JP2000102562A - Absorptive article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To repeatedly use a disposable diaper and to absorb and hold a large quantity of urine by forming a means for separating a back sheet on the back sheet in an article having an absorbent arranged between a liquid permeable top sheet and a liquid impermeable back sheet. SOLUTION: A urine pad 1 is formed of a liquid permeable top sheet 3, a liquid impermeable back sheet 4, and an absorbent arranged between the both, and a means for separating the back sheet 4 is formed on the back sheet 4. A part of the back sheet 4 is separated by the separating means to form an opening part 9. When this pad 1 is used as a replacing absorbent, the urine pad 1 in which the back sheet 4 is not separated is mounted on a disposable diaper. When the urine pad 1 is used as an auxiliary absorbent, the urine pad 1 in which the back sheet 4 is partially separated to form the opening part 9 is mounted on the disposable diaper.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an absorbent article, and more particularly to an absorbent article used in combination with a disposable diaper, a diaper cover, incontinence pants, underwear and the like.

[0002]

[Prior art and problems] Generally, paper diapers, diaper covers,
Spent urine pad that can be attached and detached to incontinence pants, underwear, etc.
Absorbent articles such as sanitary napkins include a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body comprising cotton-like pulp, a high-absorbent polymer, a hydrophilic sheet, etc. between these two sheets. , And urine, blood, etc. are absorbed by the absorber through the top sheet. Among the above products, especially incontinence products are widely used as necessities not only for infants but also for the sick and incontinent elderly people.In recent years, the degree of aging society has been increasing, and There is a demand for a product that is easy to use, inexpensive, and burden-free for caregivers as well as caregivers. One such product is a urine pad used in combination with a diaper.

Generally, when a diaper and a urine pad are used in combination, the urine pad serves as a “replacement absorber” and a “supplementary absorber” for the diaper. Two roles are required. When used as a replacement absorber, when diapers can be changed frequently, such as during the day,
Frequent replacement of only the urine pad does not wet the urine until the diaper is used, so that the diaper can be used several times. in this case,
It is economical because only inexpensive and small urine pads need to be replaced, and the amount of garbage discharged is small.

[0004] In addition, in the use as an auxiliary absorber,
When the amount of urine at bedtime is large and the diaper cannot be changed for a long time, the diaper can absorb urine together with the diaper and can significantly increase the absorption performance. In addition to protecting the comfort and sleep of the caregiver, the caregiver's labor can be significantly reduced.

However, the conventional urine pad has the following problems. In other words, when the urine volume is large and you cannot change the diaper for a long time, use it together with a diaper, and use the urine pad to use it as an auxiliary absorbent for the diaper. ,
This is only for urine overflowing from the side edge of the urine pad due to exceeding the absorption limit of the urine pad or improper mounting.
Therefore, in order to actively use the absorbent diaper, it is necessary that the urine overflows from the side edge of the urine pad at a certain amount or more. On the other hand, if the urine pad can be replaced frequently in the daytime or the like and the urine pad is used as a replacement absorbent body, three-dimensional gathers may be provided on the urine pad or side edges may be used to repeatedly use the diaper. In order to prevent the urine from spilling out from the side edge of the urine pad, it is necessary to provide a liquid-impervious sheet in the part, and to contradict the performance required when using as an auxiliary absorber described above. Is required.

Further, since the liquid-permeable topsheet of the disposable diaper has a urine pad disposed on the surface thereof, the area in contact with urine is reduced, and the absorbent material of the disposable diaper cannot be used effectively. However, a significant improvement in absorption capacity cannot be expected by using a urine pad as an auxiliary absorbent and using it together with a diaper.

When a urine pad is used as an auxiliary absorbent, the urine pad is generally disposed at a substantially central portion on a top sheet of a diaper to be used. The distance between the longitudinal side edges of the diaper is very short, and the area for absorbing urine overflowing from the urine pad longitudinal side edges on the diaper is very small. Therefore, if urine overflows from the longitudinal side edge of the urine pad due to misalignment of the urine pad during or during wearing, or due to the twist of three-dimensional gathers arranged on the urine pad, the diaper should be used. There is a problem that it is easy to leak from the longitudinal side edge. In this case, not only is the diaper wearer uncomfortable, but also a caregiver takes time and trouble to clean up, which is a very large burden.

However, when the urine pad is designed so that the urine volume is large and does not overflow even when worn for a long time, it is necessary to improve the absorption capacity of the urine pad itself, so that many pulp and polymer absorbents (SAP) are required. ) Is required, and the absorber is large and thick and bulky, so that it is inconvenient to carry, and further, there is a problem that a feeling of wearing and a fitting property are deteriorated.

Various solutions have been proposed to solve these problems. For example, a proposal has been made to make the back sheet of the urine pad liquid permeable in order to utilize the absorbent material of the diaper positively (JP-A-63-30960).
U.S. Pat. No. 2) and a urine pad so that urine does not penetrate into the diaper as much as possible so that the diaper can be used repeatedly by replacing the urine pad while using the absorbent body of the diaper. Of Japanese Patent Application Laid-Open (JP-A) No. 63-30960
No. 3 publication). Also, when the urine pad can be replaced frequently, spread and use the liquid-impermeable side flaps provided on the urine pad so that urine does not easily leak from the urine pad,
When replacement is not possible for a long time, the liquid-impermeable side flaps are folded down to make the width narrower, and urine is more easily moved from the longitudinal side edge of the urine pad to the diaper side to absorb the diaper. A proposal has also been made to utilize functions (Japanese Patent Laid-Open No. 10-28701).

[0010]

However, when all or a part of the back sheet of the urine pad is liquid-permeable, even if the urine pad alone is frequently replaced and used, urine cannot be used. There is a problem that the diaper has penetrated into the diaper and is not suitable for repeated use of the diaper.

When a liquid-impermeable side flap is used, the urine easily overflows from the side edge of the urine pad, and the absorbent for the diaper to be used can be used slightly. Also in the case where urine does not overflow from the side edge of the urine pad necessary when used as a replacement absorber, and when it exceeds a certain amount required when used as an auxiliary absorber for diapers It cannot be said that the compatibility with the performance of urine leaking out from the side edge of the urine pad is sufficiently achieved.

An object of the present invention is to solve the above-mentioned problems of the conventional urine pad, and to use the urine pad as a replacement absorbent in the daytime when only the urine pad is frequently replaced.
Without leaking urine from the urine pad, it is possible to use the diaper repeatedly, and when used as an auxiliary absorber of the diaper used at night when the amount of urine is large and the wearing time is long, An object of the present invention is to provide an absorbent article capable of absorbing and retaining a large amount of urine together with a diaper.

[0013]

SUMMARY OF THE INVENTION The present invention relates to an absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between these two sheets. An absorbent article characterized in that a means for separating the backsheet is formed in at least a part of the sheet.

Further, the present invention resides in an absorbent article characterized in that a detachable attaching means is arranged on a part of the back sheet.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION In the absorbent article of the present invention, means for separating the backsheet is formed in at least a part of the liquid-impermeable backsheet. Absorbent articles of the present invention having such a configuration, especially when used as a urine pad to be used in combination with a diaper to be used and disposed on a diaper top sheet, use the urine pad for replacement. When used as a body and repeatedly using a diaper after replacing only the urine pad, the diaper can be reliably reused by preventing urine leakage from the urine pad, and When using a urine pad as an auxiliary absorber and using a diaper for a long time to absorb urine in both the urine pad and the diaper, separate a part of the back sheet and form an opening in the back sheet By doing so, it is possible to absorb and hold a large amount of urine together with the diaper. In this case, it is preferable to dispose a detachable attaching means on a part of the back sheet. By providing the attaching means, the absorbent article can be fixed on the diaper using the absorbent article, and it is possible to prevent the absorbent article from shifting during the wearing or the wearing and preventing the urine from leaking from the absorbent article.

As the liquid-permeable topsheet, absorber and liquid-impermeable backsheet constituting the absorbent article of the present invention, known ones can be used without any particular limitation. The material to be used will be specifically described.

The top sheet used in the present invention is a liquid-permeable nonwoven fabric or woven fabric having a basis weight of 10 to 40 g / m ² and composed of hydrophilic fibers having a fiber diameter of 4 denier or less. Are used. More specifically, polypropylene, polyethylene, polyester, or a composite fiber composed of two or more components such as polyester, polypropylene, and polyethylene may be used. In particular, low-melting polyester / polyester, polyester / polyethylene, and polypropylene / polyethylene composite fibers Is preferred from the viewpoint of strength, but is not particularly limited.

Absorbent The absorbent used in the present invention is a mixture of flocculent pulp and a superabsorbent polymer which is a superabsorbent material, and is wrapped with a hydrophilic sheet. Alternatively, 3 to 60% by weight of a heat-fusible substance may be mixed with the cotton-like pulp and thermocompression-bonded. Although the configuration of the absorber is not particularly limited, for example, it may be a single layer containing cotton-like pulp as a main component, or may be a layered material obtained by uniformly mixing a highly water-absorbent material with cotton-like pulp, or A configuration in which a uniform layer made of a highly water-absorbing material is sandwiched between two layers mainly composed of flocculent pulp may be used.
The shape of the absorber has a projection plane such as an hourglass type, a rectangular type, a T-shaped type, an elliptical type, an elliptical type, a gourd type, a rice scoop type, and the dimensions are a urine pad, a sanitary type. Although it depends on the type of napkin and its use,
Generally, length 100-500mm, width 40-180m
m. The flocculent pulp is a chemical pulp sheet or a mechanical pulp sheet having a fiber length of 5 mm or less obtained by defibrating with a crusher. The pulp raw material is not limited to softwoods, but hardwoods, straws, bamboos and kefna are also applicable. The amount of the pulp used depends on the intended absorber, for example, depending on whether the pulp is used alone, used in a plurality of layers, or used in combination with other absorbents. It is in m ^2.

The superabsorbent polymers include starch-based polymers,
Cellulose type and synthetic polymer type are mentioned. That is, a saponified starch-acrylic acid (salt) graft copolymer, a saponified starch-ethyl acrylate graft copolymer, a saponified starch-methyl methacrylate graft copolymer, and a saponified starch-acrylonitrile graft copolymer Product, saponified product of starch-acrylamide graft copolymer, saponified product of starch-acrylonitrile 2-acrylamide-2-methylpropanesulfonic acid graft copolymer, acrylic acid (salt) polymer, poly (acrylic acid) A crosslinked product of ethylene oxide, sodium carboxymethyl cellulose, a crosslinked product of a polyvinyl alcohol-maleic anhydride reactant and the like can be used. Among them, those which absorb urine, body fluid and water more than 20 times their own weight, polyacrylic Sodium acid-based ones from the point of absorption performance It is also suitable. The distribution amount of the superabsorbent polymer is 10 to 500% of the total weight of the floc pulp in a dry state.
%, Preferably 15-300%, such amount of superabsorbent polymer being substantially uniformly distributed in the floc. When the superabsorbent polymer absorbs and swells, the particles have minimal interference with each other, are less likely to form a permeation barrier by continuous contact, and penetrate and absorb urine and bodily fluids in three dimensions. .

As the heat-fusible substance, a fibrous material is preferable in consideration of mixing with the cotton-like pulp. Examples of the heat-fusible substance include polypropylene, polyethylene, polyester, polyvinylidene, acrylic resin, and nylon resin. Alternatively, a composite fiber composed of two or more components such as polyester, polypropylene, and polyethylene may be used. Particularly, a composite fiber of polyester / polyester, polyester / polyethylene, and polypropylene / polyethylene is preferable from the viewpoint of strength. A fiber diameter of about 1 to 5 denier is preferable, and a fiber length of 3 to 30 mm is suitable for mixing with the cotton-like pulp, but is not particularly limited. By thermocompression-bonding these mat layers at a certain pressure or higher, a skeletal structure made of a heat-fusible substance is formed, and the mat layers themselves can have strength even when wet. The method of thermocompression bonding is not particularly limited, such as a hot press roll, a hot air dryer, a microwave heater, an infrared heater, etc., but heat is uniformly transmitted to the mat layer, and the heat-fusible substance melts to form a skeletal structure. What is necessary is just to be able to form.

The hydrophilic sheet may be any hydrophilic sheet such as tissue, absorbent paper, hydrophilic non-woven fabric, and the like. As a method of compressing the absorber, the surface of the absorber may be a continuous surface shape such as a roll having a smooth peripheral surface so that the density of the absorber is substantially uniform over the entire surface, or the peripheral surface may be uneven. The density of the absorber may be partially different depending on the roll or the like, and the embossment may have a pattern arrangement for guiding urine or bodily fluid in the vertical direction and the oblique direction. In the case of embossing, the compression section and the non-compression section may be continuous or discontinuous.

Backsheet The backsheet used in the present invention comprises a thin, liquid-impermeable plastic film web or sheet. The plastic can be formed from materials such as, for example, polyethylene, polypropylene, polyvinyl chloride, or similar materials, or a web or sheet of a film based on polyvinyl alcohol. The backsheet material can be transparent or opaque and can have an embossed surface. It can also be made from a nonwoven fibrous web made to be substantially liquid impermeable.

In the back sheet of the present invention, means for separating the back sheet is formed in at least a part, and an opening is formed by separating the part. As a means for separating the back sheet, a method of forming a perforated cut line in the back sheet, attaching a tearing thread or tape, forming a cut line at the end of the back sheet, and the like are possible. There is no particular limitation. Further, the opening may be formed in the back sheet in advance, the opening may be covered with a liquid impermeable sheet, and the back sheet may be adhered to the back sheet surface with a peelable adhesive. In addition, the shape of the opening is not particularly limited, and may be formed in a shape such as a rectangle, a circle, an ellipse, and a triangle. Further, a plurality of slit-shaped openings may be formed. In addition, the back sheet of the present invention has a detachable mounting means disposed at a part thereof. As the detachable attaching means, an adhesive layer that can be detachably adhered to the top sheet surface of the used diaper, or a hook material of a hook-and-loop fastener that can be locked to the top sheet surface of the used diaper, etc. These can be arranged on the back sheet.

The absorbent article of the present invention can be advantageously used as a urine pad used together with a diaper.
In addition, the absorbent article can be used alone or in combination with other members as an incontinence pad, a feathered type or featherless type sanitary napkin, or the like.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the absorbent article of the present invention will be described in detail with reference to the drawings, taking a urine pad used together with a disposable diaper as an example, but the present invention is not limited thereto.

FIG. 1 is a cross-sectional view of the urine pad of the present invention, showing a state before a back sheet is separated.
In FIG. 1, the urine pad 1 includes a liquid-permeable top sheet 3, a liquid-impermeable back sheet 4, and an absorber 5 disposed between these two sheets. Means (not shown) for separating the sheets is provided. Further, the urine pad 1 may be provided with a stretchable elastic body along both side edges in order to increase leakage prevention.
Further, a three-dimensional gather may be formed.

FIG. 2 is a sectional view showing a state in which a part of the back sheet 4 of the urine pad 1 shown in FIG. FIG. 3 is a sectional view showing an example different from FIG. 1 before the back sheet of the urine pad of the present invention is separated. In FIG. 3, the urine pad 1
An opening 9 is formed in advance on the back sheet 4, and a liquid-impermeable sheet 20 is arranged so as to cover the opening 9, and the back sheet 4 can be peeled off via a joining means 21.
It is joined to In this case, as the bonding means 21, a method such as an adhesive, an adhesive seal, and a pressure bonding method is used, but any method that does not allow urine to pass can be used.

FIGS. 4, 5, 6 and 7 are plan views of the urine pad 1 of the present invention shown in FIG. 1 as viewed from the back sheet 4 side, and the separating means is formed on the back sheet 4. The state is shown. In FIG. 4, the separating means is formed by a perforation 17 which does not allow urine to pass through the center of the back sheet 4 in the longitudinal direction. In this case, embossing may be performed instead of the perforations 17. In FIG. 5, the tearing thread 18 is arranged on the back sheet 4 to form a separating means. In this case, a tear tape may be used instead of the tear thread 18. In FIG. 6, a separating means is formed by making a cut 19 in one side edge at the center in the width direction of the back sheet 4. In FIG. 7, a plurality of tearing threads 18 are arranged in the longitudinal direction of the back sheet 4, and a plurality of separating means are formed. Thereby, a plurality of slit-shaped openings are formed in the back sheet 4.

The separating means is not limited to the methods shown in FIGS. 4 to 7, but can separate and remove the back sheet 4 easily. Any method can be used as long as it can maintain the impermeability. 4 to 7, in one longitudinal end region of the back sheet 4, a mounting means 16 that can be attached to and detached from a used diaper is arranged. The attachment means 16 may be provided at both end regions of the backsheet 4 and may be provided at both side edge regions.

FIGS. 8 and 9 are cross-sectional views showing a case where the urine pad 1 of the present invention is used together with the diaper 2 using the urine pad 1. FIG.
FIG. 8 shows a case in which the urine pad 1 is used as a replacement absorbent, and shows a state in which the back sheet 4 shown in FIG. 1 is attached to the diaper 2 using the unseparated urine pad 1. FIG. 9 shows a case in which the urine pad 1 is used as an auxiliary absorber, and the urine pad 1 shown in FIG. 1 shows a state of being attached to the device.

[0031]

As described above, the absorbent article of the present invention is particularly suitable for use as a urine pad used in combination with a disposable diaper or as a liquid-impermeable backing when used as a replacement absorbent. When used as a supplementary absorbent diaper for use with the seats deployed, by separating and removing at least a part of the back sheet, the absorbent sheet is used in the daytime or the like where frequent replacement is possible. It is possible to use the diaper repeatedly without leaking urine from the sexual article, and to absorb and retain a large amount of urine together with the diaper during use at night when the diaper is worn with a large amount of urine. Things become possible.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a state before a back sheet of a urine pad of the present invention is separated.

FIG. 2 is a sectional view showing a state in which an opening is formed in a back sheet of the urine pad of the present invention.

FIG. 3 is a cross-sectional view showing an example different from FIG. 1 and showing a state before the back sheet of the urine pad of the present invention is separated.

FIG. 4 is a plan view of the urine pad of the present invention shown in FIG. 1 as viewed from the back sheet side.

5 is a plan view showing an example different from FIG. 4 when the urine pad of the present invention shown in FIG. 1 is viewed from the back sheet side.

6 is a plan view showing an example different from FIGS. 4 and 5 when the urine pad of the present invention shown in FIG. 1 is viewed from the back sheet side.

FIG. 7 shows an example different from FIGS. 4, 5 and 6;
1 is a plan view of the urine pad of the present invention shown in FIG.

FIG. 8 is a cross-sectional view when the urine pad of the present invention is used as a replacement absorbent.

FIG. 9 shows a cross-sectional view when the urine pad of the present invention is used as an auxiliary absorber.

[Explanation of symbols]

 1. Urine pad 2. 2. Use diapers. 3. Liquid permeable topsheet 4. Liquid-impermeable backsheet Absorber 6. Floc pulp 7. 7. super absorbent polymer 8. Liquid permeable topsheet of used diaper Opening 10. Solid gathers 11. Elastic elastic member 12. Side seat 13. 13. Liquid-impermeable backsheet for disposable diapers Elastic elastic member around the leg 15. Absorbent for disposable diapers 16. Mounting means 17. Separation means (perforation) 18. Separation means (tears) 19. Separation means (cut) 20. Liquid impermeable sheet 21. Joining means

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3B029 BA03 BA04 BA05 BA17 BA18 BB07 BD12 BD13 BD15 BD18 BD19 BD21 BG06 CB02 CB12 CB13 4C003 CA01 EA00 HA00 4C098 AA09 CC10 CC16 CC28 CE05 CE06

Claims (2)

[Claims] 1. An absorbent article having a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorber disposed between these two sheets, wherein at least a part of the backsheet has a backsheet. An absorbent article, wherein a separating means is formed. 2. The absorbent article according to claim 1, wherein a detachable attaching means is arranged on a part of said back sheet.