KR101723811B1 - Disposable absorbent articles - Google Patents

Abstract

The present invention relates to a disposable absorbent product, and more particularly, to a disposable absorbent product which comprises a plurality of convex embossed single sheet layers having a predetermined opening ratio and contacting the wearer's skin when worn, The present invention relates to a disposable absorbent product having a reduced contact area with the skin to improve the diffusion characteristics of urine, prevent spreading of fluid of high viscosity, increase air permeability, and exhibit excellent urine permeability. Disclosed is a disposable absorbent article which can mitigate and improve skin troubles to improve the skin protection effect and sufficiently protect the skin of the wearer from moisture and heat.

Description

Disposable absorbent articles {

The present invention relates to a disposable absorbent product, and more particularly, to a disposable absorbent article which comprises a plurality of convex embossed layers having a predetermined opening ratio and contacting the wearer's skin when worn, The present invention relates to a disposable absorbent product which is in contact with the skin to reduce the contact area of the skin, improve the diffusion characteristics of urine, prevent the spread of the fluid of high viscosity, increase the breathability, and have excellent permeability to urine. To improve the skin protection effect and to sufficiently protect the skin of the wearer from moisture and heat.

Disposable absorbent products absorb body fluids such as blood, urine, and menstrual blood, and are hygienic and convenient during use. Generally, disposable absorbent products are products that absorb urine, feces, menstrual secretions and vaginal secretions that absorb secretions excreted by various physiological functions of the wearer (for example, urine, blood, menstrual blood, etc.) Specifically, there are disposable diapers, sanitary napkins, panty liners, etc. used by infants or incontinence persons.

Such a disposable absorbent article is an ultra-thin form that increases the absorbent capacity of the absorbent core and makes the thickness thinner to quickly absorb the secretions (e.g., urine, blood, menstrual blood, etc.) excreted by the wearer and provide comfort in use . This makes it possible to wear the disposable absorbent article for a relatively long period of time.

As disposable absorbent products are worn for a relatively long period of time, the skin is prone to moisture and heat due to the secretion excreted by the various physiological functions of the wearer, and the ventilation is also poor. Especially, There is still a problem to give. That is, the upper sheet, which directly contacts the skin of the wearer, includes a surface that comes into contact with the wearer's skin when worn. Generally, the upper sheet has a large surface contact with the wearer's skin after urination to adversely affect the wearer's skin .

Disposable absorbent products in the form of embossing convex embossing or forming a plurality of openings in a fiber layer made of staple fibers or continuous filaments made of a thermoplastic material have been developed in order to reduce the contact surface with the skin and increase the spreadability of the liquid have.

However, in the case of the upper sheet having the convex embossing, the cushioning feeling and the softness are improved, the skin contact surface is reduced, and the convex embossing layer can prevent the backflow of the liquid, but the urine can hardly be injected quickly. In addition, in the case of an upper sheet having a plurality of openings, urine can be expected to be injected quickly, but the effect of the convex embossing can not be expected. Therefore, a technique of combining an opening in a convex embossed area and a convex embossed area, or forming a corrugated cardboard shape and an opening in a lower area, has been developed. However, all of them are provided by stacking two or more nonwoven fabrics.

In this case, it is difficult to apply two or more nonwoven fabrics to a substantially disposable absorbent article. In addition, when the convex emboss is formed only at a certain height, it is difficult to increase the urine absorption rate due to the presence of the opening region, and when the perforated nonwoven fabric is formed in all areas of the embossed portion, There is a concern that the degree of skin irritation may be increased by the cut nonwoven fabric at the perforated region on the prominent convex emboss.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above problems occurring in the prior art, and it is an object of the present invention to provide a cushioning pad, A disposable absorbent product capable of preventing backflow of liquid by a convex emboss layer and capable of rapid introduction of urine by the opening.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise forms disclosed. Other objects, which will be apparent to those skilled in the art, It will be possible.

According to an aspect of the present invention, there is provided a disposable absorbent article comprising an upper sheet directly contacting skin of a wearer, wherein the upper sheet is a single sheet having a plurality of embossed embossments, And the upper sheet is formed so as to have a predetermined opening ratio (a ratio of the number of convex embosses to the total number of openings having a constant diameter).

And the upper sheet is formed to have an opening ratio of 0.1 to 70%.

The basis weight of the upper sheet is 15 to 70 g / m 2.

The upper sheet is made of a plurality of staple fibers or continuous filament materials.

According to the present invention, when the disposable absorbent article is worn, the surface contacting the skin of the wearer is constituted by a convex embossed single sheet layer having a constant aperture ratio, whereby the convex embossed portion contacts not the entire upper sheet but the skin contact area Can be reduced, the diffusion property of urine can be improved, the spread of the liquid of high viscosity can be prevented, the breathability can be increased, and the disposable absorbent product having excellent urine permeability can be provided.

Therefore, it is possible to improve the skin protection effect by alleviating and improving the skin troubles that may occur when the disposable absorbent article is worn, and to sufficiently protect the wearer's skin from moisture and heat even when it is not frequently changed.

1 is a plan view showing a disposable absorbent product according to the present invention in an open state;
FIG. 2 is a partial cross-sectional view taken along line AA of FIG. 1; FIG.
3 is a schematic view showing an upper sheet of a disposable absorbent article according to the present invention.

Hereinafter, preferred embodiments of the disposable absorbent article according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a plan view showing a disposable absorbent article according to the present invention in an open state, FIG. 2 is a partial cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 is a schematic view showing a top sheet of the disposable absorbent article according to the present invention to be.

1, the disposable diaper D comprises a liquid-permeable upper sheet 6, which is in direct contact with the wearer's skin when worn, a liquid-impermeable back sheet 4 which forms an outer surface when worn, An absorbent core 5 positioned between the sheet 6 and the backsheet 4, a waistband 21 formed with elastic means, padding bands 8, 9 and fastening means.

Of the components of the disposable diaper D, the upper sheet 6 is located in the upper part of the absorbent core 5 (in the direction of contact with the skin of the wearer) and is attached by means of adhesive such as hot melt adhesive, heat or ultrasonic And adhered to the back sheet 4. The upper sheet 6 is preferably made of a material that is soft and does not irritate the wearer's skin. The upper sheet 6 is made of a nonwoven fabric or a nonwoven fabric or a nonwoven fabric having holes formed therein, which is liquid-permeable for easily passing a liquid (for example, urine) through hydrophilic treatment.

The absorbing and diffusing layer 7 is optionally disposed between the topsheet 6 and the absorbent core 5 and is liquid permeable for easy passage of the liquid and adhered to each of the materials by means of hot melt adhesive, heat or ultrasonic waves .

The backsheet 4 is positioned adjacent to the absorbent core 5 in the opposite direction of contact with the skin of the wearer and is adhered to the absorbent core 5 and the topsheet 6 by means of a solid adhesive or heat. The back sheet 4 is also liquid impermeable and functions to prevent body fluids absorbed by the absorbent core 5 from escaping from the disposable diaper D and contaminating the wearer's clothing and the surroundings. The back sheet 4 is generally made of a thin plastic film, and an inorganic material such as calcium carbonate is added and formed (extruded or extruded) to form fine holes in the film so that steam can escape from the absorbent core 5 .

A suitable material for the backsheet 4 is a thermoplastic film having a weight of 10 g / m 2 to 30 g / m 2, preferably a polyethylene film or a polypropylene film. The back sheet 4 is provided with a nonwoven fabric 23 on the outer surface of the plastic film 22 to provide a smooth surface feel (softness). The nonwoven fabric 23 may be adhered to the plastic film 22 with a width equal to the width of the plastic film 22 and preferably the plastic film 22 is reduced to the same width as the width of the absorbent core 22, The size of the disposable diaper D is made equal to the entire width of the diaper D in the lateral direction.

The absorbent core 5 is positioned between the topsheet 6 and the backsheet 4 and absorbs fluid rapidly through the topsheet 6 to prevent the absorbed body fluid from contacting the skin again To absorb and retain body fluids. The absorbent core 5 is composed of a fluff pulp, a superabsorbent polymer, a tissue or a nonwoven fabric, and has a wide variety of sizes and shapes (for example, Shape, " T " shape, asymmetric shape, etc.).

The disposable diaper D is generally constructed by forming padding bands 8 and 9 on the left and right sides of the absorbent core 5 so as to prevent a body fluid that is separated from the absorbent core 5 from leaking. . The pendant bands 8 and 9 are connected to the pendant band flap 11, the pendant band flap adhering portion 12, the pendant band end portion 13, the pendant band end attaching portion 14, the pendant band elastic body 15, (16, 17).

The pseudo band flap 11 is configured to stand up at least on the crotch portion by the elastic band 15 to form a pocket in the outside of the absorbent core 5 to thereby confine the body fluid released from the absorbent core 5, prevent. The pendant bands 8 and 9 are made of a hydrophobic nonwoven fabric or a waterproof nonwoven fabric film. The hydrophobic nonwoven fabric material is formed with two ply band flaps 11 to enhance the hydrophobic effect, 11 may be adhered with a solid adhesive. The hydrophobic nonwoven fabric generally has a weight of 10 to 30 g / m 2.

In addition, the pendant bands 8 and 9 are connected to the pendant band flap 11 between the pendant band flap adhering portion 12 and the pendant band end portion 13 so that the pendant band end portion 13 comes into close contact with the skin of the baby. And the modulus of elasticity of the cohesive band elastic body 15 is set in the range of 150 to 230%, but preferably 180 to 200%. The elastic band 15 is mainly composed of a polyurethane spandex or natural rubber.

The diaper band flap 11 is a portion where the diaper band flap 11 is in contact with the baby's skin and the diaper band flap adhering portion 12 is a portion in which the diaper band flap 11 is disposed on the absorbent core 5 In the longitudinal direction of the disposable diaper D to the side flaps 16, 17 on the outer side. The pseudo band side flaps 16 and 17 are parts of the pseudo band 8 and 9 extending to the transversely outer edge of the disposable diaper D including the pseudo band flap adhering portion 12, And adhered and fixed to the back sheet 4 or the top sheet 6 by adhesive or heat.

On the other hand, the pseudo band flap 11 is disposed on at least the crotch portion of the disposable diaper D along the longitudinal bonding point of the pseudo band flap adhering portion 12 of the disposable diaper D and the pseudo band inner side flap 16, Band outer side flap 17, and the width of the false band side flaps 16 and 17 is appropriately set to 20 to 50 mm, preferably 15 to 35 mm.

The dagger band end adhesive portion 14 is formed in such a manner that the dagger band flap 11 forms the absorbing pocket by the dagger band flap adhesive portion 12 and the dagger band elastic body 15, Is an adhesive portion for fixing the band flap 11 to the inside or outside of the band flap bonding portion 12. It is preferable that the adhesive band end adhering portion 14 is partially formed to be fixed on the absorbent core 5 and the non-adhesive portion is not formed on the side band flaps 16 and 17 on the outer side of the absorbent core 5. The length of the adhesive band end adhesive portion 14 is formed to be 30 to 100 mm from the longitudinal ends of the front waist portion 1 and the back waist portion 3 of the disposable diaper D.

The fastening means 19, 20 are used to hold the disposable diaper D described above on the wearer's body. The fastening means 19, 20 are usually made of a re-adhesive tape or a hook-and-loop system System) is used. In addition, each material is adhered and fixed by hot melt adhesive, heat seal, or other adhesive method. The fastening means 19 and 20 are mainly composed of a re-adhesive fastening means fixing portion 18 fixed to the edges of the false band side flaps 16 and 17 of the back waist portion 3 of the disposable diaper D and an unfixed free end portion And a front fastening means 20 for forming a target area in which the re-adhesive fastening means 19 is glued to the front waist portion and formed in the transverse direction.

Next, the waistband 21 is formed by adhering an elastic body to the waist portion of the disposable diaper D. Polyurethane foam, polyurethane film, polyurethane non-woven elastic body and elastic room are used for the waistband elastic body, and polyurethane spandex or natural rubber is used for the elastic room. The waistband 21 may be formed across the entire width of the disposable diaper D in the transverse direction between the longitudinal end portion of the disposable diaper D and the outside of the absorbent core 5 or may be formed partially short.

Meanwhile, in the present embodiment, the upper sheet 6 has a configuration as shown in FIG. A plurality of convex embosses 24 are formed on the upper sheet 6 and a plurality of openings 25 are formed on the upper end of the convex emboss 24. The opening 25 is irregularly formed at the upper end of the convex emboss 24 and is formed by cutting the upper end of the convex emboss 24.

The aperture ratio in this embodiment means the ratio of the convex embossment 24 formed with the opening 25 having a predetermined size (diameter) in the convex embossment 24. For example, if a total of 10 convex embosses 24 are formed on the upper sheet 6, and if three convex embosses 24 are formed with openings 25 having a diameter of 1 mm, the aperture ratio is 30% do. When the convex emboss 24 has the aperture 25 smaller than 1 mm in diameter, an aperture ratio of 0.1 to 0.9% or the like may be measured.

The upper sheet 6 is preferably formed with an opening 25 having an opening ratio of 0.1 to 70% and the upper sheet 6 is composed of a single sheet on which the convex emboss 24 is formed. If the upper sheet 6 has an opening ratio of 70% or more, the surface of the upper sheet 6 may be rough and may cause skin irritation. If the opening ratio is 0.1% This is because urine can not be injected quickly. As described above, the opening ratio at the upper end of the convex embossment 24 of the upper sheet 6 is preferably 0.1 to 70%, and more preferably 5 to 60%.

The basis weight of the upper sheet 6 is preferably 15 to 70 g / m 2, more preferably 20 to 35 g / m 2. When the basis weight is 15 g / m 2 or less, the opening ratio is 90% or more when the convex emboss 24 is formed. If the basis weight is 70 g / m 2 or more, formation of the opening 25 is not easy and rapid absorption of the excrement is difficult. The re-wetting phenomenon of re-wetting the moisture causes problems to adversely affect the wearer's skin.

As the material forming the convex embossed (24) single sheet layer having the constant aperture ratio, a plurality of staple fibers, a nonwoven fabric made of continuous filaments, a film, or the like can be selectively used.

Hereinafter, the present invention will be described in detail with reference to specific embodiments of the above-described top sheet 6. [ However, the following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[Example 1]

In the disposable absorbent article configuration, the disposable absorbent article of Fig. 2 is characterized in that a top sheet 6 is formed with a single sheet having a convex emboss 24 with an opening ratio of 1%.

[Example 2]

In the disposable absorbent article configuration, the disposable absorbent article of Fig. 2 is characterized in that the top sheet 6 is a single sheet having a convex emboss 24 with an opening ratio of 30%.

[Example 3]

In the disposable absorbent article configuration, the disposable absorbent article of Fig. 2 is characterized in that a top sheet 6 is formed with a convex emboss 24 having an opening ratio of 60%.

[Example 4]

In the disposable absorbent article configuration, the disposable absorbent article of Fig. 2 is characterized in that the top sheet 6 is a single sheet having the convex embossed 24 with an opening ratio of 70%.

[Comparative Example 1]

In the disposable absorbent article configuration, a disposable absorbent article in which the top sheet 6 has a 0% opening ratio and does not form the convex emboss 24 is produced in Fig. 2.

[Comparative Example 2]

In the disposable absorbent article configuration, a disposable absorbent article was produced in Fig. 2, characterized in that a top sheet 6 had a 90% open area ratio and a convex emboss 24 formed therein.

The disposable absorbent articles prepared above were tested and evaluated according to the following test methods, and the results are as follows.

Disposable absorbent products using the top sheet according to the opening ratios of Examples 1 to 4 and Comparative Examples 1 to 2 were prepared and the absorption rate of 150 ml of artificial urine was measured and shown in Table 1.

Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Absorption rate 65 seconds 48 seconds 44 seconds 42 seconds 101 seconds 40 seconds

For the skin irritation tests of Examples 1 to 4 and Comparative Examples 1 and 2, an embossed nonwoven fabric sample was prepared and applied to the disposable absorbent product. Skin friction test was conducted to confirm the degree of skin irritation. The test was performed by applying a sample to a Finn chamber and rubbing it for 20 times. The skin was tested for skin irritation (skin irritation index) using the following formula (1) . The results are shown in Table 3 below.

[Criteria for Skin Irritation] reaction Score Symptoms and judging criteria - 0.0 No response +/- 0.5 Weak erythema + 1.0 Clear erythema ++ 2.0 Severe erythema with edema +++ 3.0 Severe erythema, blisters, edema

Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Skin irritation index 0.02 0.05 0.11 0.15 0.03 0.65 Skin irritation judgment no response no response no response no response no response Weak erythema

As shown in Table 3, skin irritation does not occur up to 70% of the opening ratio, but skin irritation of weak erythema occurs when the opening ratio exceeds 90%. Therefore, in order to protect the wearer's skin, it is preferable to configure the top sheet 6 so that the opening ratio is 70% or less.

The scope of the present invention is not limited to the embodiments described above, but may be defined by the scope of the claims, and those skilled in the art may make various modifications and alterations within the scope of the claims It is self-evident.

D: disposable diaper 1: front waist portion
2: crotch portion 3: rear waist portion
4: back sheet 5: absorbent core
6: upper sheet 7: absorbing diffusion layer
8: Inner padding band 9: Outer padding band
10: Tissue 11: Mouth band flap
12: peg band flap adhering part 13: peg band end
14: an adhesive band end bonding portion 15: an elastic band elastic body
16: Inner side flap of the pendant band 17: Outer side flap of the pendant band
18: re-sticking fastening means fixing portion 19: re-sticking fastening means
20: front fastening means 21: waist band
22: plastic film 23: nonwoven fabric

Claims (4)

A disposable absorbent article comprising an upper sheet in direct contact with a wearer ' s skin,
Wherein the upper sheet is composed of a single sheet having a plurality of convex embosses formed on its surface contacting the skin of the wearer, an opening is formed in the upper end of the convex emboss, and the upper sheet has an opening ratio of 0.1 to 70% And a ratio of the number of openings having a constant diameter). delete The method according to claim 1,
Wherein the basis weight of the top sheet is 15 to 70 g / m < 2 >. 4. The method according to any one of claims 1 to 3,
Wherein the top sheet is made of a plurality of staple fibers or continuous filament material.

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