JP3165349B2 - Disposable diapers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper formed by fastening both sides of a waist with a fastening tape when worn to form a pants-type disposable diaper. More specifically, the disposable diaper has good adhesion to wearers of various sizes. The present invention relates to a disposable diaper for adults or children that can be replaced many times when worn.

[0002]

2. Description of the Related Art Disposable diapers are made by pulverized pulp, highly water-absorbent resin or hot-melt fiber between a liquid-impermeable back sheet (made of plastic sheet) and a liquid-permeable top sheet (non-woven fabric made of synthetic fiber). It is configured by loading an absorber molded from the above. FIG. 4 shows a general plan shape of a disposable diaper of the type formed into a pants type when worn using a fastening tape. As you can see the position of the tape,
FIG. 4 illustrates the backsheet side of the diaper (the side not in contact with the body). The disposable diaper D has a substantially hourglass shape, and ears E for covering both sides of the waist when worn are formed on the left and right sides of the abdominal side F and the back side B of the diaper. Is provided with a pair of fastening tapes 50 on the left and right. This fastening tape 5
The frontal tape 60 provided on the back sheet 20 on the abdomen side F when worn is coated with an adhesive.
It is configured so that it can be formed into a pants-type by adhering to the pants.

[0003] Elastic bands 30, 3 made of urethane foam or the like are provided near the abdomen side edge and the back side edge of the diaper.
0 is attached to the top sheet and / or the back sheet to form a waist gather, and a notch K for a leg is formed on the left and right sides of the center. An elastic body 40 is attached between the top sheet and the back sheet in an extended state, and becomes a leg gather after being formed in a pants shape.

In addition, rising gathers (extending elastic bodies are attached to the rising ends) are disposed in the longitudinal direction on both sides of the upper surface of the top sheet, near the center of the leg elastic bodies, There is also a configuration in which a pocket for preventing urine leakage is formed.

The frontal tape 60 has a relatively rigid plastic sheet firmly adhered to the back sheet so that the back sheet of the diaper is not broken when the fastening tape 50 is attached and detached many times. It is configured. A pair of fastening tapes 50 is sufficient for a disposable diaper for children, but a plurality of pairs of fastening tapes are provided for an adult for ensuring and firmly retaining a pants-type shape.

As the fastening tape 30, in addition to a tape coated with an adhesive, a tape using a mechanical hook-and-loop fastener (known as a "magic tape") is also considered. For example, JP-A-1-162802 discloses that
Either the hook member or the loop member constituting the hook-and-loop fastener is attached to the fastening tape, and either the hook member or the loop member detachably engaged with the hook member or the loop member is attached over a large area on the back sheet on the abdomen side, A configuration in which the diaper can be replaced any number of times by attaching and detaching both members is disclosed.

[0007]

Regardless of the configuration using the frontal tape or the configuration using the hook-and-loop fastener, when the disposable diaper is formed into a pants-type and worn, the circumference of the waist is actually the size of the wearer. The function to adjust to fit is in the fastening tape rather than the waist gather. That is, the fastening or fastening position of the fastening tape determines the waist circumference. The waist gather is configured to be stretchable,
The front side of the abdomen is provided with high rigidity frontal tape or non-stretchable hook-and-loop fastener over a wide area, so that the waist gather is applied only to the waist in the vicinity of the waist in any configuration. . The waist gathers and the leg gathers are provided with an expectation of an action of preventing leakage from around the waist and the legs, rather than ensuring fit.

[0008] Due to the above configuration, conventional diapers have poor adhesion to a wearer. Especially on the abdominal side, it could be said that there was almost no adhesion due to the presence of frontal tape and hook-and-loop fastener.

Another factor that lowers the adhesiveness of the diaper is the hardness of the absorber. That is, since the absorber in the diaper is relatively hard and is formed on a flat plate, even if it is formed into a pants type, it is difficult to deform along the body of the wearer. However, if the absorber is not formed to a certain degree of hardness, the absorber may be kinked or broken by the movement of the wearer, and the absorber may be broken by the weight of the absorbed urine, which is commercially available. In many products, thermoplastic fibers are added to the constituent material of the absorber, and the shape retention of the absorber is ensured by means such as heating and compression. This is because the softness of the absorber must be sacrificed, but there is a high demand for shape retention. Finally, it is technically difficult to change the hardness of the absorber to improve the adhesion of the disposable diaper. Therefore, an object of the present invention is to provide a disposable diaper that improves the tightness of the disposable diaper and improves the feeling of wearing.

[0010]

SUMMARY OF THE INVENTION The present invention, which has achieved the above object, is directed to a disposable diaper formed in a pants-type at the time of use with a fastening tape. A waist gather is formed with the elastic yarns attached thereto, and at least a pair of fastening tapes are disposed on both side edges in the width direction on the back side of the diaper, and the fastening tape is provided on the outermost layer on the abdomen side. Are separately provided on the left and right sides of the diaper, and a plurality of elastic threads different from the waist elastic threads are provided on the left and right sides. It has a gist where it is attached widely between the parts along the diaper width direction. The elastic yarn between the locking portions is attached to the absorber without overlapping, and also on the back side of the diaper, another elastic yarn other than the elastic yarn for the waist portion is provided along the diaper width direction. The configuration provided widely without overlapping the diaper is a more preferable mode for improving the adhesion of the diaper.

A hook member of a mechanical hook-and-loop fastener is attached to the fastening tape, and the locking portion is a loop member of the mechanical hook-and-loop fastener, or has a basis weight of 18-70.
g / m ² non-woven fabric may be employed.

[0012]

[Function] By arranging a retaining portion on the outermost layer on the abdomen side of the disposable diaper, which is capable of detachably securing a fastening tape on the left and right sides of the diaper, the range in which the elasticity of the waist gather can be extended. Spreads between the locking parts. In addition, apart from the waist elastic yarn, a large number of elastic yarns are widely attached between the left and right locking parts, so that most of the abdomen side is configured to be stretchable and adherent to the wearer. Has improved significantly. Since these elastic yarns are provided so as not to overlap the absorber, the elasticity of the elastic yarns is not hindered by the rigidity of the absorber. Further, by providing a plurality of elastic yarns on the back, even better adhesion can be obtained.

Further, by disposing the fastening tape detachable from the locking portion, the diaper can be replaced many times by the work of attaching and detaching the fastening tape and the locking portion. Therefore, the diaper of the present invention can be used in combination with auxiliary pads and the like to replace only these auxiliary pads in the case of mild incontinence or after a small amount of urination. As the fastening tape, it is preferable to use a tape to which a hook member constituting a mechanical hook-and-loop fastener is attached, and if a hook-and-loop member is used for the locking portion, high durability against replacement work is exhibited. . The hook member can be configured to be detachable even if a non-woven fabric having a relatively high basis weight of 18 to 70 g / m ² is used as the locking portion, and the durability is slightly lower but inexpensive.

[0014]

1 is an explanatory perspective view showing one embodiment of the present invention, and FIG. 2 is a partially exploded explanatory view seen from a top sheet side of the disposable diaper shown in FIG. The disposable diaper D includes an outermost sheet 10 and an absorbent body 2 disposed inside the outermost sheet 10.
As a basic member. The absorber 2 is loaded between a rectangular liquid-impermeable sheet 21 and a liquid-permeable sheet 22, and the peripheral edges of these sheets are adhered. Absorber 2
Is mixed with pulverized pulp, superabsorbent resin, thermoplastic fiber, etc., heated and compressed while being heated, and is covered with thin paper as needed. As the liquid-impermeable sheet 21, a sheet made of polyolefin or the like (which may have fine holes) is used, and as the liquid-permeable sheet 22, a synthetic fiber nonwoven fabric is used. On the upper surface side of the liquid permeable sheet 22, rising gathers 16 made of a nonwoven fabric subjected to a water-repellent treatment (only the left side is shown in FIG. 2).
An elastic body 16a that is extended in the longitudinal direction is preferably attached to the center of the rising gather.

The outermost sheet 10 is made of two synthetic fiber nonwoven fabrics 11 and 12 (the materials of which may be the same or different) in the form of dots or lines (spirals or irregular shapes). (Including the hot melt adhesive) applied to the adhesive. At the longitudinal ends of the abdomen side F and the back side B, a plurality of waist elastic yarns 41, 41 are provided.
Are extended along the width direction (parallel to the edge), and a waist gather is formed over the entire end portion. Further, a plurality of other leg elastic threads 42, 42 are attached to the periphery of the leg cutouts K, K to form leg gathers. These elastic yarns are intermittently bonded between the nonwoven fabrics 11 and 12.

Two pairs of fastening tapes 5 are arranged on both side edges of the ear portion E on the back side B. A hook member 51 of, for example, a mechanical hook-and-loop fastener is provided on the tip side of the fastening tape 5. On the other hand, a pair of locking portions 52 are provided on the outer surface of the outermost sheet 10 at the ear portion E on the abdomen side F. As the locking portion, a loop member of a mechanical hook-and-loop fastener detachable from the hook member 51 is preferably used. Of course, the hook member and the loop member may be used in reverse. When a diaper is manufactured at a lower cost, a configuration in which the non-woven fabric having a relatively high rigidity with a basis weight of 18 to 70 g / m ² may be employed. Alternatively, a fastening tape to which an adhesive is applied may be used, and a plastic frontal tape may be attached to the locking portion.

In the present invention, a part of the fastening tape 5 may be made of a stretchable material, and a hook member 51 (or a pressure-sensitive adhesive layer) may be provided at a tip portion to impart stretchability to the fastening tape. The number of the fastening tapes 5 is not limited to two, but may be one or more. The left and right ear side edges may be joined in advance.

It is necessary that a plurality of elastic yarns 43 besides the waist elastic yarns 41 be provided between the two locking portions on the abdomen side F. That is, the outermost sheet 1
A plurality of elastic yarns 43 in the stretched state are adhered along the width direction of the diaper (substantially parallel to the longitudinal edge) between the two nonwoven fabrics 11 and 12 constituting 0, and this portion is stretchable. To be configured. It is preferable that the plurality of elastic threads 43 be widely attached between the waist gather and the end of the absorber 2.
It becomes freely expandable and contractible in the left and right and lateral directions over a wide area of the abdomen, and has excellent adhesion to the wearer. Elastic thread 4
The structure in which the elastic member 43 is attached without overlapping the locking portion 52 and the absorber 2 does not hinder the elasticity of the elastic yarn 43 due to the rigidity of the absorber 2, Another effect is that deformation can be prevented.

On the back side B, similarly to the abdomen side F, a plurality of elastic yarns 44 are provided between the two nonwoven fabrics 11 and 12 so as to extend substantially parallel to the waist elastic yarns 41. I have.
Since there is no locking portion on the back, the elastic thread 44 can be provided along the entire surface from the left edge to the right edge of the back. It is preferable that the elastic yarn 44 is configured so as not to overlap the absorber 2 like the elastic yarn 43. The presence of the elastic thread 44 on the back side can further enhance the adhesion to the wearer.

FIG. 3 is a partially exploded development view showing another embodiment of the present invention. The disposable diaper D includes a substantially hourglass-shaped liquid-impermeable back sheet 1 and a liquid-permeable top sheet 3.
In this case, the absorber 2 is loaded between the two, and these are adhered to each other with an adhesive applied in the form of dots or lines. Between the back sheet 1 and the top sheet 3, an elastic yarn 41 for the waist and an elastic yarn 4 for the leg in the stretched state are provided.
2 are intermittently bonded to form waist gathers and leg gathers, respectively. In addition, rising gathers 16 are provided on the upper surface side of the top sheet 3 on the left and right sides, respectively, to form pockets opened at the center side.

At the left and right edges of the back side B, an integrated fastening tape 55 having a hook member of a mechanical hook-and-loop fastener provided at the end is provided. The fastening portions 52, 52 detachably attached to the fastening tape,
Is disposed on the outer surface of the abdomen side F. And these locking parts 5
A plurality of elastic yarns 43 are provided between the backsheet 1 and 2 52.
And the top sheet 3 is intermittently bonded in an extended state so as to be sandwiched by the top sheet 3. The elastic thread 43 is not attached on the absorber 2 and is configured not to overlap the absorber 2. If the back sheet 1 is made of a long-fiber nonwoven fabric having a basis weight of 18 to 70 g / m ² , there is no need to provide a separate locking portion, and a disposable diaper can be manufactured at low cost.

In the illustrated example, the back side B has a simple structure without the elastic thread (44). Therefore, the arrangement position of the absorber in the conventional disposable diaper is changed (the absorber is shortened in the longitudinal direction to eliminate the absorber on the abdomen side), and a plurality of elastic members are provided at the abdomen position where the absorber does not exist. It is sufficient to change the design only by adding and attaching the yarn 43.

Although the disposable diaper of the present invention can of course be used for children, it is recommended that the disposable diaper be formed in an adult size and applied. In the case of an adult, it is economical because a small amount of urine and the like can be dealt with by replacing these auxiliary sheets with an inexpensive auxiliary sheet or auxiliary pad. Since the disposable diaper of the present invention has excellent adhesiveness, even when an auxiliary sheet / pad is used in combination, it does not swell abnormally and the fastening tape is detachable, so that it is convenient for replacement of the auxiliary pad and the like. It is.

[0024]

As described above, the present invention is constructed as described above, so that the adhesion of the diaper is far superior to that of a conventional disposable diaper with a fastening tape. Therefore, even when auxiliary pads and the like are used together inside the disposable diaper, the diaper does not bulge outwards, and even if other clothes are worn on the diaper, the appearance of the diaper may be uncomfortable. There is no. Since the fastening tape is detachable, it is convenient when replacing the auxiliary pad. According to the present invention, a disposable diaper that is extremely easy to use and has a high fit can be provided not only for children but also for adults.

[Brief description of the drawings]

FIG. 1 is an explanatory perspective view showing a typical embodiment of a disposable diaper according to the present invention.

FIG. 2 is a partially exploded development view of FIG.

FIG. 3 is a partially exploded explanatory view showing another embodiment of the present invention.

FIG. 4 is an explanatory plan view of a conventional disposable diaper.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 back sheet 2 absorber 3 top sheet 5 fastening tape 10 outermost sheet 21 liquid-impermeable sheet 22 liquid-permeable sheet 41 to 43 elastic thread 52 locking portion B back F abdomen E ear

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-63077 (JP, A) JP-A-4-354948 (JP, A) JP-A-4-35663 (JP, A) JP-A-2- 5947 (JP, A) Japanese Utility Model Application Hei 5-91639 (JP, U) Japanese Utility Model Application Hei 6-55623 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61F 13/49 A61F 5 / 44 A61F 13/58

Claims (3)

(57) [Claims] 1. A disposable diaper which is formed into a pants-type at the time of use with a fastening tape, wherein a plurality of waist elastic yarns are attached to longitudinal ends of the abdomen side and the back side of the diaper so that a waist gather is formed. A mechanical hook-and-loop fastener is provided on both side edges of the diaper on the back side in the width direction.
At least a pair of fastening tapes to which the hook members are attached are provided, and a loop member of a mechanical hook- and- loop fastener capable of detachably engaging the fastening tape is provided on the outermost layer on the abdomen side. A stop portion is provided separately on the left and right sides of the diaper. Further, a plurality of elastic yarns different from the waist elastic yarns extend along the diaper width direction between the left and right locking portions. A disposable diaper characterized by being attached wide and without overlapping the absorber . 2. A fastener tape for use when used.
In a disposable diaper formed in the shape of a diaper, a plurality of diapers are provided at longitudinal ends on the abdominal side and the back side of the diaper.
Elastic yarn for the waist is attached and the waist gathers
A mechanical hook-and-loop fastener is formed on both sides of the back side of the diaper in the width direction.
At least one pair of fasteners to which the hook members are attached
A fastening tape is provided, and the fastening tape is attached and detached on the outermost layer on the abdomen side.
It is made of a nonwoven fabric with a basis weight of 18 to 70 g / m ²
Locking parts are provided separately on the left and right of the diaper.
Ri, yet another plurality of resilient and elastic threads for the waist
The yarn has a width along the diaper width direction between the left and right locking portions.
Widely attached without overlapping the absorber
Disposable diapers characterized by the following . 3. The diaper back side, wherein a plurality of elastic yarns different from the waist elastic yarns are provided wide along the diaper width direction without overlapping with the absorber. 2. The disposable diaper described in 2.