JP2942246B2 - 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 for infants, training pants, adults or incontinent persons.

[0002]

2. Description of the Related Art In most conventional disposable diapers, a so-called flat type disposable diaper in which a flat main body is applied to a wearer and stopped by a tape fastener on the wearer is used. In such a flat type diaper, at the time of disposal after use, after the diaper is rolled so as to wrap the excrement therein, the diaper is stopped with a tape fastener and discarded.

On the other hand, in recent years, a so-called pants-type diaper has been developed in which side portions are fixed in advance without using a tape fastener. Various techniques have been proposed as such a pants-type diaper, for example, those having gathers at a waist and a leg (JP-A-58-115106, JP-A-58-1151).
07, JP-A-62-231005, etc.). And these pants-type diapers are all worn in a standing position like ordinary underwear, and intended to be used for toilet training of not only infants but also for older children, or for incontinent persons and adults. Things.

[0004] However, these pants-type diapers cannot be stopped in a rolled state because of the absence of a tape fastener even if the diapers are rolled during disposal after use. Excretions such as loose stool and diarrhea stool, which are highly susceptible, may be exposed, and there is also a problem in terms of sanitation during disposal.

In Japanese Patent Application Laid-Open Nos. Sho 62-69804 and Hei 3-176051, etc., tape fasteners are provided on both sides of the waist portion of the diaper, and the tape fasteners are used for waist adjustment and fastening at the time of disposal. Although a technique has been proposed, such a tape fastener is located at a position where it can be easily removed by an infant or a wearing caregiver during wearing, and thus there is a disadvantage that the diaper slips off accidentally. Further, there is a problem that the diaper provided with such a tape fastener loses the appearance of pants in appearance.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a pants-type disposable diaper which can be easily disposed of, can sufficiently satisfy hygiene during disposal, and does not deteriorate its appearance during wearing. It is in.

[0007]

SUMMARY OF THE INVENTION The present invention comprises a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber interposed between these sheets. In the pants-type disposable diaper bonded to each other, the back sheet is made of a composite material of a film and a nonwoven fabric, and a tape fastener for fastening at the time of disposal is provided in a central area in the width direction of the surface of the back sheet. The tape fastener is
Equipped with a male locking member that can be engaged with the nonwoven fabric constituting the sheet
The above object has been achieved by providing a disposable diaper characterized by the fact that it is a disposable diaper.

[0008]

After use, the disposable diaper of the present invention is rolled up so that the diaper is wound in the longitudinal direction, fixed by a tape fastener, and discarded. Accordingly, the disposable diaper can be easily disposed of and the excrement can be confined in the rolled diaper and covered with the back sheet, so that the disposable diaper can be treated hygienically.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the disposable diaper of the present invention will be described in more detail with reference to the accompanying drawings. 1 (A) is a perspective view showing the front side (ventral side) of the diaper in one embodiment of the disposable diaper of the present invention, and FIG. 1 (B) is a perspective view showing the back side (back side) thereof. FIG. 2 is a development view of the disposable diaper shown in FIG. FIG. 3A is an enlarged perspective view of the tape fastener in the disposable diaper shown in FIG. 1, and FIG. 3B is an enlarged perspective view showing a mode of peeling the tape fastener.

The disposable diaper 1 of the present embodiment is shown in FIG.
As shown in (A) and (B), it has a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and an absorber 4 interposed between these sheets, and the front and rear waist portions. 5
A and 5B are pants-type disposable diapers in which the left and right sides are respectively joined. A tape fastener 10 for fastening at the time of disposal is provided in a central area in the width direction of the diaper on the surface of the back sheet 3.

More specifically, in the disposable diaper 1 of this embodiment, as shown in FIGS. 1 and 2, the absorber 4 is formed in an hourglass shape in which the crotch region is narrowed, and the topsheet 2 and the back surface are formed. The crotch region of the sheet 3 is also curved as described above according to the shape of the absorber 4, and the absorber 4 is sandwiched and fixed between the top sheet 2 and the back sheet 3. Further, the waist portions 5A, 5B and the leg portion 6 at the front and rear in the peripheral portion of the absorber 4 are used to fit the wearer with the waist portions 5A, 5B and the leg portion 6 when the diaper is worn. An elastic elastic member 7 is provided fixed by the top sheet 2 and the back sheet 3. As shown in FIGS. 1A and 1B, the front waist portion 5A and the rear waist portion 5B are joined to each other on the right and left sides to form a joint portion 8, thereby forming a pants-like shape. The shape is.

The joint 8 is preferably adapted to be easily torn in the vertical direction, so that the disposable diaper can be easily torn at the joint without soiling the wearer's skin. The disposable diaper can be easily taken off and discarded. The joint 8
Is formed by bonding the front waist portion 5A and the rear waist portion 5B on the left and right sides of each other by using, for example, a hot-melt adhesive or a material that can be bonded by ultrasonic waves. It is preferable that the feel is flexible even after joining.

The topsheet 2 is preferably a liquid-permeable sheet that allows excrement to permeate into the absorber and has a feel similar to underwear. Examples of such a liquid-permeable sheet include a woven cloth and a nonwoven cloth. And a porous film. In addition, a method of applying a hydrophobic compound such as a silicon-based oil agent or paraffin wax to the periphery of the topsheet 2 or a method of applying a hydrophilic compound such as an alkyl phosphate ester on the entire surface in advance and washing the periphery with warm water is used. By applying a water repellent treatment, it is possible to prevent leakage due to bleeding of urine and the like on the periphery.

The absorbent 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 fiber, and a high-molecular-weight water-absorbing polymer. preferable. The high-molecular-weight water-absorbing polymer may be present in any of the upper layer, the middle layer, and the lower layer of the absorber 4, or may be mixed with pulp. Further, the high-molecular water-absorbing polymer has a holding performance capable 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,
Examples of such a high-molecular-weight water-absorbing polymer include starch-acrylic acid (salt) graft copolymer and starch-
Preferred examples include a saponified acrylonitrile copolymer, a crosslinked product of sodium carboxymethyl cellulose, and an acrylic acid (salt) polymer.

The elastic elastic member 7 is preferably made of thread rubber, flat rubber, film type rubber or film-like foamed polyurethane, and preferably has a 70% to 100 g stress at 150% elongation. The elastic elastic member is preferably of a nonwoven fabric type having elasticity and air permeability.

Thus, the disposable diaper 1 of the present embodiment is
As shown in FIG. 1 (B), the back sheet 3 is made of a composite material of a film and a non-woven fabric, and is disposed along the longitudinal direction of the diaper in a central area of the surface of the back sheet 3 in the width direction of the diaper. A tape fastener 10 is provided for wearing at a time. Here, the "width direction" refers to the direction shown in FIG.
(B), as shown in FIG. 2 and the like, means the left-right direction when worn, and the “longitudinal direction” means the up-down direction when worn.

Further, the film constituting the back sheet 3 is stretched by adding a filler to a thermoplastic resin.
A moisture-permeable liquid-impermeable sheet that allows vapor to permeate is preferably used. The nonwoven fabric can be used without any particular limitation as long as it is generally used for disposable diapers and the like. The back sheet made of such a laminated material has a feeling similar to underwear, and is used such that the outer surface is formed of a nonwoven fabric when used.

The above-mentioned tape fastener 1 in the present embodiment
Reference example 0 will be described in detail. The tape fastener 10 of the reference example includes, as shown in FIG. 3A, a fixing portion 11 that is joined and fixed to the back sheet 3 and a diaper that is rolled and stopped when the diaper is discarded. It consists of a fastening part 12 for wearing,
The fixing part 11 and the fixing part 12 are respectively mounted on the mounts 13 and 1.
3 'and adhesive layers 14 and 14' formed by applying an adhesive to one surface of the mounts 13 and 13 '. The surface of the mount 13 in contact with the adhesive layer 14' is subjected to a release treatment. Have been.

The fixing portion 11 has one end thereof mounted on the backing sheet 1.
The adhesive portion 12 is bent at one end toward the adhesive layer 14 '. Then, the adhesive layer 14 in the bent portion of the fixing portion 11 and the adhesive layer 14 ′ of the fixing portion 12 are in contact with each other, and the fixing portion 11 and the fixing portion 12 are fixed. The adhesive layer 14 ′ of the fixing portion 12 and the surface of the mount 13 on which the release processing has been performed on the mount 13 are in contact with each other in an adhesive and peelable manner. In addition, the fastening portion 12
Is in contact with the mounting sheet 13 at the other end of the fastening portion 12 to form a knob 15, and as shown in FIG. 3B, the knob 15 is pulled up in the direction of the arrow. Thereby, the fastening part 12 can be peeled off from the fixing part 11.

As a material for forming the mounts 13 and 13 ', a film, paper, nonwoven fabric, or a composite material thereof can be preferably used. In addition, the fastening portion 12
The backing sheet 13 ′ is particularly preferably formed of the same material as the back sheet 3, whereby the outer surface of the tape fastener 10 is similar to the outer surface of the diaper, so that the tape fastener is inconspicuous in appearance. It will be an excellent diaper. In this case, the mount 13 of the fixing portion 11
The mount 13 ′ of the fastening portion 12 can be formed of different materials.

An adhesive for forming the adhesive layers 14, 14 '
As an ordinary disposable diaper tape fastener
The same materials used, for example, styrene-ethylene
-Butylene-styrene block copolymer (SEB
S), styrene-isoprene-styrene block copolymer
(SIS), styrene-butadiene-styrene copolymer
Styrene block polymer such as body (SBS), or
Is based on natural rubber, butadiene, acrylate, etc.
Pressure-sensitive adhesives, etc.
Those having a rimer as a main component are particularly preferred. In addition,
The release treatment is performed according to a conventional method.

In order to join and fix the tape fastener 10 to the disposable diaper 1, the adhesive layer 14 of the fixing portion 11 of the tape fastener 10 is attached to the back sheet 3.
1B in the direction shown in FIG.

Another example of the tape fastener according to the present invention is, for example, a tape fastener having a structure shown in FIGS. Here, FIGS. 4 to 6 are enlarged perspective views showing other examples of the tape fastener in the disposable diaper of the present invention. The tape fastener shown in FIGS. 4 to 6 is formed in the same manner as the tape fastener 10 except for the points that are particularly described.

In the tape fastener 10A shown in FIG. 4, a knob 15A is formed by providing a portion to which no adhesive is applied on the fastening portion 12A. The tape fastener 10B shown in FIG. 5 has a knob 15B formed by attaching another member to one end of the fastening portion 12B. The tape fastener 10C shown in FIG. 6 has a fixing portion 11C and a fastening portion 12C formed by bending an integrated mount 13C, and a portion where no adhesive is applied is provided at an end of the fastening portion 12C. A knob 15C is formed.

[0025] Then, the tape fastener used in the present invention, in place of the adhesive layer of the tape fastener of Reference Example composed of male and female two support body provided with a by which the locking member adapted to be hooked to each other A male locking member such as Velcro tape (registered trademark) is provided . In this case, another female support is provided at a position where the tape fastener comes into contact when the diaper is rolled, and the female support and the tape fastener support (male locking member) are provided. ) May be locked, but when the outer surface of the diaper is the above-mentioned non-woven fabric, a tape fastener is formed only by the male locking member so that the female support is not provided. You can also. That is, in the present invention, the tape fastener is provided with a male locking member capable of engaging with the nonwoven fabric forming the back sheet .
The locked state becomes particularly good, the rounded form at the time of disposal can be maintained favorably, and the disposal can be carried out particularly hygienically.

Another example of the disposable diaper of the present invention is the diaper shown in FIG. Here, FIG. 7A is a perspective view showing the front side of another embodiment of the disposable diaper of the present invention, and FIG. 7B is a perspective view showing the back side thereof. In the disposable diaper 20 shown in FIGS. 7A and 7B, the tape fastener 30 has a diaper 2.
It is provided in the crotch part of 0 (inseam area). Thus, by providing the tape fastener 30 in the crotch region of the diaper 20, the tape fastener is hidden due to the constriction of the crotch, so that the appearance can be further improved,
The appearance can be equivalent to that of a conventional disposable diaper having no tape fastener. Further, in the disposable diaper of the present invention, as shown by a dotted line in FIG. 7B, a tape fastener 30 'can be provided at or near the waist portion of the diaper, thereby minimizing the length of the tape fastener. can do.

Since the disposable diaper 1 of this embodiment is configured as described above, the disposable diaper 1 is excellent in disposability after use as described in detail below with reference to FIGS. 8 (A) and 8 (B). is there. Here, FIG. 8A is a schematic perspective view showing an aspect in which the diaper is rolled when the diaper is discarded, and FIG. 8B shows an aspect in which the rolled diaper is fixed with a tape fastener. It is a schematic perspective view. The disposable diaper 1 is used in the same manner as this type of pants-type disposable diaper. Then, after use, FIG.
As shown in FIG. 8, after the diaper is rolled in the longitudinal direction and the fastening portion 12 of the tape fastener 10 is peeled off from the fixing portion 11, the adhesive of the fastening portion 12 is removed as shown in FIG. The diaper can be easily and sanitarily disposed of by fixing the rolled state of the diaper by fixing the layer 14 'to the front and rear waist portions 5A and 5B.
8 (A) and 8 (B) show the disposal method of rolling the diaper from the crotch, but the disposable diaper of the present invention can be disposed by other various methods. Arbitrary disposal operations can be performed, such as rolling from the waist of the diaper and fastening the crotch of the diaper with a tape fastener.

[0028]

Industrial Applicability The disposable diaper of the present invention can be easily disposed of, can sufficiently satisfy hygiene during disposal, and does not impair the appearance during wearing. Therefore, the disposable diaper of the present invention can be wrapped and discarded as it is by directly rounding it after use, closing the inside, and fastening it with a tape fastener.

[Brief description of the drawings]

FIG. 1 (A) is a perspective view showing a front side (ventral side) of a diaper in one embodiment of the disposable diaper of the present invention, and FIG. 1 (B) shows a back side (back side) thereof. It is a perspective view.

FIG. 2 is a development view of the disposable diaper shown in FIG.

3 (A) is an enlarged perspective view of a tape fastener in the disposable diaper shown in FIG. 1, and FIG. 3 (B)
FIG. 3 is an enlarged perspective view showing a mode of peeling.

FIG. 4 is an enlarged perspective view showing another example of the tape fastener in the disposable diaper of the present invention.

FIG. 5 is an enlarged perspective view showing another example of the tape fastener in the disposable diaper of the present invention.

FIG. 6 is an enlarged perspective view showing another example of the tape fastener in the disposable diaper of the present invention.

FIG. 7 (A) is a perspective view showing the front side of a diaper in another embodiment of the disposable diaper of the present invention, and FIG.
(B) is a perspective view showing the back side.

FIG. 8A is a schematic perspective view showing a mode in which the diaper is rolled when the diaper is discarded, and FIG.
(B) is a schematic perspective view which shows the aspect which fixes a rolled-up diaper with a tape fastener.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Top sheet 3 Back sheet 4 Absorber 5A Waist part before 5A Waist part after 6B Leg part 7 Elastic elastic member 8 Joining part 10 Tape fastener 11 Fixing part 12 Fastening part 13 Backing paper 14 Adhesive part 15 Knob

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-2-4372 (JP, A) JP-A-4-7819 (JP, U) JP-A-58-22908 (JP, U) JP-A-1 168510 (JP, U) JP 5-21935 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) A61F 13/15-13/64 A61F 5/44

Claims (1)

(57) [Claims] 1. A pants-type disposable having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber interposed between the two sheets, and the front and rear waist portions are joined to the right and left, respectively. In the diaper, the back sheet is made of a composite material of a film and a nonwoven fabric, and a tape fastener for fastening at the time of disposal is provided in a central area in the width direction of the diaper on the surface of the back sheet .
Ri, the tape fastener, constituting the back sheet not
Disposable diaper according to claim and this is intended to comprise a fabric engageable with the male engaging member.