JP2003159275A - Disposable diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable diaper that is easy to attach, is appropriate in fitting feeling, and is decreased in humidity to be excellent in the wearing feeling. <P>SOLUTION: This disposable diaper is characterized in that, in the disposable diaper comprising a liquid permeable top sheet having a front part, a back part, and an inside leg area placed between the front part and the back part, a liquid impermeable and moisture permeable back sheet, and an absorbing body installed between these sheets, an expanding and contracting elastic material having air permeability is installed and fixed with an adhesive in an expanding manner in the width direction of the diaper at a waist area of the both ending edges in the long arm direction of the front part and the back part of the disposable diaper between the top sheet and the back sheet, and in at least one side of the expanding and contracting elastic material, an area without the adhesive is formed in the width direction and the waist area of the front part and the back part is bent to the side of the back sheet. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called tape-type disposable diaper having fixing means for fixing a diaper to a wearer on a side flap of a rear body. More specifically, the present invention relates to a disposable diaper that is easy to wear, has a proper fit, and reduces stuffiness and has an excellent wearing feeling.

[0002]

2. Description of the Related Art A diaper for use is Japanese Patent Publication Sho-52-402.
Like the deployable diaper disclosed in Japanese Patent No. 67,
It has a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent body that is placed between these sheets, and uses a liquid-permeable topsheet for excrement such as urine excreted during wearing. It is used as a liquid-impermeable backsheet to prevent excrement from leaking out of the absorbent wearable article through an absorbent body, and the absorbent article can be used depending on its use. Various forms such as an elastic elastic member and a fastener are proposed so that they can be suitably used as.

[0003] These diapers for use are now widely used for infants, adult incontinence persons and those who cannot self-regulate excretion of urine and feces.
A basic structure is one in which an absorbent body is sandwiched between a liquid-permeable top sheet and a liquid-impermeable back sheet, and a tape type comprising a stretchable elastic member and a fastener such as an adhesive tape, or Those that have been previously molded into a pants type are widely used.

[0004]

SUMMARY OF THE INVENTION These disposable diapers have various improvements for reducing leakage of urine and feces from the diaper during wearing and for reducing diaper rash and stuffiness during wearing. In recent years, a breathable plastic film is used as a liquid impermeable back sheet, and a non-woven fabric sheet is further laminated on the back sheet to make the feel of the wearer close to that of underwear. A new type of disposable diaper for infants has been devised, and this is the mainstream.

Further, in order to enhance the fit to the wearer and to prevent leakage due to misalignment during wearing, elastic elastic members are provided in a stretched state in the front and rear waist regions and leg regions.

Sheet-like members are often used as the elastic members to be disposed in the front and rear waist regions. This is because the size around the torso fluctuates significantly due to before and after meals, standing and sitting, and it is easier for the wearer's body to come into contact with the body to follow this fluctuation. However, if an attempt is made to improve the fit around the waist, the waist area of the diaper is pressed against the wearer's body after use and tends to cause stuffiness. When a sheet-shaped member is used as the stretchable elastic member, there is a problem that more parts are pressed against the wearer's body, and thus stuffiness is more likely to occur.

In order for the wearer to wear the diaper comfortably while using it, it is important to keep the humidity in the diaper low. Therefore, recently, it has become common to use a moisture permeable film that does not allow liquid to permeate through the back sheet but allows vapor to permeate through. A stretchable elastic member having breathability is often used also in the stretchable elastic members disposed in the front and rear waist regions of the diaper that is being used.

The stretchable elastic member is arranged between the top sheet and the back sheet, and the fixing method is generally fixing with an adhesive. In this case, the adhesive is often applied over the entire area of the stretchable elastic member, and even if the stretchable elastic member having air permeability is used, the air permeability may be hindered by the adhesive. .

[0009] In addition, such a disposable diaper is often curved inward (top sheet side) when it is unfolded, and it is difficult to spread the diaper flat, and therefore it is difficult to wear the diaper, When the wearer was a baby, it took a long time to wear it because the movement was intense.

The present invention provides a diaper for use in the past, in which the above problems of the conventional diaper are improved, the diaper is easy to put on, provides an appropriate fit and reduces discomfort due to stuffiness. That is the purpose.

[0011]

The present invention comprises a front body which covers the abdomen of the wearer when worn, a back body which covers the back, and a crotch region located between these front and back bodies. A liquid-permeable topsheet, a liquid-impermeable and moisture-permeable backsheet, and an absorbent body disposed between these sheets, wherein the front body of the disposable diaper And in the waist circumference area on both longitudinal edges of the back body,
A stretchable elastic member having air permeability is disposed between the topsheet and the backsheet in a state of being stretched in the width direction of the diaper and fixed by an adhesive, and at least one surface of the stretchable elastic member is provided. The present invention relates to a disposable diaper having a region in which an adhesive is not provided in the width direction thereof, and the waist regions of the front and rear bodies are curved toward the back sheet.

The present invention also relates to a disposable diaper characterized in that the elastic elastic member is a breathable urethane foam having open cells.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The disposable diaper of the present invention comprises a stretchable elastic member having air permeability between a top sheet and a back sheet in the waist circumference region at both longitudinal edges of the front body and the back body. The stretchable elastic member is arranged in a state of being stretched in the width direction and fixed by an adhesive, and a region where no adhesive is provided in the width direction is formed on at least one surface of the elastic elastic member, and The waist area is curved toward the back seat.

When the diaper according to the present invention having such a structure is worn, it is excellent during wearing due to the breathable stretchable elastic members provided at both edges of the front body and the back body of the diaper. A good fit is obtained and stuffiness is improved. Furthermore, since the waist circumference region of the front and rear bodies is curved toward the back sea side, the disposable diaper of the present invention is easy to unfold when the diaper is unfolded for wearing, and when placed under the wearer's body. Moreover, the position can be easily determined, the mounting becomes easy, and the mounting time can be shortened.

When the stretchable elastic member around the waist is made of a breathable urethane foam having open cells, the material is soft to the wearer's skin even if it is crimped around the waist of the wearer in an expanded state. The addition of is small and it is hard to leave a mark. In addition, since breathable urethane foam also has breathability in the thickness direction of the diaper, even if it is in continuous contact with the wearer's waist in the width direction, vapor inside the diaper is also released in the lengthwise direction. It is possible to further reduce the discomfort caused by the stuffiness of the wearer.

In the present invention, the waist elastic elastic member is fixed to the top sheet and the back sheet with an adhesive. The method of applying the adhesive is not particularly limited, but the adhesive area for adhering the waist elastic member and the top sheet and the back sheet is an area having no adhesive in the width direction of the elastic member on at least one surface thereof. Is provided. The stretchable elastic member used in the present invention has air permeability, but if an adhesive is provided on both sides of the stretchable elastic member for fixing to the top sheet and the back sheet, the breathability of the stretchable elastic member is hindered, Combined with the compression of the elastic member to the skin, it becomes stuffy and makes the wearer uncomfortable. Therefore, by providing an area having no adhesive on at least one surface of the elastic elastic member in the adhesive area for fixing the elastic elastic member to the top sheet and the back sheet, it is possible to reduce stuffiness. become.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The diaper used in the present invention will be described in detail below with reference to the drawings, but the present invention is not limited thereto. FIG. 1 is a plan development view of a used diaper of the present invention viewed from the top sheet side, showing a state in which a part of the top sheet is cut away. In FIG. 1, the diaper 1 to be used is composed of a front body 2 that covers the wearer's abdominal side when worn, a back body 4 that covers the back side, and a crotch portion 3 provided between the front body 2 and the back body 4. It is configured.
The diaper 1 to be used is basically composed of a liquid-permeable top sheet 5, a liquid-impermeable and moisture-permeable back sheet 6, and an absorbent body 7 arranged between these sheets. The outermost layer sheet 8 is arranged on the outer side of the back sheet 6 (the side facing the outer surface of the diaper when the diaper 1 is worn by using it). Side sheets 9 are arranged on both sides of the top sheet 5, a pair of three-dimensional gathers 10 are formed by the inner side edges of the diaper of the side sheet 9, and three-dimensional gather elastic members 11 are arranged on the inner side edges of the three-dimensional gathers. ing. A pair of left and right elastic elastic members 12 around the legs are provided between the side sheet 9 and the back sheet 6 on both side edges of the absorber 7.
Are arranged. A waist elastic member 13 is disposed between the top sheet 5 and the back sheet 6 at both longitudinal edges of the front body and the back body in the longitudinal direction. A pair of fastening tapes 14 having adhesive fixing means are arranged on both side edges of the back body 4, and the outermost sheet 8 of the front body 2 is provided.
The target tape 15 is arranged on the surface.

FIG. 2 is a cross-sectional view showing a state in which the disposable diaper 1 shown in FIG. 1 is cut along the line AA '. In FIG. 2, the top sheet 5 and the waist elastic elastic member 13 are joined by an adhesive 16a, and a region having no adhesive is formed in the central portion of the elastic elastic member 13 in the width direction. The back sheet 6 and the stretchable elastic member 13 are intermittently joined by an adhesive 16b, and the back sheet 6 and the outermost layer sheet 8 are intermittently joined by an adhesive 16c. In this case, the waist elastic elastic member 13
Are arranged in an expanded state so that the diaper is curved toward the back sheet 6.

FIG. 3 is a cross-sectional view of an example different from that of FIG. 2, showing a state in which the disposable diaper 1 shown in FIG. 1 is cut along the line AA '. In FIG. 3, the waist elastic member 13 is intermittently joined to the top sheet 5 side and the back sheet 6 side by adhesives 16a and 16b.

In the present invention, the top sheet 5 may be a liquid-permeable nonwoven fabric made of synthetic fibers made of polyethylene, polypropylene, polyester or other thermoplastic resins.

As the back sheet 6, a liquid-impermeable polyethylene sheet is used, and preferably a polyethylene sheet having fine pores or a liquid-impermeable sheet obtained by adding a filler to a thermoplastic resin and stretching the sheet is used. Moisturizing is more comfortable as it improves stuffiness.

As the outermost layer sheet 8, polyethylene,
It is possible to use a liquid-permeable nonwoven fabric made of synthetic fibers made of polypropylene, polyester, or other thermoplastic resin as a raw material.

As the side sheet 9, polyethylene,
It is possible to use a liquid-permeable nonwoven fabric made of synthetic fibers made of polypropylene, polyester, or other thermoplastic resin as a raw material.

The absorbent body 8 may have any shape within the range where the object of the present invention is achieved, but it is preferable to use fluff pulp as a main material together with a superabsorbent polymer, and other absorbent paper. A single material, a mixture of heat-bonded fibers, or a laminate is used. Further, it is preferable to have a laminated structure in which the whole is wrapped with tissue.

The three-dimensional gather elastic elastic member 11 and the leg elastic elastic member 12 are elastic elastic members such as urethane thread and rubber thread, and are arranged in an expanded state, respectively, and are arranged in a longitudinal direction of the absorbent article by a hot melt adhesive. Is fixed to a predetermined area with a length shorter than the total length of the.

The waist elastic elastic member 13 is an elastic elastic member such as a urethane film or urethane foam, and a plurality of urethane threads, rubber threads or the like fixed to the breathable sheet in an expanded state can be used. . In particular, since urethane foam is a soft material and has a large thickness, it is easy to escape the vapor inside the diaper in the longitudinal direction, and therefore, it is more preferably used.

The fastening tape 14 is formed with a fastening means which is detachably attached to the diaper and which comprises an adhesive layer or a surface fastener. When the fastening means is formed by an adhesive layer, a rubber-based adhesive, a silicone-based adhesive, a silicone synthetic rubber-based adhesive, an acrylic-based adhesive, a silicone-containing acrylic-based adhesive, and a silicone-based adhesive,
It is possible to use the same adhesive as that used for conventional fastening tapes and disposal tapes.

When the fastening means is a hook-and-loop fastener, Velcro (registered trademark; manufactured by Velcro), Quicklon (registered trademark; manufactured by YKK), MagiCross (registered trademark; manufactured by Kanebo Bell Touch) A known sheet such as a sheet provided with a large number of key-shaped or mushroom-shaped convex hook members can be used without particular limitation.

[0029]

EFFECTS OF THE INVENTION The disposable diaper of the present invention has an excellent fit during wearing and can reduce stuffiness caused by sweat and urine in the diaper, so that a more comfortable wearing feeling can be obtained. . Also, the mounting becomes easy, and the burden at the time of mounting can be reduced.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan development view of a disposable diaper of the present invention viewed from a top sheet side.

FIG. 2 is a cross-sectional view showing a state in which the disposable diaper of FIG. 1 is cut along the line AA ′.

FIG. 3 is a cross-sectional view of an example different from FIG. 2, showing a state in which the disposable diaper of FIG. 1 is cut along the line AA ′.

[Explanation of symbols]

1: Used diaper 2: Front body 3: Inseam 4: back body 5: Top sheet 6: Back sheet 7: Absorber 8: Outermost layer sheet 9: Side seat 10: Three-dimensional gather 11: Three-dimensional gather elastic member 12: Leg elastic elastic member 13: waist elastic elastic member 14: Fastening tape 15: Target tape 16a, 16b, 16c: adhesive

Claims (2)

[Claims] 1. A front body which covers the wearer's ventral side when worn,
A back body covering the back side and a crotch region located between these front and back bodies, and a liquid-permeable top sheet, a liquid-impermeable and moisture-permeable back sheet, and a space between these two sheets. In a disposable diaper provided with an absorbent body disposed in the front and rear bodies of the disposable diaper, a ventilation area is provided between the top sheet and the back sheet in the waist region of both longitudinal edges of the front body and the back body. Stretchable elastic member is arranged in a state of being stretched in the width direction of the diaper and fixed by an adhesive, and at least one surface of the stretchable elastic member,
A region where no adhesive is provided is formed in the width direction, and
A disposable diaper characterized in that the front and rear body waist regions are curved toward the back seat. 2. The disposable diaper according to claim 1, wherein the elastic member is a breathable urethane foam having open cells.