JPH11347066A - Absorptive article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an absorptive article to be securely and easily put on a suitable location and to obtain an excellent displacement prevention function by laminating soft polyurethane foam on the outside of the backside material of an absorptive article laminated with a liquid permeable surface material, a liquid retaining core material, and a liquid impermeable backside material. SOLUTION: This absorptive article such as a sanitary napkin is made by laminating a surface material 1 and a backside material 3 and filling a liquid retaining material 2 between the surface material 1 and the backside material 3. Soft polyurethane foam 4 is further adhered to the outside of the backside material 3. Since soft polyurethane foam 4 has high static friction coefficient, displacement of the absorptive article against shorts can be prevented. The polyurethane foam 4 like that is to be attached partially or on the whole part and stuck by using an adhesive or a both face adhesive tape or by heat fusion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a sanitary napkin,
The present invention relates to an absorbent article used for applications such as a pad for incontinent persons and a pad for treating vaginal discharge. In particular, the present invention relates to an absorbent article having a characteristic that it can be accurately and easily worn at an appropriate position of a wear site, and is hardly shifted from a predetermined position after wearing.

[0002]

2. Description of the Related Art Absorbent articles such as sanitary napkins have been considerably improved in their construction, types and performance of liquid-absorbing materials and surface materials constituting the articles, and methods of wearing them. As a result, products having excellent performance and handleability have become available. However,
In actual use, there still remains a problem that needs to be improved, such as liquid leakage or slippage during wearing. In conventional absorbent articles, the main causes of liquid leakage are that the absorbent articles may not be installed at the appropriate positions on the wear site and may not be able to sufficiently cover the required areas, and the movement of the user after wearing may occur. This causes the absorbent article to be displaced from its normal position.

[0003] As means for preventing displacement after wearing,
Generally, a double-sided adhesive tape is used, which is attached to the outside of the backing material of the absorbent article. However, when the shorts are fixed to the shorts with the adhesive tape, the position is not easily changed, and as a result, the user takes time to mount on the correct part, and the adhesive strength is reduced when the user re-attaches. In addition, the adhesive tape portions may stick to each other and may not be used.

Further improvements have been made to avoid this.
For example, Japanese Unexamined Patent Publication No. Hei 5-103813 discloses an absorbent article having adhesive portions provided on both left and right side edges of a vertically formed absorbent article so that the absorbent article can be adhesively fixed to shorts. Articles are disclosed. However, even with this absorbent article, it is not easy to accurately attach the shorts to an appropriate position at one time, and it is necessary to remove and attach the fixing piece several times to set the appropriate position, and Since the fixing piece was folded back, it was difficult to wear it properly depending on the size of the shorts.

As a further improvement, a non-slip effect due to irregularities of expandable particles is used instead of using a double-sided adhesive tape as a means for fixing an absorbent article to shorts (Japanese Utility Model Application Laid-Open No. 63-65426). And JP-A-63-1
No. 17754). Further, Japanese Utility Model Laid-Open No. 5-28329 discloses a back surface material having a non-slip effect, which is bonded with a high friction composite fiber nonwoven fabric. However, even with these, a sufficient shift prevention effect has not been obtained.

[0006]

DISCLOSURE OF THE INVENTION The present invention provides an absorbent article, in particular, an easy-to-appropriate part to be worn properly, and has an excellent function of preventing displacement. To provide an absorbent article with reduced odor.

[0007]

SUMMARY OF THE INVENTION The present invention relates to an absorbent article comprising a liquid-permeable surface material, a liquid-retentive core material and a liquid-impermeable backing material laminated on each other. Furthermore, it relates to an absorbent article laminated with a flexible polyurethane foam.

The absorbent article of the present invention can prevent the occurrence of wrinkles and sagging during handling, does not cause any discomfort at the time of wearing due to the tension caused by wrinkles or sagging, and reduces the adhesive strength once applied. There is no problem of improper fixation, and it can always be worn without slack or tension. In addition, since a flexible polyurethane foam is used as an anti-slip material, the coefficient of friction is high, and the occurrence of displacement during use is far less than when a non-woven fabric is used. in addition,
Even if the position shifts during use, there is an advantage that the position can be easily corrected.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The absorbent article of the present invention has a flexible polyurethane foam for preventing displacement during use, attached to the outside of the back material which is in contact with the shorts. Since the flexible polyurethane foam has a high coefficient of static friction, even if the user moves a little during wearing, it is possible to prevent the occurrence of displacement from the shorts. The flexible polyurethane foam that can be used in the present invention is not particularly limited, and all ordinary types can be used.

The flexible polyurethane foam may be attached to the entire surface of the backing material, or may be partially attached as shown in FIG. It is preferable to increase the mounting area of the flexible polyurethane foam as much as possible in order to prevent slippage more sufficiently, but it is preferable that the back surface material reaches the surface material side so as to cover the liquid retaining material and the surface material. In such a case, if the flexible polyurethane foam is attached to the entire surface of the back material, the flexible polyurethane foam also comes out to the surface material side, so that the flexible polyurethane foam may directly contact the skin and cause an uncomfortable feeling. In such a case, it is preferable to limit the mounting area of the flexible polyurethane foam so that the flexible polyurethane foam does not protrude to the surface material side, as shown in FIG. .

There is no particular limitation on the attachment of the flexible polyurethane foam to the backing material, and an adhesive or a double-sided tape may be used, or heat bonding may be used.

The thickness of the flexible polyurethane foam is preferably as thin as possible within a range where a sufficient frictional resistance can be secured. If it is too thick, the absorbent article itself becomes thick and discomfort due to wearing increases. The preferred thickness is 20 mm or less,
More preferably, it is 3 mm or less. In the absorbent article of the present invention, there is no particular limitation on the surface material, liquid retaining material and back material except for the flexible polyurethane foam as long as they are laminated in this order.

The backing material is preferably a liquid-impermeable material having a high wet strength and a soft material. All materials conventionally used for this purpose can be used. In particular, soft plastic films such as polyethylene, polypropylene, vinyl acetate, and ethylene vinyl acetate are preferable. As the liquid-retaining material, cotton-like pulp, water-absorbing paper, or the like can be used, but a water-absorbing polymer material is more preferable in terms of the liquid absorption amount and the retention performance. The surface material is a liquid-permeable material, and any material conventionally used for this purpose can be used without any problem. Examples of such a material include a woven fabric, a nonwoven fabric, a net made of synthetic fibers and natural fibers, and a perforated sheet such as plastic or water-resistant paper.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 shows a first embodiment of the absorbent article of the present invention. Here, the surface material 1 and the back material 2 are laminated, and the liquid retaining material 3 is packed between the laminated surface material and the back material. A flexible polyurethane foam 4 is attached to the outside of the back material 2.

FIG. 2 shows a second embodiment. In this example, the back material wraps around the surface material and the liquid-retentive material and reaches the surface material side.However, the flexible polyurethane foam comes out of the surface material side and avoids contact with the skin to avoid contact with the skin. It is not affixed to the entire surface, but is fastened to the side. Although this structure has a complicated structure as compared with the first example, since the sides are completely covered with the liquid-impermeable material, there is no fear that the shorts and skin are stained by the absorbed liquid.

FIG. 3 is an example of the absorbent article of the present invention viewed from the back material side. (A) to (d) all show examples in which the flexible polyurethane foam is partially adhered to the back material, not to the entire surface, and all belong to the present invention.

[0017]

The liquid-absorbent article of the present invention is characterized by using a flexible polyurethane foam on the back surface and utilizing its high coefficient of static friction. This eliminates handling problems such as adhesive parts sticking together, unlike the ones that use fixing means such as adhesive tape, makes it easy to correct the position once attached, and regardless of the size of the shorts It can be easily attached to an appropriate site. In addition, there is no displacement during use, and discomfort is extremely small.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an example of a liquid-absorbent article of the present invention.

FIG. 2 is a cross-sectional view illustrating another example of the liquid-absorbent article of the present invention.

FIG. 3 is a schematic view showing an example of attaching a flexible polyurethane foam in the liquid-absorbent article of the present invention.

[Explanation of symbols]

 1: front surface material, 2: back surface material, 3: liquid retention material, 4: flexible polyurethane foam.

Claims (1)

[Claims] 1. An absorbent article comprising a liquid-permeable surface material, a liquid-retentive core material, and a liquid-impermeable backing material, wherein a flexible polyurethane foam is further laminated outside the backing material. Products.