KR102509763B1 - Absorbent article and method of manufacturing same - Google Patents

Abstract

The present invention provides a reusable absorbent article having excellent waterproofness and air permeability, suppressing backflow of liquid excretions and reducing pigment permeation, and a method for manufacturing the same, by manufacturing a cover layer of the absorbent article using a superhydrophobic coated nanomembrane. There is a purpose.

Description

Absorbent article and method of manufacturing same}

The present invention relates to an absorbent article and a method for manufacturing the same, and more particularly, to a reusable absorbent article that suppresses back flow, has excellent waterproofness and air permeability, and has little pigment permeation, and a method for manufacturing the same.

Absorbent articles include personal absorbent articles used to absorb water or bodily fluids such as sweat, urine, blood, and menstruation. Absorbent articles are convenient to use and are widely used, such as disposable diapers, sanitary napkins, panty liners, and incontinence pads.

Most absorbent articles consist of a cover layer that contacts the skin to pass liquid secretions, an absorbent layer that absorbs secretions, and a waterproof layer that prevents the absorbed secretions from leaking out.

At this time, the main purpose of the absorbent article is to prevent liquid from leaking to the outside while absorbing secretions. However, conventional absorbent articles have poor air permeability due to their characteristics, and the absorbent layer in contact with the skin becomes wet due to absorption of liquid secretions, which eventually causes various diseases (sores, dermatitis, discomfort, odor, etc.) as well as discomfort to the user. In particular, in the summer when the temperature is high, there is a problem in that the smell and unpleasant feeling are further increased.

In fact, according to the 'Preliminary Survey on Health Effects of Sanitary Pads' released by the Ministry of Environment, the disadvantages of disposable sanitary pads include symptoms such as burning sensation, soreness, dermatitis, odor, premenstrual syndrome (PMS), menstrual cycle change, and menstrual complexion change. It was investigated that the expression of Therefore, it is urgently needed to develop an absorbent article having good air permeability and not contaminating the cover layer by liquid secretions while maintaining the role of the existing absorbent article.

The prior art (Patent Document 1) relates to a sanitary napkin having a leak-proof structure, and discloses a sanitary napkin for preventing leakage of secretions such as menstrual blood.

However, the prior art focuses on the structural deformation of sanitary napkins, has problems in terms of wearing comfort and high manufacturing cost, and has problems in that air permeability is not improved at all due to the impermeability of the outer sheet.

That is, the problem of air permeability is not recognized at all other than the secretion does not leak out, so it is still not possible to prevent rashes caused by moisture or the propagation of bacteria and to solve the user's discomfort.

Republic of Korea Patent Publication No. 10-2005-0080166 (title of invention: sanitary napkin with leak-proof structure, publication date: 2005.08.11)

Accordingly, the present invention is to solve the problems of the prior art as described above, by forming a plurality of holes in the superhydrophobic coated nanomembrane to produce a cover layer of an absorbent article, which has excellent waterproofness and breathability, and by the superhydrophobicity of fibers It is an object of the present invention to provide a reusable absorbent article that suppresses backflow of liquid secretions and has little pigment permeation and a method for manufacturing the same.

The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the description below.

In order to solve the above problems, an absorbent article according to the present invention includes a cover layer for passing secretions, an absorbent layer for absorbing secretions transferred from the cover layer, and preventing secretions absorbed in the absorbent layer from leaking out. It includes a waterproof layer, the cover layer is made of a super-hydrophobic coated nano-membrane, and the cover layer is formed with a plurality of holes.

In addition, the nanomembrane may be prepared by electrospinning polyurethane.

In addition, the cover layer may have a contact angle of 150° or more with respect to water.

In addition, the waterproof layer may be formed of a super-hydrophobic coated nanomembrane.

In the method for manufacturing an absorbent article according to the present invention, in the method for manufacturing an absorbent article, a labeling step of preparing a labeling layer made of a nanomembrane, a labeling layer coating step of applying a superhydrophobic coating to the labeling layer, and the labeling and a hole forming step of forming a plurality of holes in the layer.

In addition, a waterproofing layer manufacturing step of manufacturing a waterproofing layer made of nano-membranes and a waterproofing layer coating step of applying a superhydrophobic coating to the waterproofing layer may be further included.

According to the absorbent article and the manufacturing method of the present invention, one or more of the following effects are provided.

First, by forming a plurality of holes in the superhydrophobic coated nanomembrane to prepare a labeling layer, air can pass between the nanopores of the nanomembrane, greatly improving breathability, and the surface of the labeling layer in contact with the skin is liquid secretion. Due to the superhydrophobicity of the cover layer, it does not get wet and always maintains a dry state, and liquid secretions absorbed into the absorption layer through a plurality of holes formed in the cover layer do not flow back again due to the superhydrophobicity of the cover layer.

Second, since the cover layer is not pigmented by liquid secretions, the absorbent article can be reused, thereby reducing resource waste.

Third, since the cover layer is prepared using a nanomembrane manufactured by laminating nanofibers produced by electrospinning polyurethane, the cover layer has excellent elasticity and durability, is harmless to the skin, and has a very thick thickness compared to other fibers. It is also thin and comfortable to wear.

Fourth, by manufacturing a waterproof layer using a superhydrophobic coated nanomembrane, there is an advantage in greatly improving air permeability of the absorbent article as well as reducing the thickness of the absorbent article and greatly improving wearing comfort.

Fifth, by using a superhydrophobic coated nanomembrane fiber with a plurality of holes as a cover layer, the surface of the cover layer in contact with the user's skin is always kept dry and can be used comfortably even in hot and humid weather. .

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is an exploded cross-sectional view schematically showing the structure of an absorbent article according to an embodiment of the present invention.
2 is a diagram schematically showing the structure of a cover layer according to an embodiment of the present invention.
3 is a view schematically showing the structure of a cover layer according to another embodiment of the present invention.
4 is a diagram schematically showing the structure of a cover layer according to another embodiment of the present invention.
5 is a flowchart of a method of manufacturing an absorbent article according to one embodiment of the present invention.
6 is a view showing the absorption layer of Example 1 and Comparative Example 1 of the present invention.
7 is a view for explaining the experimental method of Experimental Example 1 of the present invention.
8 is a view for explaining the experimental method of Experimental Example 1 of the present invention.
9 is a view for explaining the experimental method of Experimental Example 1 of the present invention.
10 is a view of measuring the thickness of Example 1 and Comparative Example 1 of the present invention.
11 is a view showing whether or not the pigment penetration of Example 1 and Comparative Example 1 of the present invention was tested.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to completely inform the person who has the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

Terms used in this specification are used to describe specific embodiments and are not intended to limit the present invention. As used herein, the singular form may include the plural form unless the context clearly indicates otherwise. In addition, when a certain part "includes" a certain component throughout this specification, it means that it may further include other components unless otherwise stated.

Hereinafter, the present invention will be described with reference to the drawings in order to explain an absorbent article and a manufacturing method thereof according to embodiments of the present invention.

1 is an exploded cross-sectional view schematically showing the structure of an absorbent article according to an embodiment of the present invention.

Referring to FIG. 1, an absorbent article according to an embodiment of the present invention includes a cover layer 100 for passing secretions, an absorbent layer 200 for absorbing secretions transferred from the cover layer 100, and the absorbent layer 200. ) and a waterproof layer 300 that prevents the secretion absorbed in the outside from leaking, and the cover layer 100 is made of a superhydrophobic coated nanomembrane and has a plurality of holes 110 formed.

2 is a diagram schematically showing the structure of a cover layer according to an embodiment of the present invention.

Referring to FIG. 2, the cover layer of a conventional absorbent article is a part in contact with the user's skin, and polyethylene or cotton has been mainly used. However, in manufacturing the cover layer 100 according to an embodiment of the present invention, polymer is A nanomembrane fabric manufactured by spinning is used.

Electrospinning is a fiber manufacturing method in which electric force is used to spray charged threads of a polymer solution or polymer melts up to a fiber diameter of the order of several hundred nanometers. That is, electrospinning can create very fine nanofibers from liquids or polymer solutions using electrical charges. That is, electrospinning can create very fine nanofibers from liquids or polymer solutions using electrical charges.

Nanomembranes made by stacking nanofibers formed by electrospinning polymers have three-dimensional pore spheres with a diameter of less than 1 μm and a laminated structure, and thus have excellent air permeability.

The electrospinning solution in which the polymer is dissolved is prepared by using an electrospinning device composed of a syringe pump, a high voltage power supply, and a spun fiber collector, and the distance between the spinning part and the laminated part is approximately Spaced about 10 to 30 cm apart, and with the applied voltage adjusted to 10 to 55 kV, the flow rate of the electrospinning solution was adjusted to 0.02 to 1.5 ml/min to electrospin under room temperature conditions to create nanofibers and laminate them to form nanomembranes. can be manufactured.

Polymers that are raw materials of the nanomembrane include polyurethane (PU), polyacrylonitrile (PAN), polyvinyl alcohol (PVA), nylon, polyvinylidene fluoride (PVDF), and polyhydroxybutyrate (PHB). ), polyethersulfone (PES), polyetherimide (PEI), polycaprolactone (PCL), polylactic acid (PLA), poly-L-lactic acid (PLLA), etc. may be used, but various polymer resins such as Polyurethane materials are preferred. Since polyurethane has a relatively small weight per unit area, it is preferable in that it can reduce the user's feeling of weight when wearing the absorbent article and increase adhesion to the skin.

In addition, as a solvent for dissolving the above polymer for electrospinning, DMA (dimethyl acetamide), DMF (N,Ndimethylformamide), NMP (N-methyl-2-pyrrolidinone), DMSO (dimethyl sulfoxide), THF (tetra- hydrofuran), DMAc (di-methylacetamide), EC (ethylene carbonate), DEC (diethyl carbonate), DMC (dimethyl carbonate), EMC (ethyl methyl carbonate), PC (propylene carbonate), water, acetic acid, formic acid (formic acid), chloroform, dichloromethane, acetone, ethanol, etc. may be used.

On the other hand, when a nanomembrane is fabricated by laminating nanofibers produced by electrospinning polyurethane, only air passes through nanopores formed in the nanomembrane, but liquid secretions such as water and blood cannot pass through. At this time, a superhydrophobic coating may be applied to the fabricated nanomembrane layer to further enhance waterproofness. The cover layer 100 made of a superhydrophobic coated nanomembrane has superhydrophobicity with a water contact angle of 150 degrees or more.

In addition, as shown in FIG. 2 , a plurality of holes 110 are formed in the cover layer 100 according to an embodiment of the present invention. By forming a plurality of holes 110 in the superhydrophobic coated nano-membrane cover layer 100, liquid secretion can pass through the plurality of holes 110 and be absorbed into the absorption layer 200. At this time, the diameter of each of the plurality of holes 110 and the distance between the holes 110 may be variously formed for each hole 110, and the diameter of the plurality of holes 110 is 1 mm or less, The distance between the holes 110 is preferably 3 mm or more.

3 and 4 are views schematically showing the structure of a cover layer according to another embodiment of the present invention.

Referring to FIG. 3 , a plurality of holes 110 may be patterned and formed in the cover layer 100 . As shown in FIGS. 3A to C, it is not limited to a specific shape and may be patterned and formed in various shapes such as a rhombus, a circle, and a rectangle.

Referring to FIG. 4 , the plurality of holes 110 may be formed in various patterns at the same time in one cover layer 100 and the intervals between the holes 110 may be variously formed. At this time, as the size of the hole 110 is smaller, the amount of backflow water is reduced, so the size of the hole 110 is smaller toward the center of the cover layer 100, which is a part that directly touches the skin than the outside of the cover layer 100. It is preferable to make

On the other hand, since the cover layer 100 according to an embodiment of the present invention is manufactured using a super-hydrophobic coated nanomembrane fabric, liquid secretions cannot pass through the nanopores formed in the nanomembrane, and only air can pass through, allowing breathability. This is very excellent, and the surface of the cover layer 100 in contact with the skin is super-hydrophobic coated so that it does not get wet due to liquid secretions and is absorbed into the absorbent layer 200 through the plurality of holes 110 formed in the cover layer 100. There is an advantage that the liquid secretion does not flow back due to the superhydrophobicity of the cover layer 100.

In addition, since the cover layer 100 according to an embodiment of the present invention is reusable by replacing only the absorbent layer 200 without pigment deposition due to liquid discharge, there is an advantage in reducing waste of resources.

In addition, since the nanomembrane manufactured by laminating nanofibers produced by electrospinning polyurethane is used, it has excellent elasticity and durability due to the physical properties of polyurethane, and is harmless to the skin. It is very thin and has excellent wearability as well.

The absorbent layer 200 of an absorbent article according to an embodiment of the present invention has high liquid absorbency, and may be, for example, nonwoven fabric, fabric, or a combination thereof.

The absorbent layer 200 may include natural fibers, artificial fibers, or a combination thereof. Examples of the natural fibers include cotton, hemp, wool, silk, asbestos fibers, paper fibers, and combinations thereof. Examples of the man-made fibers include i) regenerated fibers such as rayon, modal, tencel, lyocell, and polynosic; ii) semi-synthetic fibers such as acetate and triacetate; iii) Polyamides such as nylon, Nomex, and Kevlar, and polyolefins such as polyethylene and polypropylene. synthetic fibers such as polyesters such as polyethylene terephthalate, acrylics, poly(meth)acrylates, polyvinyl alcohol (PVA), polyurethane, polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), and polystyrene; And inorganic fibers such as glass fibers may be used, but are not limited thereto.

In addition, the waterproof layer 300 of the absorbent article according to an embodiment of the present invention may be formed of a superhydrophobic coated nanomembrane.

Existing absorbent articles used a waterproof layer 300 made of a non-woven fabric material to prevent liquid secretions absorbed in the absorbent layer 200 from leaking out, but the waterproof layer 300 according to an embodiment of the present invention has a super-hydrophobic coating. By manufacturing using a nanomembrane, the nanopores formed in the nanomembrane do not allow liquid secretions to pass through and only air can pass through, which greatly improves breathability and reduces the thickness of absorbent products because the nanomembrane is very thin compared to other fibers. Wear comfort can be greatly improved.

In addition, an adhesive may be applied to the outer surface of the waterproof layer 300, and in this case, there is an effect of easy attachment and detachment from underwear. When the adhesive is applied to the outer surface of the waterproof layer 300, in order to prevent the air permeability of the waterproof layer 300 from deteriorating due to the adhesive, the area where the adhesive is applied to the outer surface of the waterproof layer 300 is the outer surface of the waterproof layer 300. It is preferably 20% or more and 50% or less with respect to the total area. The adhesive is not particularly limited if it is an adhesive usable in the art to which the present invention belongs.

As described above, the absorbent article according to an embodiment of the present invention, unlike conventional absorbent articles, uses a plurality of holes 110 formed in a nanomembrane fabric coated with superhydrophobicity as the cover layer 100, so that the user's skin The surface of the cover layer 100 in contact with always maintains a dry state and can be used comfortably even in hot and humid weather.

An absorbent article according to an embodiment of the present invention can be applied to all absorbent articles such as disposable diapers, sanitary napkins, panty liners, and incontinence pads used to absorb body fluids such as water, sweat, urine, blood, and menstruation.

That is, by using as the cover layer 100 a plurality of holes 110 formed in a nanomembrane fabric coated with superhydrophobicity in the conventional disposable absorbent article, the skin-contacting surface of the conventional disposable absorbent article is always kept dry. It greatly improves waterproofness and air permeability, and it is possible to reuse it because there is no penetration of pigment.

Hereinafter, a method of manufacturing an absorbent article according to an embodiment of the present invention will be described with reference to FIG. 5 .

5 is a flowchart of a method of manufacturing an absorbent article according to one embodiment of the present invention.

The method shown in FIG. 5 is a method for making an absorbent article according to one embodiment of the present invention shown in FIG. 1 . Therefore, since the detailed description of the absorbent article manufactured by the method of manufacturing the absorbent article according to an embodiment of the present invention has been described above, the following will be omitted to avoid redundancy.

Referring to FIG. 5 , the method of manufacturing an absorbent article according to an embodiment of the present invention includes preparing a cover layer (S100), coating a cover layer (S200), and forming a hole (S300).

First, in the labeling layer preparation step (S100), a labeling layer made of nano-membranes is prepared. The nanomembrane is manufactured by laminating nanofibers produced by electrospinning polyurethane, and the size and shape of the cover layer manufactured using the nanomembrane may be variously manufactured according to the use of the absorbent article.

In the cover layer coating step (S200), a superhydrophobic coating is applied to the cover layer. The nanomembrane itself is already hydrophobic, but a superhydrophobic coating is applied to further increase the waterproofness. The surface of the surface in contact with the skin of the surface of the surface of the surface of the surface of the surface of the surface of the surface in contact with water has a contact angle of 150 degrees or more, which is made of a superhydrophobic coated nanomembrane, so that the surface can always be maintained in a dry state.

In the hole forming step (S300), a plurality of holes are formed in the cover layer. Since the surface of the superhydrophobic coated nanomembrane cover layer has superhydrophobicity, a plurality of holes are formed in the cover layer so that liquid secretions can pass through the plurality of holes and be absorbed into the absorption layer.

At this time, the diameter of each of the plurality of holes and the distance between the holes may be variously formed for each hole, and it is preferable that the diameter of the plurality of holes is 1 mm or less and the distance between the holes is 3 mm or more. .

In addition, as described above, a plurality of holes may be patterned and formed in various shapes such as a rhombus, a circle, a rectangle, etc. in the cover layer, and since the amount of water flowing backward decreases as the hole size decreases, the outer surface of the cover layer It is preferable to make the size of the hole smaller toward the center of the cover layer, which is the part that comes into direct contact with the skin.

Meanwhile, the manufacturing method of the absorbent article according to an embodiment of the present invention may further include a waterproofing layer manufacturing step and a waterproofing layer coating step.

In the waterproofing layer manufacturing step, a waterproofing layer made of a nanomembrane is manufactured. The nanomembrane is manufactured by laminating nanofibers produced by electrospinning polyurethane, and the size and shape of the waterproof layer manufactured using the nanomembrane may be variously manufactured according to the use of the absorbent article.

In the waterproofing layer coating step, a superhydrophobic coating is applied to the waterproofing layer. The nanomembrane itself is already hydrophobic, but a superhydrophobic coating is applied to further increase the waterproofness. The waterproof layer made of a nanomembrane coated with super-hydrophobic coating has a very high super-hydrophobicity with a water contact angle of 150 degrees or more, so even if a very large amount of liquid secretion is absorbed in the absorbent layer, it can prevent liquid secretion from leaking out of the absorbent article. there is.

In addition, the manufacturing method of the absorbent article according to an embodiment of the present invention may further include an adhesive application step.

In the adhesive application step, the adhesive can be applied to the outer surface of the waterproof layer, and in this case, there is an effect of easy detachability with underwear. In order to prevent deterioration in air permeability of the waterproof layer due to the adhesive when the adhesive is applied to the outer surface of the waterproof layer, the area to which the adhesive is applied to the outer surface of the waterproof layer is preferably 20% or more and 50% or less of the total area of the outer surface of the waterproof layer. do. The adhesive is not particularly limited if it is an adhesive usable in the art to which the present invention belongs.

Finally, an absorbent article may be manufactured by combining the separately prepared absorbent layer and waterproof layer with the prepared cover layer.

Hereinafter, preferred embodiments are presented to aid understanding of the present invention, but the following examples are merely illustrative of the present invention, and it is obvious to those skilled in the art that various changes and modifications are possible within the scope and spirit of the present invention. However, it is natural that such variations and modifications fall within the scope of the appended claims.

<Example 1>

6 is a view showing the absorption layer of Example 1 and Comparative Example 3 of the present invention.

As shown in FIG. 6, a cover layer using a superhydrophobic coated nano-membrane fabric having a diameter of 40 mm was placed in the center of the absorber layer having a size of 50 mm * 70 mm. In the cover layer of Example 1, a plurality of holes were formed with a diameter of 1 mm and a distance between holes of 3 mm, maintaining constant intervals.

<Comparative Example 1>

A cover layer of a commercially available general pad was separated and placed on the center of the same absorbent layer as that used in Example 1.

<Comparative Example 2>

The same absorption layer and cover layer as those used in Example 1 were used, and the diameter of a plurality of holes formed in the cover layer was changed to 2 mm.

<Comparative Example 3>

The same absorption layer and cover layer as those used in Example 1 were used, and the diameter of a plurality of holes formed in the cover layer was changed to 3 mm.

Hereinafter, Experimental Examples 1 and 2 performed to evaluate the performance of Example 1 and Comparative Examples 1 to 3 will be described with reference to FIGS. 7 to 9 .

7 to 9 are views for explaining the experimental methods of Experimental Examples 1 and 2 of the present invention.

7, in Experimental Example 1, 10 ml of water was poured into Example 1 and Comparative Example 1 to measure the absorption time of Example 1 and Comparative Example 1, and in Experimental Example 2, Example 1 and Comparative Example 2, 3 was poured with 10 ml of water, and the absorption time of Example 1 and Comparative Examples 2 and 3 was measured.

For more accurate measurement, a cylinder was installed near the edge of the cover layer in Example 1 and Comparative Examples 1 to 3 to prevent water from leaking out of the cover layer. In the method of measuring the absorption time, after pouring 10 ml of water into a beaker, the time from the moment the water touches the cover layer until the water is absorbed was measured as the absorption time. The reason for pouring water into a beaker is that a beaker is used to pour a large amount quickly.

Referring to FIG. 8, in a state in which the tissue paper is in contact with the surface of the cover layer of Example 1 and Comparative Examples 1 to 3, which has absorbed water, the tissue paper is moved from side to side so that the water can be smeared, and then the tissue paper is soaked with water. The amount of water stained on the surface of the cover layer was measured by subtracting the original weight of tissue paper from the weight.

Referring to FIG. 9, after putting tissue paper on the surface of the cover layer of Example 1 and Comparative Examples 1 to 3 that absorbed water, a constant force of 6.0372 N and a constant pressure of 1.201 kPa was used as a cylinder to prevent water leakage. Example 1 and Comparative Examples 1 to 3 were pressed. Thereafter, the amount of water flowing backward on the surface of Example 1 and Comparative Examples 1 to 3 was measured using tissue paper in the same way as the method of measuring the amount of water stained.

First, the absorption time, smeared amount, and regurgitated amount of Example 1 and Comparative Example 1 measured in Experimental Example 1 are summarized in Table 1 below.

Example 1 Comparative Example 1 absorption time 1s 1s spilled sheep 0.0142g 0.0221g amount of regurgitation 0.1517g 0.2291g

Referring to Table 1, the time until the water of Example 1 and Comparative Example 1 is completely absorbed is the same as about 1 s, and the amount of water in Example 1 is reduced by about 35% compared to Comparative Example 1, It was also found that the amount was reduced by about 34%. As such, Example 1 was found to have significantly better performance than Comparative Example 1 as both the amount of smear and the amount of backflow decreased compared to Comparative Example 1.

Next, the absorption time, smeared amount, and regurgitated amount of Example 1 and Comparative Examples 2 and 3 measured in Experimental Example 2 are summarized in Table 2 below.

Example 1 Comparative Example 2 Comparative Example 3 absorption time 1s 1s 1s spilled sheep 0.0124g 0.0131g 0.0271g amount of regurgitation 0.1517g 0.2279g 0.4294g

Referring to Table 2, the time until the water of Example 1 and Comparative Examples 2 and 3 is completely absorbed is the same as about 1 s, and the amount of spilled and reversed water is significantly reduced compared to Comparative Examples 2 and 3. Could know. As such, it was found that Example 1 performed significantly better than Comparative Examples 2 and 3, as both the smeared amount and the refluxed amount of Example 1 were significantly reduced compared to Comparative Example 2.

10 is a view of measuring the thickness of Example 1 and Comparative Example 1 of the present invention.

Meanwhile, as shown in FIG. 10, the thickness of the cover layer of Example 1 and Comparative Example 1 was measured. As shown in Figure 10a, the thickness of the cover layer of Comparative Example 1 was measured as 0.37mm, whereas as shown in Figure 10b, the thickness of the cover layer of Example 1 using the nanomembrane fabric was 0.05mm, and the nanomembrane fabric It was found that the thickness of the cover layer using the was reduced by about 86% compared to the thickness of the cover layer of the general pad. Through this, it is possible to manufacture a cover layer having a thinner thickness with better performance using the nanomembrane fabric, so that the user can feel much better wearing comfort when wearing the absorbent product.

11 is a view showing whether or not the pigment penetration of Example 1 and Comparative Example 1 of the present invention was tested.

In addition, as shown in FIG. 11, an experiment was conducted to determine whether the color penetration of the cover layer of Example 1 and Comparative Example 1 was performed.

To this end, a red liquid similar to blood was dropped on the surfaces of Example 1 and Comparative Example 1, and then the cover layer was separated to confirm whether pigment had penetrated into the cover layer.

As shown in FIG. 11A, it can be seen that the cover layer of Comparative Example 1 is stained with dye, but referring to FIG. 11B, in Example 1, the red liquid passes through a plurality of holes formed in Example 1. It was absorbed into the absorption layer, and it was found that the cover layer of Example 1 did not penetrate the dye at all.

That is, it was confirmed that the label layer using the superhydrophobic coated nanomembrane did not cause pigmentation due to liquid excretions, and thus the absorbent article could be reused.

As described above, an experiment comparing Example 1 in which a plurality of holes are formed in a superhydrophobic coated nanomembrane fabric as a cover layer and Comparative Example 1 using a commercially available cover layer made of a general non-woven fabric material with each other they proceeded. Through the above experiments, Example 1 has the same absorption time as Comparative Example 1, and at the same time, the amount smeared and the amount regurgitated after absorption of the liquid is much smaller, so that the user can always feel comfortable when wearing it, and it has a much thinner thickness, so it is comfortable to wear. It was found that Example 1 has a remarkably superior effect than Comparative Example 1 in that it can be greatly improved and reuse is also possible due to the superhydrophobic nature of the fiber, which does not allow dye penetration.

In addition, through Experimental Example 2, it was found that Example 1, in which a hole having a diameter of 1 mm was formed, had the same absorption time as Comparative Examples 2 and 3 having a diameter of 2 mm and 3 mm, respectively, while the amount of liquid absorbed and the amount of backflow were much smaller. could Therefore, in the present invention, when forming a plurality of holes in the cover layer, the diameter of the holes is formed to be 1 mm or less, so that the absorption time is the same and the amount of smear and reverse flow can be greatly reduced.

Although the preferred embodiments of the present invention have been illustrated and described with reference to the drawings as described above, the present invention is not limited to the specific embodiments described above, and the subject matter without departing from the subject matter of the present invention claimed in the claims. Of course, various modifications and implementations are possible by those skilled in the art to which the invention belongs, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

100: cover layer
110: hall
200: absorption layer
300: waterproof layer
S100: cover layer manufacturing step
S200: cover layer coating step
S300: hole forming step

Claims (6)

A cover layer that allows secretions to pass through;
an absorbent layer for absorbing secretions transferred from the cover layer; and
And a waterproof layer that prevents secretions absorbed in the absorbent layer from leaking to the outside,
The cover layer is made of a superhydrophobic coated nanomembrane,
The cover layer is
A plurality of holes are formed in plurality in an elliptical pattern having a predetermined interval,
The elliptical pattern decreases in size toward the center of the cover layer, and the size of the plurality of holes forming the elliptical pattern also decreases,
The absorbent article according to claim 1 , wherein the plurality of holes are formed in a rectangular pattern with regular intervals at both ends of the cover layer, and the plurality of holes forming the rectangular pattern are manufactured to have the same size. According to claim 1,
The absorbent article according to claim 1, wherein the nanomembrane is produced by electrospinning polyurethane. According to claim 1,
The absorbent article, characterized in that the cover layer has a contact angle with respect to water of 150 ° or more. According to claim 1,
The absorbent article, characterized in that the waterproof layer is made of a super-hydrophobic coated nanomembrane. A method of manufacturing an absorbent article comprising:
A cover layer preparation step of preparing a cover layer made of a nanomembrane;
A cover layer coating step of applying a super-hydrophobic coating to the cover layer; and
A method for manufacturing an absorbent article including a hole forming step of forming a plurality of holes in the cover layer in an elliptical pattern at regular intervals, and making the size of the elliptical pattern and the plurality of holes smaller toward the center of the cover layer. . According to claim 5,
A waterproofing layer manufacturing step of manufacturing a waterproofing layer made of a nanomembrane; and
The method of manufacturing an absorbent article further comprising a waterproof layer coating step of applying a super-hydrophobic coating to the waterproof layer.

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