nonwoven fabrics are laminated and a small-area water-impermeable film is laminated thereon (absorber side) is recommended. If the back sheet has a laminated structure, the elastic member for waist and torso curved gathers can be used as a pressing sheet while the other back sheet can be used as a pressing sheet while adhering to one back sheet. .

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 suitable design. In addition, on the top sheet 3,
It is preferable to provide a pair of three-dimensional gathers having a configuration in which an elastic member is attached to one side edge and the other side edge is adhered to the top sheet 3. Excretion leakage can be reliably prevented.

Another embodiment of the body gather of the disposable diaper or pants according to the present invention is shown in FIGS. FIG. 4 is a development view in which descriptions other than a back sheet 2 and an elastic member are omitted.
3 is the same as the disposable pants 1 shown in FIG. 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.

FIG. 4 (a) 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 torso provided on both the abdomen side and the back side. This is a configuration in which the part curved gathers 91 also serve as leg gathers for the remaining leg circumferences.
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. Also,
The waist gathers can be omitted by forming the upper curved gathers 92 near the waist.
Furthermore, if the fastening tape F is attached to the intersection of the upper curved gather and the lower curved gather on both sides on the back side, the fastening tape can be fastened to the wearer simply by fastening the fastening tape according to the wearer. 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.

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. By improving the lifting force of the buttocks absorbent body and making the elastic member for the downwardly curved gathers 911 a clear color so that it can be seen through the back sheet, the pattern will show the shape of the infant's buttocks, which will enhance the design. Will also be an excellent diaper.

FIG. 5A shows an embodiment in which the leg gather 81 is bent in the direction of the body side near the waist portion instead of the upwardly curved gather. Even if the waist gather is not put on the entire waist line, the elastic band G made of, for example, polyurethane foam 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.

As shown in FIG. 5 (b), in the case of a disposable diaper with a fastening tape F, the leg gathers on the back side are not curved but are straight, and the portions other than the portion N indicated by the chain line are backed. Glued to the sheet (not shown, but may be a top sheet or other intervening sheet),
After the fastening tape F is adhered to only the elastic yarns at the N portion (right side in the figure), the tape F is adhered to the back sheet while being pulled toward the body side (left side in the figure), whereby the leg at the back side portion is obtained. The gathers can be curved. At this time, when the fastening tape is fastened according to the wearer, the tightening force of the fastening tape and the tension of the leg circumference cooperate.

FIG. 6 shows a developed view (a) and a perspective view (b) of a disposable diaper having a waist pocket formed therein. The parts other than the back side waist gathers are omitted.
An elastic member for the downwardly curved gather 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 extended 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. When this configuration is adopted, in addition to the effect of the waist gathers described above, the adhesion between the wearer and the diaper is improved by the pocket portion, and even if the wearer turns on the back after defecation or stands upside down. Since the excrement is stopped at the pocket, leakage from the waist can be reliably prevented.

The disposable diaper or disposable pants according to the present invention is not limited to the above embodiment, and the design of the body gathers and the like can be changed within the range defined by the present invention. Conventional non-curved torso gathers may be combined. Also, the configuration illustrated as a disposable diaper is merely for simplification of the illustration, and is not applicable to disposable pants (or vice versa), unless the product shape is not possible.
The various configurations described above are applicable to both disposable pants and disposable diapers. Further, each gather forming elastic member may be partially in a non-extended state.

Specific methods for producing these diapers or pants are not particularly limited. For example, an elastic member for waist and leg gathers and an elastic member for waist and curved gathers (one or more thread-like or The band-like rubber) is attached in a stretched state to the side-by-side continuous backsheet coated with hot melt adhesive (it can be securely adhered by pressing it with another backsheet and passing it through the roller immediately), and then absorbed in the subsequent process Glue the body and topsheet, or flow the waist and torso gathers first, attach to the backsheet, and stack the sheet with the leg gather attached on a separate line, the absorber and the topsheet on the backsheet And a method of mounting the object on the device by a 90-degree rotating means.
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 is sufficient to separate them individually before or after pasting.

[0023]

The disposable diaper or disposable pants according to the present invention is constituted as described above, and the torso is provided with a torso gather that gives a fit to the lower abdomen and buttocks. Even if it increases, the upward lifting force by the torso gather, especially the downward curved gather works,
It has become possible to prevent a diaper or pants from slipping down in the direction of a crotch. Along with downward curved gathers,
In the configuration having the upwardly curved gathers, the body gathers have a large annular shape, and the effect of the gathers trying to expand and contract 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 both gathers, a synergistic effect of the fastening force of the fastening tape and the tension of the waist gathers will be exhibited, and the fit of conventional disposable diapers 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.

In addition, the diaper or the underpants having a beautiful appearance and an improved lifting force at the buttocks can be provided by the configuration in which the downwardly curved gathers on the back side are formed in a substantially W shape. Further, a configuration in which a pocket is provided inside the disposable diaper or disposable pants so that the vicinity of the lowermost portion of the downward curved gathers becomes a pocket opening, the pocket is provided so as to be more closely attached to a wearer by the elasticity of the downward curved gathers. The opening at the waist gives the same or better adhesion than the conventional body gathers, which have been improved with multiple elastic members to improve 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. 4A and 4B are development explanatory views showing another embodiment of the disposable diaper of the present invention.

FIGS. 5 (a) and 5 (b) are development explanatory views showing another embodiment of the disposable diaper of the present invention.

FIG. 6 (a) is a development explanatory view showing another embodiment of the disposable diaper of the present invention, and FIG. 6 (b) 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 upward curved gather P uppermost opening of leg opening R lower curved gather lowermost

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) A61F 13/514 F-term (Reference) 3B029 BC01 BD10 BD13 4C098 AA09 CC03 CC12 CC27 CE05 CE06 CE07 CE09 DD10 DD24 DD25

Claims (1)

[Claims] 1. 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 both sides of a body, wherein the diaper or pants is A disposable diaper or disposable pants having a torso gather that gives a fit to the lower abdomen and buttocks as a gather on the abdomen side and / or back side of the torso gather.