KR101760825B1 - Insert-typed absorber formed safety-hole and manufacturing method thereof - Google Patents

Abstract

The present invention relates to an insertion type body having a safety hole for preventing a body fluid from leaking out of the body by forming a hole in a shape of a column, The present invention relates to an absorbent body for a sanitary napkin and a method of manufacturing the same, and it is possible to prevent the problem that a part of the body fluid leaks out of the body when a large amount of body fluid is generated within a short period of time, In addition, since the absorbed body fluids are rapidly absorbed due to the improved absorption rate, the user can prevent the body fluids from being generated or feel the body fluids staying in the body. Thus, the fit of the sanitary napkin can be improved, It may reduce the concern that the body fluid leaks out of the body.

Description

[0001] The present invention relates to an absorbent body for an insertion type sanitary napkin having a safety hole and a manufacturing method thereof,

The present invention relates to an insertion type body having a safety hole for preventing a body fluid from leaking out of the body by improving the absorption rate of the body fluid by forming holes in the form of a column, Absorbent body for a sanitary napkin and a method of manufacturing the same.

There are two types of commonly used feminine hygiene tampons, one of which is a finger tampon, which is an absorbent structure designed to be inserted directly into the body cavity, such as a woman's vagina, ). In the case of the applicator, the tampon is made of a cardboard or a polymer resin.

The two types of tampons can be fabricated in an elongated shape called 'softwind', folding the strip of loosely coupled absorber and shaping the soft wind in a radially rounded shape, For example, it may be formed by folding in the shape of 'W', 'V' or cup, and then compressing it in two axes to produce a pledget.

In the case of these two types of tampons, the tampon can be easily removed from the user's body after the body fluid such as the user's menses is absorbed by attaching the tampon before and after compression. For example, By pulling the string, the used tampon was removed.

However, in the case of the above-mentioned tampon, since the tampon is inserted into the body and absorbs the body fluid, the body fluid absorbs a larger amount of body fluid than the tampon can absorb, or the tampon is not sufficiently attached to the body, , The rate of absorption of the tampon does not reach the rate of the secreted body fluid, which may cause the body fluid to leak out of the body.

In order to solve such a problem, in order to prevent the leakage of body fluid from the body, such as absorbing the body fluid in the tampon, the body absorbs body fluids, .

Patent No. 10-0460253 discloses a tampon that expands laterally in the body after insertion into the body to reduce the leakage of body fluids when using the tampons. In order to reduce leakage of body fluids, , A sanitary tampon having an M-shaped contour is proposed.

However, in the case of such a conventional tampon, the tampon is in close contact with the inside of the body, resulting in a reduced feeling of wearing due to a foreign body feeling. Further, the body tampon is expanded to the side to form a 'Y' . ≪ / RTI >

Registration No. 10-0460253 (Registered on December 8, 2004)

Disclosed is a sanitary napkin for solving the problem that when a large amount of body fluid is generated in a short period of time when using the sanitary napkin of the present invention, the absorbent body can not completely absorb the body fluid and part of the body fluid leaks out of the body. (Hereinafter, referred to as a safety hole) formed in a bottom surface of an absorbent body, thereby providing a safety hole capable of remarkably improving the rate of absorption of body fluids, and a method of manufacturing the same.

In order to achieve the above-mentioned object, an embodiment of the present invention is a columnar absorber formed by winding a nonwoven fabric (110) having a longer width (W) than a length (L) A hole 115 is formed in a bottom surface of the absorber and the hole 115 is formed in a recessed shape so that the diameter of the hole gradually decreases toward the other bottom surface of the absorber, Of the total length L of the nonwoven fabric 110. The nonwoven fabric 110 is formed such that the liquid permeable layer 113 containing the hydrophobic fibers and the absorbent layer 111 containing the water absorbent fiber include natural adhesives and superabsorbent resins Wherein the natural adhesive is at least one selected from the group consisting of Dacrose root liquor, starch paste, corn starch, potato starch, sweet potato starch and tapioca starch. Is an insertion type sanitary napkin absorbent having a safety hole for use.

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According to another embodiment of the present invention, a nonwoven fabric 110 having a longer width W than the length L is formed by winding the nonwoven fabric 110 in the width direction to form an absorber. And a step of forming a depression on the bottom surface of the absorbent body by applying a pressure using a pressing member (50) so that the diameter of the hole gradually decreases toward the other bottom surface of the absorbent body, Can be produced.

The nonwoven fabric 110 having a longer width W than the length L is obtained by forming the absorbent layer 111 including the liquid permeable layer 113 including hydrophobic fibers and the absorbent layer 111 through water punching, ; Fabricating the nonwoven fabric 110 by dewatering or drying the fibrous web; And cutting the produced nonwoven fabric 110 into a predetermined shape such that the width W is longer than the length L.
The step of integrating the liquid-permeable layer and the absorbent layer together with the single fiber web may include the steps of: superimposing the liquid-permeable layer and the absorbent layer on the liquid-permeable layer and the absorbent layer; Injection stage; And a second jetting step of jetting a jet stream of 10 to 100 bar pressure so that the natural adhesive of the liquid-permeable layer and the absorbent layer passing through the first jetting step is removed and the superabsorbent resin particles penetrate the absorbent layer deeper; Wherein the depth of the hole is 9 to 21% of the total length L of the absorbent body, and the natural adhesive is at least one selected from the group consisting of Dacs grass root solution, starch paste, corn starch, potato starch and tapioca starch Or more can be used.

The step of fabricating the absorber may include removing means 20 in the form of wrapping the nonwoven fabric in the longitudinal direction on one side of the nonwoven fabric 110 having a longer width than the length, And a part of the removing means 20 may be exposed on the other bottom surface of the absorbent body.

And compressing the absorber in the radial direction after the step of manufacturing the absorber.

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The present invention relates to a pillar-shaped absorber which is inserted into a body and absorbs body fluids and forms a hole in a form of a depression on the underside of the pillar, thereby achieving a remarkable improvement in the absorption rate, It is possible to prevent a part of the body fluids from leaking out of the body when the body fluid is generated.

In addition, since the absorbed body fluids are rapidly absorbed due to the improved absorption rate, the user can prevent the body fluids from being generated or feel the body fluids staying in the body. Thus, the fit of the sanitary napkin can be improved, It may reduce the concern that the body fluid leaks out of the body.

1 is a schematic view schematically showing an absorbent body for an insertion type sanitary napkin having a safety hole according to the present invention.
2 is a schematic view schematically showing a manufacturing process of an absorbent body for an insertion type sanitary napkin having a safety hole according to the present invention.
3 to 5 are schematic views schematically showing various embodiments of a nonwoven fabric of an absorbent article for an insertion type sanitary napkin having a safety hole according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. As well as the fact that

Throughout this specification, when an element is referred to as "including" an element, it is understood that it may include other elements as well, without departing from the other elements unless specifically stated otherwise.

Throughout this specification, when a member is located on another member "above ", this includes not only when a member is in contact with another member but also when there is another member between the two members.

Hereinafter, an absorbent body for an insertion type sanitary napkin having a safety hole according to the present invention and a method for manufacturing the same will be described in detail.

First, as shown in FIG. 1, an absorbent body 100 for an insertion type sanitary napkin having a safety hole according to an embodiment of the present invention comprises a nonwoven fabric 110 having a longer width W than a length L, In the absorber, a hole 115 may be formed in a bottom surface of the absorber in a recessed shape.

As a result, in the case of the insertion type sanitary napkin 100 having the safety hole according to the present invention, the absorption capacity of the absorbent body 100 is equal to or greater than that of the columnar type absorber in which no holes are formed, By significantly improving it, it is possible not only to prevent the body fluid from leaking out of the body, but also to improve the fit of the user.

Preferably, in the case of the absorbent body for an insertion type sanitary napkin having the safety hole according to the present invention, a part of the removing means 20 may be exposed on the other bottom surface of the absorbent body in order to easily remove the sanitary napkin after use, Preferably, the removing means 20 is formed in a longitudinal direction to cover the nonwoven fabric 110 having a longer width than the length, and when the insertion type sanitary napkin is inserted, in use; Or when the removal means is pulled out after the use is completed; It is possible to prevent the removing means from being separated from the absorber.

Specifically, in the case of the insertion type sanitary napkin having the safety hole according to the present invention, a hole 115 may be formed in a bottom surface of the columnar absorbent body, and the hole 115 may be formed in the other bottom surface of the absorbent body And the depth of the hole is preferably 9 to 21% of the length of the entire absorbent body.

If the depth of the hole is thinner than 9% of the total length of the absorber, the effect of improving the absorption rate is insignificant and there is no benefit of hole formation, resulting in a reduction in economy. If the hole is deeper than 21% of the total length of the absorber, The length of the inner side is reduced, and a phenomenon in which the body fluid leaks out of the body occurs, or the absorption capacity to be absorbed by the absorber may be lowered.

It is preferable that the hole 115 is recessed so that the diameter of the hole gradually decreases toward the other bottom surface of the absorber. If the shape of the hole is formed into a cylindrical shape having a constant diameter of the hole, The effect is insignificant and the depth of the middle part of the absorber is lowered, so that the absorption capacity may be lowered.

The absorbent body for an insertion type sanitary napkin having a safety hole according to the present invention is not limited as long as it is not toxic when it comes into contact with the body and can absorb body fluids without causing skin troubles or body side effects, A nonwoven fabric made of synthetic fibers, natural fibers or mixed fibers (synthetic fibers + natural fibers) can be used.

Specifically, the nonwoven fabric may have a structure in which a liquid permeable layer and an absorbent layer are laminated. For example, the liquid permeable layer and the absorbent layer may be separated from each other (FIG. 3) 5).

3, the flat liquid absorbent layer 121 and the flat liquid absorbent layer 123 are separated from each other when the liquid permeable layer and the absorbent layer are separated from each other, The flat absorber 120 may be used as a nonwoven fabric after the liquid-permeable layer 123 is wrapped around the flat absorptive layer 121, and the liquid-permeable layer and the absorber layer may be integrally formed as shown in FIG. 4 or FIG. The nonwoven fabric may be formed by integrating the liquid-permeable layer 113 containing the hydrophobic fibers and the absorbent layer 111 including the absorbent fiber.

Preferably, in order to increase the tensile strength relative to the weight of the absorbent body and to prevent the liquid permeable layer and the absorbent layer from separating from each other or remaining the absorber in the body when the absorbent body for the sanitary napkin during use or use is removed from the body, In the present invention, a nonwoven fabric 110 in which the liquid-permeable layer and the absorbent layer are integrated as shown in FIG. 4 or FIG. 5 can be used. In the case of the integrated nonwoven fabric 110, You can use a layer that does not require any additional layers to wrap or protect the outside.

More specifically, the liquid-permeable layer 113 having hydrophobic properties and the absorbent layer 111 having hydrophilic properties are integrally formed by laminating together a body fluid, and the liquid-permeable layer 113 To be absorbed into the absorbing layer 111. [

The liquid-permeable layer 113 may be formed of a fiber in which one or more fibers selected from the group consisting of natural fibers, regenerated fibers and synthetic fibers are hydrophobically treated; Or hydrophobic fibers selected from at least one or more selected from the group consisting of polyester, polypropylene and polyethylene terephthalate.

The hydrophobically-treated fiber may be one in which one or more fibers selected from the group consisting of natural fibers, regenerated fibers and synthetic fibers have been subjected to hydrophobic treatment by various methods. However, in one embodiment, a dispersion containing a hydrophobic lubricant is added to the fiber surface A hydrophobic treated fiber prepared by heating and fixing a hydrophobic lubricant on the surface of the fiber and then drying the heat-set fiber may be used.

Wherein the dispersion may comprise 30 to 70 wt% of a hydrophobic lubricant comprising a fatty acid amide condensation product based on 100 wt% of the dispersion. The fatty acid amide condensate may be a fatty acid amide condensation product based on a carbon atom of mono or dian and a fatty acid chain (C10 to C25), which imparts friction and hydrophobicity to the fiber. The hydrophobic lubricant contained in the dispersion may have an average particle size of 0.1 to 3 占 퐉 for uniform hydrophobic treatment.

In addition, the dispersion may contain 10 to 50 wt% of a cationic antistatic agent of quaternary ammonium salt based on 100 wt% of the dispersion so as to minimize the generation of static electricity during carding, and the cationic antistatic agent may be a partial It is possible to minimize the repulsion of the hydroxy or carboxy group and the antistatic agent present according to the oxidation.

If the amount of the cationic antistatic agent is too small, it is difficult to form the fibrous web due to the generation of static electricity during the carding operation. On the other hand, if the content of the cationic antistatic agent is too high, Lt; / RTI > In addition, the cationic antistatic agent may be one having a relatively high pH to minimize acid-induced inflammation, and preferably a cationic antistatic agent having a pH of 5 to 6 may be used.

Generally, in the case of hydrophobic fibers, there is a high possibility that the fabrication normal trouble such as curling of the nonwoven fabric and poor uniformity is caused by strong friction in the carding process. Particularly, due to the rapid production speed of the manufacturing process, It is true. In order to solve this problem, when the content of the antistatic agent in the dispersion for producing the nonwoven fabric is increased, the process trouble is alleviated, but the hydrophobicity of the resultant nonwoven fabric may be lowered. Therefore, Barium titanate, which is an inorganic substance having a high dielectric constant, may be further added in order to reduce troubles on the substrate.

Accordingly, in order to improve the workability of the non-woven fabric manufacturing process, the dispersion may further contain 1 to 5 wt% of barium titanate based on 100 wt% of the dispersion. In addition, based on the weight of the composition, 0.1 to 3 wt% of polydimethylsiloxane. Further, if necessary, an active ingredient such as a commercially available emulsifier, a coagulating agent and the like may be further contained in the dispersion.

In addition, the liquid-permeable layer 113 may include a hydrophobic fiber selected from the group consisting of polyester, polypropylene, and polyethylene terephthalate in addition to the hydrophobic treated fiber as described above. For example, spur lace, air through, point bond, spun bond, thermal bond nonwoven fabric, or porous plastic sheet formed of the above hydrophobic fibers can be used as a liquid permeable layer.

The absorbent layer 111 serves to absorb moisture. The absorbent layer 111 is not particularly limited and can be used as an absorbent layer. Preferably, the absorbent layer 111 is made of cotton fiber, rayon fiber, tencel fiber, acrylic fiber, Polyester fibers, and polyester fibers.

In the present invention, it is preferable to use a nonwoven fabric 110 in which a liquid-permeable layer 113 and an absorbent layer 111 are integrated with a nonwoven fabric when the absorber is molded, and a preferred form of the integrated nonwoven fabric 100 is a liquid- 5) in which the absorbent layer 111 is formed between the first liquid-permeable layer 113a and the second liquid-permeable layer 113b (FIG. 4) Lt; / RTI >

In addition, it is preferable that the surface of the integrated nonwoven fabric 110 is formed in a concavo-convex structure, because the surface area of the nonwoven fabric is increased due to the concavo-convex structure, and the absorption rate of the body fluid having a high viscosity is further increased .

When the nonwoven fabric 110 is formed by laminating one surface of the liquid-permeable layer 113 and one side of the absorbent layer 111 as an absorber, when the nonwoven fabric is formed by being rolled in the width direction, And the liquid permeable layer 113 is formed so as to form the outer side surface of the absorbent body.

Preferably, after using the absorbent body for an insertion type sanitary napkin having the safety hole of the present invention, a removing means is provided in the form of wrapping the nonwoven fabric in the longitudinal direction so as to facilitate removal from the body, It can be exposed to the other bottom surface of the absorber in the form of a column.

Specifically, the removing means 20 is used when the absorbent body for an insertion type sanitary napkin having the safety hole according to the present invention is inserted into the body, sufficiently absorbs the body fluids, and then removes the absorbent body from the body, A part of which is turned in the width direction and is exposed to the other bottom surface of the molded absorbent body, and the removal means is exposed to a bottom surface opposite to a bottom surface in which the hole is formed through the pressing member 50 .

In general, a string is used as the removing means 20. Specifically, both ends of the string are all turned to one side of the nonwoven fabric, that is, a columnar shape, and exposed to the other underside of the absorber formed in a columnar shape, Thereby facilitating removal of the inserted absorber.

In addition, the both ends of the string may be bundled so that the exposed string is bundled so that the nonwoven fabric is fitted in the width direction, and a part of the string, which is the bundled form, As shown in FIG.

It is preferable that the removing means 20 is located at the center of the other undersurface of the molded columnar absorber. For this purpose, when the absorber is formed into a columnar shape, the removing means 20 is positioned on one side in the width direction of the nonwoven fabric The non-woven fabric having the removing means 20 formed thereon is turned in the width direction so that one side of the non-woven fabric is inside.

Although the removing means 20 has been described in detail with a string as an example, it is also possible to use a sheet shape as the removing means, or to provide a separate means. Further, the removing means does not limit the material thereof, A non-absorbent material may be used for convenience of use, or a water-repellent surface may be used in case of an absorbent material.

2, the non-woven fabric 110 having a longer width W than the length L may be formed in a width direction of the absorbent body for the sanitary napkin, Shaping it into a columnar shape to produce an absorber; And a step of applying pressure to a bottom surface of the absorbent body by using a pressure member to form a recessed shape such that the diameter of the hole gradually decreases toward the other bottom surface of the absorbent body, An absorber for use can be produced.

Preferably, in the case of the absorbent body of the insertion type sanitary napkin having the safety hole of the present invention, as shown in Fig. 3, the flat absorbent body 120 in which the flat liquid absorbent layer and the flat liquid absorbent layer are separated from each other, The nonwoven fabric 110 is wound in the width direction to form an absorbent body in the form of a column to manufacture an absorbent body for an insertion type sanitary napkin having the safety hole formed therein.

The integrated nonwoven fabric 110 as shown in FIG. 4 or 5 can be used so that the absorbent body can have a superior absorbing capacity equal to or higher than that of the flat absorber while reducing the total weight of the absorbent body.

For example, the integrated nonwoven fabric 110 may be formed by integrating a liquid-permeable layer 113 including hydrophobic fibers and an absorbent layer 111 including absorbent fibers into a single fibrous web through water punching; Dewatering or drying the fibrous web to produce a nonwoven fabric; And cutting the produced nonwoven fabric 110 into a predetermined shape such that the nonwoven fabric 110 has a longer width direction than the lengthwise direction.

Specifically, the integrating step is a step for integrating the absorbent layer 111 including the liquid-permeable layer 113 including hydrophobic fibers and the absorbent fiber into a single fibrous web, (FIG. 4) in which the absorbent layer is laminated on one side of the layer (FIG. 4) or the absorbent layer is formed between the first liquid-permeable layer and the second liquid-permeable layer (FIG. 5).

The liquid-permeable layer 113 and the absorbent layer 111 are not described here because they have been described above. As described above, it is preferable to use a water punching method instead of the synthetic resin adhesive to integrate the liquid-permeable layer 113 and the absorbent layer 111 to produce a single fiber web.

The water punching method is a method in which high-pressure water is continuously passed through the fiber to increase the density of the fiber and the bonding force between the fibers, and the number and strength of the water punching are adjusted so as to match the stiffness required for the laminate. Can be adjusted appropriately.

Preferably, the step of integrating the liquid-permeable layer 113 and the absorbing layer 111 is performed by stacking the liquid-permeable layer 113 and the absorbent layer 111 in order to stably bond the liquid-permeable layer 113 and the absorbent layer 111, And a first jetting step of jetting a jet stream containing a natural adhesive to the absorbing layer (111) at a pressure of 10 to 150 bar; And a second jetting step of jetting jet streams of 10 to 100 bar pressure through the liquid-permeable layer and the absorbent layer which have passed through the first jetting step.

Specifically, in the first injection step, a jet stream containing 0.05 to 5 wt% of a natural adhesive may be injected at a pressure of 10 to 150 bar to bond the liquid-permeable layer and the absorbent layer having different physical properties to each other.

At this time, the binding between the liquid permeable layer and the absorbent layer can be smoothly and intensively performed through the jet stream containing the natural adhesive. The natural adhesive generally has no toxicity and trouble occurrence in the human body, But it is preferably at least one selected from the group consisting of dough grass root solution, starch paste boiled in starch powder, corn starch, potato starch, sweet potato starch, or tapioca starch. At least one can be used as a natural adhesive.

Further, in order to improve the absorption performance of the fibrous web formed by combining the liquid-permeable layer 113 and the absorbent layer 111, it is possible to further include superabsorbent resin particles in the jet stream of the first injection stage.

The size of the superabsorbent resin particles can be a resin surface having a high absorbency characteristic capable of absorbing moisture, particularly a liquid having a high viscosity. Particularly, the size of the superabsorbent resin particle is smaller than the pore size of the liquid permeable layer and larger than the pore size of the absorbent layer .

For example, the superabsorbent resin may be prepared by preparing a hydrogel polymer prepared by polymerizing a neutralized water-soluble ethylenically unsaturated monomer with a compound containing an acidic group in a molecular structure, drying, pulverizing and classifying it to obtain a base resin, A cross-linked polymer prepared by crosslinking the base resin particles with a diol or a glycol compound having 2 to 8 carbon atoms is pulverized to obtain a superabsorbent resin having a particle size smaller than the pore size of the liquid permeable layer and larger than the pore size of the absorbent layer Can be produced.

The liquid-permeable layer 113 and the absorbent layer 111 having passed through the first jetting step are jetted with a jet stream at a pressure of 10 to 100 bar, and the liquid-permeable layer and the absorbent layer are integrated into a single fiber web .

The natural adhesive remaining in the liquid permeable layer and the absorbent layer through the second injection step is removed, and the superabsorbent resin particles remain in the absorbent layer, so that the absorbent property improving effect inherent in the function can be exhibited.

As described above, the integrated nonwoven fabric 110 is formed by dewatering or drying a fiber web integrated through water punching of the liquid-permeable layer 113 having different physical properties and the absorbent layer 111 through the step of integrating As a result, the manufacturing process of the nonwoven fabric, which is a basic material for forming the absorber, can be simplified, thereby reducing the manufacturing cost and improving the economical efficiency.

In addition, an absorbent article for an insertion type sanitary napkin is disclosed in which the liquid permeable layer and the absorbent layer are combined with each other only by a water punching process without using a separate strong synthetic adhesive to form a single fibrous web and then inserted into the body using a nonwoven fabric manufactured using the fibrous web. It is possible to prevent troubles in the body from occurring when the absorbent body is inserted into the body and also to prevent the problem that the tensile strength in the nonwoven fabric is increased to partially damage the absorbent body when it is removed after use and remain in the body.

The non-woven fabric 110 is manufactured through the step of dehydrating and drying the absorbent web prepared through the step of integrating to produce a nonwoven fabric, and then cutting the nonwoven fabric 110 into a predetermined shape so as to have a longer width direction than the longitudinal direction An integrated nonwoven fabric can be produced.

The nonwoven fabric (110) cut in a predetermined shape having a longer width than the length through the cutting step has a removing means in the form of wrapping the nonwoven fabric in the longitudinal direction on one side, and the one side It is possible to manufacture the absorber through the step of forming the absorber by molding it in a columnar shape by turning it in the width direction so as to be formed inward.

The step of fabricating the absorber may include a step of removing the nonwoven fabric 110 in a lengthwise direction longer than the length of the nonwoven fabric 110, The absorbent body can be formed into a columnar shape by rolling in the width direction so that one side is formed inward, thereby manufacturing the absorbent body.

At this time, it is preferable that a part of the removing means 20 is exposed to the underside of the absorber, that is, the underside of the underside where the depressed holes are formed.

And compressing the absorbent in the radial direction after the step of manufacturing the absorbent body. This is to increase the absorption rate of the body fluid per unit volume by compressing the formed nonwoven fabric.

Preferably, in the compressing step, the absorber is compressed in the radial direction of the absorber, and the shape of the absorber in the form of a column is changed into a cylindrical shape, a polygonal column (triangular column, square column, hexagonal column, octagonal column, etc.) But it may be compressed into a cylindrical shape to improve the insertion convenience of the user when inserted, and more preferably, the circumference of the absorbent body may be compressed to 10 to 12 mm.

In addition, when the molded nonwoven fabric is compressed in the longitudinal direction by compressing the molded nonwoven fabric in the radial direction, the length of the absorbent body is increased when the molded nonwoven fabric is absorbed in the longitudinal direction, so that the user feels a foreign body feeling and can cause inconvenience and pain In addition, the present invention is intended to prevent a phenomenon that a part of the body fluid leaks out of the body because the absorber is not closely attached to the body, or a phenomenon that the inserted absorber falls out of the body occurs.

Preferably, when the columnar absorber is pressed in the compressing step, moisture can be applied to compress the columnar absorber. This can prevent the fibers from returning to their original volume after compression by inducing hydrogen bonding between the fibers in the nonwoven fabric constituting the absorber , When a user inserts an absorbent body for an insertion type sanitary napkin having a safety hole of the present invention in the body and absorbs the body fluid, the hydrogen bond between the fibers weakens and the compressed absorbent body expands in its original form, It is possible to prevent the phenomenon that the body fluid is brought into close contact with the inside of the user's body, thereby causing the body fluid to leak to the outside, or falling out of the body by itself.

The step of forming a recessed shape such that the diameter of the hole is gradually decreased toward the other bottom surface of the absorbent body by applying pressure to the bottom surface of the compressed absorbent body by the pressing member 50 is characterized in that the diameter of the compressed absorbent body is gradually reduced And a pin 55 in the form of a polygonal pyramid is formed.

Specifically, the step of forming the depressed shape such that the diameter of the hole gradually decreases toward the bottom surface of the absorber is reduced through the step of pressing the pressing member (50) so that the hole (115) formed in the absorber decreases in diameter toward the bottom surface of the absorber The pin 55 may have a conical shape (see FIG. 2) or a polygonal cone formed so as to gradually decrease its diameter in a direction in which it first comes into contact with the absorbent body. Thus, the hole 115 formed in the absorbent body may have a diameter Can be formed in a reduced depressed shape.

The length of the pin 55 formed in the pressing member 50 may be 9 to 21% of the total length of the absorber 100 to be formed. For example, when the total length of the absorbent body of regular size and / or super size (regular size - absorption amount of 5 g or more, 9 g or less / super absorption amount of 8 g or more and 12 g or less) is 35 to 50 mm, Or the length of the polygonal pyramid pin 55 may be 3.15 to 10.5 mm.

Hereinafter, an embodiment of the present invention will be described. However, the scope of the present invention is not limited to the following preferred embodiments, and a person skilled in the art can carry out various modifications of the contents described in the present invention within the scope of the present invention.

[Manufacturing Example]

Fabrication of Absorbent Body for Insertable Sanitary Napkin

The laminate was laminated so that an absorbent layer made of absorbent fibers including cotton fibers was formed between the liquid permeable layers made of hydrophobic fibers including polyethylene terephthalate. Then, a jet stream containing 1 wt% of starch paste was sprayed at a pressure of 110 bar , And pressed using a squeegee roller. A laminate was jetted at a pressure of 80 bar through a pressurized liquid-permeable layer-absorbent-liquid permeable layer to produce a single fibrous web.

The produced fiber web is dewatered to produce a nonwoven fabric. The nonwoven fabric is cut into a rectangular shape having a longer width than the length of the nonwoven fabric, and then the yarn is provided on one side in the form of wrapping the nonwoven fabric in the longitudinal direction. And the formed side was rolled in the width direction so as to be rolled inward to form a columnar shape.

A nonwoven fabric formed in the form of a column is compressed in the radial direction and then the compressed nonwoven fabric is compressed on the opposite side of the lower surface of the compressed nonwoven fabric by using a pressing member having a conical pin shape formed so that the width gradually decreases, The absorbent body for the sanitary napkin of the present invention was manufactured by forming a hole having a depth of 15% of the total length.

[Experimental Example 1]

Absorption rate versus absorption rate of absorber with or without hole formation

Example 1 in which the absorption amount of the absorber is a regular size, Example 2 in which the absorption amount of the absorber is super-sized, and Example 2 in which the absorption amount of the absorber is a super- And the absorption time, which is the elapsed time from absorption of the absorber molded into the columnar shape to absorption of the regular absorbent amount of Comparative Example 1 of Regular Size and Comparative Example 2 of Super Size of 30 absorptions, was measured and then the average value was calculated.

Regular size and super size classified by the absorption amount of the absorber are specified in Notification No. 2016-68 of the Food and Drug Administration's Regulation (Regular size - Absorption amount of 5 g or more, 9 g or less / Super absorption amount of 8 g or more, or 12 g or less) .

The absorption amount of the absorber was measured according to the absorbance measurement method described in the standards and test method (Food and Drug Administration Notice No. 2016-68) of the Food and Drug Administration's quasi-quasi-drug, and the absorption time absorbs the average absorption amount of the absorber , The 0.01% rhodamine B solution at 20 to 25 ° C in a test tube having a constant thickness was charged with the average absorption amount of each of Examples 1 and 2 and Comparative Examples 1 and 2, and the elapsed time until the liquid in the test tube was completely absorbed Was measured.

regular Super Example 1 Comparative Example 1 Example 2 Comparative Example 2 Absorption
(g) Absorption time
(sec) Absorption
(g) Absorption time
(sec) Absorption
(g) Absorption time
(sec) Absorption
(g) Absorption time
(sec) One 7.41 3.40 7.32 5.21 10.34 3.29 10.66 5.10 2 7.76 3.31 7.20 5.12 11.02 3.31 10.87 5.11 3 7.55 3.68 7.21 5.39 10.71 3.29 10.94 5.15 4 7.64 3.45 7.24 5.13 11.27 3.46 10.86 5.28 5 7.06 3.77 7.73 5.21 10.34 3.33 11.03 5.22 6 7.78 3.28 7.17 5.25 10.59 3.27 10.42 5.36 7 7.76 3.33 7.31 5.18 11.01 3.32 10.16 5.42 8 7.84 3.25 7.89 5.13 10.66 3.73 10.24 5.19 9 7.91 3.29 7.45 5.20 11.03 3.34 10.18 5.05 10 7.73 3.73 7.28 5.21 10.44 3.49 10.69 5.06 11 7.91 3.39 7.73 5.11 10.86 3.82 11.05 5.26 12 7.91 3.44 7.73 5.12 11.16 3.84 10.24 5.35 13 7.89 3.45 7.41 5.20 10.39 3.75 11.15 5.13 14 7.73 3.57 7.16 5.16 10.54 3.16 10.58 5.30 15 7.74 3.29 7.37 5.09 11.19 3.51 10.17 5.09 16 7.76 3.61 7.22 5.12 10.44 3.36 10.78 5.07 17 7.12 3.49 7.31 5.27 10.59 3.41 10.30 5.07 18 7.82 3.47 7.90 5.20 10.80 3.32 10.85 5.11 19 7.24 3.19 7.13 5.20 10.25 3.73 10.90 5.40 20 7.15 3.55 7.08 5.14 11.24 3.18 10.51 5.14 21 7.11 3.23 7.64 5.05 11.22 3.70 10.26 5.40 22 7.58 3.25 7.06 5.16 10.38 3.48 10.71 5.16 23 7.78 3.20 7.39 5.08 10.58 3.63 10.43 5.35 24 7.71 3.29 7.43 5.09 10.84 3.34 10.38 5.32 25 7.20 3.45 7.87 5.15 10.96 3.23 10.89 5.41 26 7.78 3.46 7.78 5.11 11.33 3.58 10.96 5.38 27 7.83 3.47 7.74 5.12 10.46 3.55 10.21 5.30 28 7.56 3.61 7.62 5.13 11.01 3.16 10.23 5.12 29 7.73 3.42 7.84 5.04 10.91 3.43 10.57 5.18 30 7.30 3.41 7.06 5.16 10.42 3.65 10.74 5.35 Average 7.61 3.42 7.44 5.16 10.78 3.46 10.60 5.23

The results are shown in Table 1. In Table 1, the average amount of water absorption in the case of Example 1 and Comparative Example 1 having the same amount of absorption was 7.61 g and 7.44 g, respectively, which was 0.17 g, It was confirmed that the absorption rate of Example 1 was fast, which was 3.24 sec and 5.16 sec, respectively.

Similarly, the superabsorbent Example 2 and Comparative Example 2 did not show a significant difference in the average absorption amount of 10.78 g and 10.60 g, respectively, but the absorption rate of Example 2 was 1.77 sec faster than that of Comparative Example 2 I could confirm.

Therefore, in the case of Example 1 or 2 in which a hole having a recessed shape is formed as compared with Comparative Example 1 or 2 in which a hole is not formed, the absorption rate of the absorber itself is maintained or improved while remarkably improving the absorption rate, It is expected that the leakage of the body fluid to the outside of the body can be prevented.

[Experimental Example 2]

Comparison of absorption rates of absorbers by hole depth and shape

In order to compare the absorption rate of the absorber with the depth and shape of the hole, the absorption rate was measured for each of five samples using the same experimental method as that of the absorption rate experiment of Experimental Example 1, and the average value was calculated.

The test specimens were prepared in the same manner as in Production Example except that the hole depth was 9% of the total length of the absorber, Example 4 formed 21% of the total length of the absorber, Comparative Example 3 formed at 8% of the total length of the absorber, Comparative Example 4 formed at 22% of the total length of the absorber, Comparative Example 5 in which holes were formed at a depth of 15% of the entire length of the absorber, And compared with Example 1.

regular Example 1 Example 3 Example 4 Comparative Example 3 Comparative Example 4 Comparative Example 5 Absorption
(g) absorption
time
(sec) Absorption
(g) absorption
time
(sec) Absorption
(g) absorption
time
(sec) Absorption
(g) absorption
time
(sec) Absorption
(g) absorption
time
(sec) Absorption
(g) absorption
time
(sec) One 7.41 3.40 7.39 4.02 7.03 3.42 7.12 5.11 6.92 3.59 7.10 4.51 2 7.76 3.31 7.34 3.87 7.16 3.47 7.32 5.22 7.06 3.68 7.00 4.49 3 7.55 3.68 7.57 3.72 7.21 3.51 7.06 5.03 6.89 3.58 6.95 4.43 4 7.64 3.45 7.29 3.81 6.99 3.39 7.22 5.09 7.09 3.74 6.99 4.29 5 7.06 3.77 7.41 3.91 7.11 3.45 6.99 4.99 6.87 3.46 7.08 4.36 Average 7.48 3.52 7.40 3.87 7.10 3.45 7.14 5.09 6.97 3.61 7.02 4.39

The result of Table 2 shows that the absorbing time is the second lowest in Example 1 in which the recessed holes are formed at 15% of the entire length of the absorber, and the hole is the lowest at 9% of the entire length of the absorber In Example 4 in which Example 3 formed and the hole was formed at 21% of the entire length of the absorber, the average absorption amount and the average absorption time were slightly decreased as compared with Example 1, but a significant difference in the respective individual absorption amount and absorption time There was no.

On the other hand, in the case of Comparative Example 3 in which the depth of the formed holes was shortened to 8% of the entire length of the absorber, the amount of absorption was decreased and the time of absorption was increased. Compared with Comparative Example 1, It was found that the effect of increasing the absorption rate due to the formation of holes was insignificant. In the case of Comparative Example 4, it was confirmed that the hole depth was 22% of the entire length of the absorber, and the depth of the hole was deeper than that of Example 1, and the absorption amount was reduced to 7 g or less. In Comparative Example 5, It was confirmed that the absorption amount and the absorption rate were decreased as compared with Example 1 in which a hole having a recessed shape was formed.

Therefore, the results of Experimental Examples 1 and 2 show that, in the case of the insertion type sanitary napkin having the safety hole formed therein according to the present invention, the absorption capacity is kept equal to or higher than that of the non- It is possible to prevent a part of the blood from leaking out of the body.

20: removing means 50: pressing member
55: pin
100: absorbent body for sanitary napkin of the insertion type 110: nonwoven fabric
111: absorbing layer 113: liquid-permeable layer
115: hole
120: flat absorber 121: flat absorber
123: flat liquid-permeable layer

Claims (8)

In a columnar absorber molded by rolling a nonwoven fabric (110) having a longer width (W) than a length (L) in a width direction,
A hole 115 is formed in a bottom surface of the columnar absorber in a recessed shape,
The hole (115)
The diameter of the hole gradually decreases toward the other bottom surface of the absorber,
The depth of the hole is 9 to 21% of the total length L of the absorber,
The nonwoven fabric (110)
The liquid permeable layer 113 containing hydrophobic fibers and the absorbent layer 111 including the absorbent fibers are integrated by water punching using a jet stream containing a natural adhesive and a superabsorbent resin,
Wherein the natural adhesive is at least one or more selected from the group consisting of Dacong root liquid, starch paste, corn starch, potato starch, sweet potato starch and tapioca starch. delete delete Woven fabric (110) having a longer width (W) than the length (L) is rolled in the width direction to form an absorber by molding into a columnar shape; And
And applying pressure to a bottom surface of the absorber using a pressing member (50) so that the diameter of the hole gradually decreases toward the other bottom surface of the absorber,
The nonwoven fabric 110, which has a longer width W than the length L,
Integrating the liquid-permeable layer (113) comprising hydrophobic fibers and the absorbent layer (111) comprising absorbent fibers into a single fibrous web through water punching;
Fabricating the nonwoven fabric 110 by dewatering or drying the fibrous web, and
And cutting the manufactured nonwoven fabric 110 into a predetermined shape such that the width W is longer than the length L,
The step of integrating into the single fibrous web comprises:
A first jetting step of jetting a jet stream containing a natural adhesive agent and superabsorbent resin particles at a pressure of 10 to 150 bar to the liquid permeable layer and the absorbent layer after superimposing the liquid permeable layer and the absorbent layer; And
Removing the natural adhesive agent in the liquid permeable layer and the absorbent layer which have passed through the first injection step,
The superabsorbent resin particles include a second jetting step of jetting a jet stream of 10 to 100 bar pressure so as to penetrate deeper into the absorbent layer,
The depth of the hole is 9 to 21% of the total length L of the absorber,
Wherein the natural adhesive is at least one or more selected from the group consisting of Dacong root liquid, starch paste, corn starch, potato starch, sweet potato starch and tapioca starch. delete 5. The method of claim 4,
Wherein the step of fabricating the absorber comprises:
(20) in the form of wrapping the nonwoven fabric in the longitudinal direction on one side of a nonwoven fabric (110) formed to have a longer width than the length, characterized in that one side in which the removing means (20) To form a columnar shape, thereby manufacturing an absorber,
Wherein a part of the removing means (20) is exposed on the other underside of the absorbent body. 5. The method of claim 4,
After the step of manufacturing the absorber,
And compressing the absorbent body in a radial direction, wherein the safety hole is formed in the absorbent body. delete

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