JP2022131483A - absorbent article - Google Patents

Abstract

To provide an absorbent article which is capable of maintaining intensity of perfume until actually worn, of maintaining high level of water absorption performance without decreasing even after body fluid is discharged while put on, and is capable of noticing the user's urination.SOLUTION: An absorbent article 1 includes a liquid permeable top sheet 10, a liquid impermeable back sheet 20, and an absorber 30 arranged between the top sheet 10 and the back sheet 20. Between the top sheet 10 and the absorber 30 is arranged a perfume bag 40. The perfume bag 40 houses a perfume material 41 impregnated with perfume components in a pulp sheet inside a bag body formed into a bag shape by water-soluble films 42, 43. On the surface on the side of the absorber 30 of the bag body, open hole films 45 forming open holes 45h are layered, and it is possible to emit fragrance outside by at least a part of the bag body dissolving when body fluid is discharged while put on.SELECTED DRAWING: Figure 2

Description

The present invention relates to absorbent articles.

When a user wears a disposable diaper or the like, bodily fluids such as feces and urine are excreted, and this odor bothers the user, the caregiver of the user, and those around the user. Therefore, absorbent articles such as paper diapers are required to take measures against odor generation due to excretion of bodily fluids.

As for absorbent articles in which measures against such odors have been taken, for example, attempts have been made to use materials having a deodorant function, which are expected to deodorize odors caused by body fluids, as materials for absorbent articles. there is

For example, Patent Document 1 discloses an absorbent core, a core wrap sheet that covers or is laminated on the absorbent core, and a liquid-permeable outer layer sheet that covers at least one surface of the core wrap sheet. In the absorbent article, the core wrap sheet contains Ag, Au, Pt , Pd, Ni, Mn, Fe, Ti, Al, Zn and Cu. The metal ion-containing cellulose fiber has a Canadian standard freeness of 30 to 400 mL An absorbent article is disclosed which is a sanitary tissue paper containing cellulose fibers containing metal ions.

In addition, as a countermeasure against odor generation due to excretion of bodily fluids, attempts have been made to reduce the discomfort caused by odors caused by bodily fluids by using fragrances with a masking effect or a harmonizing effect instead of deodorizing the odors. .

For example, in Patent Document 2, a coating that disintegrates when wet is provided between a water-impermeable transparent or translucent cover member and a urine absorbing member, and when the coating disintegrates due to wetting, a core is formed. Disclosed is a diaper-type wearing article in which microcapsules are interposed, which are made of a substance that emits a fragrance when the substance goes outside.

Further, Patent Document 3 discloses a paper diaper comprising an airtight, water-soluble bag in which a fragrance is sealed, together with constituent materials of the paper diaper.

WO2017/014255 JP-A-59-106501 Japanese Utility Model No. 63-100021

However, the chemical deodorant method as disclosed in Patent Document 1 described above cannot remove odors to the extent that the odor is not felt completely, and is therefore not sufficient as a deodorant function for absorbent articles such as disposable diapers. Moreover, it is also insufficient in terms of sustaining the deodorizing effect for a long time.

In the method using microcapsules as in Patent Document 2, it is expected that the capsules will disintegrate when the user discharges bodily fluids, and that the aroma components in the capsules will emit aromas to the outside. However, in the case of such microcapsules, the absorber absorbs bodily fluids earlier than the microcapsules, so that the capsules that do not disintegrate remain and the fragrance cannot be released sufficiently to the outside.

As another countermeasure, the present inventors have considered adding (perfuming) fragrant components to constituent members of paper diapers, such as fluff pulp, but have found that this is still insufficient. For example, in an absorbent article such as a paper diaper, the fragrance permeates the packaging material such as polyethylene for packaging the paper diaper and gradually volatilizes over time after the product is shipped, and the scented fragrance does not last. Therefore, when the user uses the absorbent article, the fragrance releasing effect is weakened, and the fragrance cannot be released sufficiently to the outside.

Furthermore, the present inventors have studied not only encapsulation as in Patent Document 2, but also a perfume bag in which a scent component is enclosed in a bag made of a water-soluble film as in Patent Document 3. It turns out that technology is still inadequate. Certainly, it is expected that the storage bag will dissolve when body fluids adhere to the perfume bag, and the scent will be released from the scent component. A problem arises in that the particles enter into the gaps of the member (for example, fluff pulp, etc.) and lower the absorption performance of the absorbent body.

There is also a need, for example, for a caregiver or the like to be able to notice the wearer's urination.

The present invention has been made in view of such circumstances, and is capable of maintaining the strength of the fragrance until it is actually worn, and is capable of reducing the water absorption performance even after body fluids are discharged during wearing. To provide an absorbent article capable of maintaining a high level of urination and allowing a user to notice urination.

As a result of intensive studies to achieve the above-mentioned object, the inventors of the present invention have found that the present It is an absorbent article, and a perfume bag is arranged between the top sheet and the absorbent body, and the perfume bag is formed in a bag shape by a water-soluble film with a fragrant material in which a fragrant component is impregnated in a pulp-based sheet. A perforated film having perforations formed therein is laminated on the surface of the bag body on the absorbent body side, and when bodily fluids are discharged during wearing, at least the bag body is stored. By partially dissolving, the present inventors have found an absorbent article that can release fragrance to the outside, and have completed the present invention based on this finding.

That is, the present invention is as follows.

(1)
An absorbent article comprising a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent body disposed between the topsheet and the backsheet, wherein the absorbent body is disposed between the topsheet and the absorbent body. A fragrance bag is arranged in the fragrance bag, and the fragrance bag contains an aromatic material in which a pulp-based sheet is impregnated with an aromatic component. A perforated film having perforations formed therein is laminated on the surface of the bag body on the absorbent body side, and when body fluids are discharged during wear, at least a part of the bag body dissolves, thereby providing an external absorbent. An absorbent article capable of releasing fragrance into the body.
(2)
The porous film is the absorbent article according to (1), wherein the perforated film is laminated on both the absorbent body side surface of the bag body and the top sheet side surface of the bag body.
(3)
The absorbent article according to (1) or (2), wherein the perforations of the perforated film are circular in top view and have a diameter of 0.5 mm or more and 1 mm or less.

According to the present invention, the strength of the perfume can be maintained until it is actually worn, and even after body fluids are discharged when worn, a high level can be maintained without lowering the water absorption performance, and the user's Absorbent articles can be provided that also allow urination to be noticed.

FIG. 1 is a schematic top view of an absorbent article according to the first embodiment. FIG. 2 is a schematic cross-sectional view taken along line AA of FIG. FIG. 3 is a schematic cross-sectional view of the perfume bag of the first embodiment. FIG. 4 is a schematic bottom view of the perfume bag of the first embodiment. FIG. 5 is a schematic cross-sectional view showing an example of pores in the apertured film of the first embodiment. FIG. 6 is a schematic top view of an absorbent article according to the second embodiment. FIG. 7 is a schematic cross-sectional view taken along line BB of FIG. FIG. 8 is a schematic cross-sectional view of the perfume bag of the second embodiment. FIG. 9 is a schematic diagram for explaining an example of the manufacturing method of the perfume bag of the second embodiment. FIG. 10 is a cross-sectional schematic diagram of an example of a conventional perfume bag.

EMBODIMENT OF THE INVENTION Hereinafter, the form (only henceforth "this embodiment") for implementing this invention is demonstrated in detail. The following embodiments are examples for explaining the present invention, and are not intended to limit the present invention to the following contents. The present invention can be appropriately modified and implemented within the scope of the gist thereof.

In the drawings, the same elements are denoted by the same reference numerals, and overlapping descriptions are omitted. In addition, unless otherwise specified, positional relationships such as up, down, left, and right are based on the positional relationships shown in the drawings. Furthermore, the dimensional ratios of the drawings are not limited to the illustrated ratios.

In the present specification, the term "abbreviation" indicates the meaning of the term excluding the "abbreviation" within the scope of the technical common sense of a person skilled in the art, and the meaning itself excluding the "abbreviation" shall also include

[First embodiment]

FIG. 1 is a schematic top view of an absorbent article according to the first embodiment, FIG. 2 is a schematic cross-sectional view taken along line AA of FIG. 1, and FIG. 3 is a perfume bag of the first embodiment. 4 is a schematic bottom view of the perfume bag of the first embodiment, and FIG. 5 is a schematic cross-sectional view showing an example of pores of the perforated film of the first embodiment.

The absorbent article 1 according to this embodiment includes a liquid-permeable topsheet 10, a liquid-impermeable backsheet 20, and an absorbent body 30 disposed between the topsheet 10 and the backsheet 20. A fragrance bag 40 is arranged between the top sheet 10 and the absorbent body 30. The fragrance bag 40 comprises a pulp-based sheet impregnated with a fragrance ingredient 41 and a water-soluble film 42. , 43 in a bag shape. Here, a case is illustrated in which two water-soluble films 42 and 43 are superimposed and heat-sealed to form a bag body. A perforated film 45 having perforations 45h is laminated on the surface of the bag main body on the absorber 30 side. Therefore, when the perfume bag 40 is viewed from the bottom (that is, from the absorber 30 side), as shown in FIG. 4, the perforated film 45 is laminated on the surface. The absorbent article 1 having such a structure emits fragrance to the outside when the body fluid is discharged during wear, at least a part of the water-soluble films 42 and 43 constituting the bag body is dissolved by the body fluid. It is possible to Also, a large amount of the dissolved water-soluble films 42 and 43 are not absorbed by the absorber 30 .

In the description of this specification, when the absorbent article 1 is worn means at least one of when the absorbent article 1 is worn and after the absorbent article 1 is worn. The longitudinal direction of the absorbent article 1 is the direction that spans the front and back of the user when the absorbent article 1 is worn. Moreover, the width direction of the absorbent article 1 is a direction transverse or perpendicular to the longitudinal direction. Furthermore, the skin-contacting surface is the surface facing the user's skin (see arrow F) when worn, among the front and back surfaces of each member such as the absorbent body 30, and the non-skin-contacting surface is the absorbent. Of the front and back surfaces of each member such as the body 30, it is the surface facing away from the user's skin when worn. Body fluids refer to liquids excreted from the body to the outside of the body, such as urine, blood, and water in loose stools.

In addition, the absorbent article 1 is exemplified by a light incontinence pad, a pants-type paper diaper, a tape-fastened paper diaper, and the like, regardless of whether it is for baby use, adult use, or nursing care use, but is not limited to these, and is not limited to these. It may be a sexual article 1.

Each member will be described below.

<Top sheet>

As the top sheet 10, a known one can be used. The top sheet 10 is preferably made of a liquid-permeable nonwoven fabric that allows body fluids to move to the absorbent body 30 . The bodily fluid that flows out onto the top sheet 10 diffuses into the absorbent body 30 and is quickly absorbed by the absorbent body 30 .

The top sheet 10 is, for example, a nonwoven fabric such as an air-through nonwoven fabric, a thermal bonded nonwoven fabric, a spunbond nonwoven fabric, a two-layer laminated composite nonwoven fabric of thermal bond/spunbond, a foamed film such as urethane foam, or a composite sheet in which these are laminated. It is preferably formed from

In addition, the top sheet 10 may be embossed or perforated on the surface in order to improve liquid permeability. As a method for applying these embossing and perforating, known methods can be implemented without limitation. In order to reduce irritation to the skin, the top sheet 10 may contain a lotion, an antioxidant, an anti-inflammatory ingredient, a pH adjuster, an antibacterial agent, a moisturizing agent, and the like.

Although the basis weight of the top sheet 10 is not particularly limited, it is preferably 18 g/m ^{2 or more and 400 g/m 2 or} less from the viewpoint of strength, processability, and liquid return amount. The shape of the top sheet 10 is not particularly limited as long as it can guide bodily fluids to the absorbent body 30 without leakage. The top sheet 10 is provided so as to cover the entire surface of the absorbent body 30, but is not limited to this, and for example, may be configured such that a part of the absorbent body 30 is exposed. From the viewpoint of efficiently guiding bodily fluids to the absorbent body 30 , the top sheet 10 is preferably arranged so as to cover the absorbent body 30 .

<Three-dimensional gather>

The absorbent article 1 may be provided with a pair of three-dimensional gathers 50 on the skin side surface of the top sheet 10 along the longitudinal direction of the absorbent article 1 in order to prevent lateral leakage of bodily fluid excreted by the user. . One widthwise end of the three-dimensional gathers 50 in the widthwise direction of the absorbent article 1 is fixed near both side edges of the skin side surface of the backsheet 20 (or near both side edges of the non-skin side surface). The three-dimensional gathered sheet is arranged such that the other end in the width direction is a free end that is not fixed to the top sheet 10 .

In addition, by providing the elastic elastic members 51 for the three-dimensional gathers along the longitudinal direction near the free ends of the three-dimensional gathers 50, the free ends of the three-dimensional gathers 50 are provided with uprightness and can be deformed according to the user's body shape. can do. Note that the three-dimensional gathers 50 may not be provided in this embodiment.

As the three-dimensional gather elastic stretchable member 51, for example, a polyurethane thread, a strip-shaped polyurethane film, a thread-shaped or strip-shaped natural rubber, or the like is used when worn. Permeable nonwoven fabrics, such as spunbond nonwoven fabrics, meltblown nonwoven fabrics, composite nonwoven fabrics that are laminates of spunbond nonwoven fabrics/meltblown nonwoven fabrics/spunbond nonwoven fabrics, etc., are used when worn.

<Back seat>

The back sheet 20 can use a known one, and is preferably formed using a base material having liquid impermeability so that the body fluid retained by the absorbent body 30 does not wet clothes. It is preferably formed from a material such as a film or a composite sheet obtained by laminating a resin film and a nonwoven fabric. The nonwoven fabric used for the composite sheet is not particularly limited in manufacturing method, and examples thereof include spunbond nonwoven fabrics, meltblown nonwoven fabrics, spunbond/meltblown or spunbond/meltblown/spunbond laminated composite nonwoven fabrics, and composite materials thereof. be done. Examples of resin films include polyester, polyvinyl alcohol, polyethylene, polypropylene, composite films of polyethylene and polypropylene, and the like.

Although the basis weight of the backsheet 20 is not particularly limited, it is preferably 15 g/m ² or more and 40 g/m ² or less from the viewpoint of strength and workability. In addition, from the viewpoint of preventing stuffiness during wearing, the back sheet 20 is preferably breathable. A method for imparting breathability to the backsheet 20 is not particularly limited, and a known method can be employed. Examples thereof include a method of making a resin film serving as the base material of the back sheet 20 porous, a method of embossing the base material of the back sheet 20, and the like. An example of a method for making a resin film porous includes a method of making a resin contain a filler to form a film, and removing the filler from the resulting film. Examples of fillers include inorganic salts such as calcium carbonate.

<Absorber>

As the absorber 30, a known one can be used. Examples include those containing fluff pulp and superabsorbent polymers.

Examples of fluff pulp include wood pulp (for example, bleached softwood kraft pulp (NBKP) such as southern pine and Douglas fir), synthetic fiber, resin fiber, non-wood pulp, and the like, which are fibrillated into cotton. can.

The superabsorbent polymer is not particularly limited as long as it can absorb body fluids and prevent backflow. Sodium polyacrylate, polyaspartate, (starch-acrylic acid) graft copolymer, Materials such as (acrylic acid-vinyl alcohol) copolymer, (isobutylene-maleic anhydride) copolymer, and saponified products thereof can be worn. Among these, the sodium polyacrylate type is preferable from the viewpoint of the absorption amount per weight.

The form of the fluff pulp and the superabsorbent polymer in the absorbent body 30 may be one formed by mixing superabsorbent polymer particles in the fluff pulp. A polymer sheet may also be used.

For the purpose of preventing leakage of the superabsorbent polymer particles and stabilizing the shape of the absorbent body 30, the absorbent body 30 may be wrapped in a carrier sheet. The base material of the carrier sheet may be any material as long as it is hydrophilic, and examples thereof include hydrophilic nonwoven fabrics such as tissues, absorbent paper, and air-laid nonwoven fabrics. When a plurality of carrier sheets are provided, the substrates of the plurality of carrier sheets may be the same or different.

<perfume bag>

The fragrance bag 40 contains a fragrance material 41 inside a bag body formed of water-soluble films 42 and 43 in a bag shape. Furthermore, a perforated film 45 having perforations 45h is laminated on the surface of the bag main body on the absorber 30 side.

Here, an example of a conventional perfume bag using a water-soluble film will be described.

FIG. 10 is a cross-sectional schematic diagram of an example of a conventional perfume bag.

A conventional perfume bag 400 contains a perfume material 410 in a bag body composed of two water-soluble films 420 and 430 . Then, they are integrated by a seal portion 440 . When the body fluid excreted by the user comes into contact with the perfume bag 400, the water-soluble films 420 and 430 dissolve and the perfume material 410 emits a scent to the outside. be. However, when the water-soluble films 420 and 430 constituting the bag body are dissolved, they become pasty (high-viscosity fluid). For example, when the user urinates, a large amount of body fluid comes into contact with the water-soluble films 420 and 430, so that a large amount of the water-soluble films 420 and 430 that have dissolved and become pasty are generated, and this is the bottom of the perfume bag 400. It gets into the gaps of the constituent members (for example, fluff pulp, etc.) of the absorbent body (not shown) located at the . As a result, the absorption performance of the absorbent body is lowered.

However, in the absorbent article 1 of the present embodiment, by providing the perforated film 45 having the perforations 45h on the surface of the bag body on the absorbent body 30 side, such a pasty water-soluble film 42, 43 can be prevented from entering the gap. The perforated film 45 prevents the pasty water-soluble films 42 and 43 from flowing downward where the absorbent body 30 is located. can be suppressed from being absorbed. Thereby, it is possible to prevent the absorbability of the body fluid of the absorber 30 from deteriorating. Each member of the perfume bag 40 will be described below.

(bag body)

The water-soluble films 42 and 43 constituting the bag body are preferably water-soluble resin films such as polyvinyl alcohol films (PVA films) from the viewpoint of high chemical resistance, fragrance retention, and heat-sealing properties. preferable.

The PVA film is preferably soluble in water at 10°C or less. In general, polyvinyl alcohol is soluble in hot water (does not dissolve in cold water, dissolves only in hot water such as 60 ° C or higher or 70 ° C or higher) or cold water soluble type (in a wide water temperature range from cold water to hot water) So-called cold water soluble is more preferable in the present embodiment. If it is soluble in cold water, it can quickly dissolve and release its aroma regardless of the temperature of the body fluid.

Also, the PVA film preferably has excellent chemical resistance and gas barrier properties. By having such properties, it is possible to prevent the film from being unintentionally eroded by chemicals other than body fluids, acids, alkalis, and the like.

Although the thickness of the water-soluble films 42 and 43 such as PVA is not particularly limited, the films 42 and 43 can firmly enclose the fragrant material 41 to be contained therein, and when they come into contact with bodily fluids, they quickly dissolve and release the fragrant material to the outside. is preferably 20 μm or more and 60 μm or less, more preferably 30 μm or more and 50 μm or less, and even more preferably 35 μm or more and 45 μm or less, from the viewpoint of being able to release . When the thickness is within the above range, the fragrant material 41 stored therein can be firmly held when not in use, and the amount of the resin dissolved in body fluids and made into a pasty state can be kept low when in use. When the amount of resin that has dissolved and become pasty is small, it is possible to more effectively prevent the resin from flowing into the absorbent body 30 .

From the above point of view, the complete dissolution time of the water-soluble films 42 and 43 in 10° C. water is preferably 15 seconds or more and 45 seconds or less, more preferably 20 seconds or more and 40 seconds or less. The complete dissolution time was determined by taking water-soluble films 42 and 43 of 6 cm×6 cm squares with 3 cm×3 cm squares cut out at the center as samples, and immersing them in water at 10° C. and starting stirring. Then, it is obtained by measuring the time until the film is completely dissolved in water by visual observation.

Moreover, from the above-described viewpoint, the tearing time of the water-soluble films 42 and 43 in water at 10° C. is preferably 3 seconds or more and 20 seconds or less, more preferably 5 seconds or more and 18 seconds or less, and 7 seconds. More preferably, it is 15 seconds or less. For the tearing time, a sample of water-soluble films 42 and 43 cut into 8 cm×8 cm squares is placed in water at 10° C. and stirring is started. Then, it is obtained by measuring the time until the film is torn in water by visual observation.

The bag body of the perfume bag 40 may be formed of the water-soluble films 42 and 43, but it is composed of at least two water-soluble films 42 and 43, and the two water-soluble films 42 and 43 are superimposed. It preferably has a seal portion 44 which is heat-sealed at the edge of the. For example, when the water-soluble films 42 and 43 are substantially rectangular, the seal portion 44 may seal the entire perimeter of the edges, or seal the three sides of the folded water-soluble films 42 and 43. Anything is fine. There is no particular restriction on the method of making the bag, as long as it is sealed so that the flavor component does not volatilize until the perfume bag 40 comes into contact with bodily fluids.

Furthermore, the seal portion 44 may be formed by heat-sealing the water-soluble films 42 and 43 and the perforated film 45 . Although details will be described later, the fragrant material 41 is placed on the water-soluble film 43 (absorbent body 30 side), and the other water-soluble film 42 (top sheet 10 side) and the perforated film 45 are placed thereon. It is also possible to heat seal the edges of the water-soluble films 42, 43 and the apertured film 45, which are placed in sequence and overlapped, at the same time.

(Aroma component)

The fragrant material 41 of the fragrant bag 40 is a pulp-based sheet impregnated with a fragrant component. When the aroma component is liquid, the liquid aroma component can be immobilized by impregnating the pulp-based sheet with the aroma component. The pulp-based sheet also includes sheets such as various types of paper and non-woven fabric, as will be described later.

The bag body formed of the water-soluble films 42 and 43 is heat-sealed so that the thickness of the sealed portion 44 is reduced, and the strength may be weakened or pinholes may be formed. . In such a case, if the liquid flavoring agent is put directly into the bag body, the liquid flavoring agent may leak from the portion where the strength of the bag body is weakened or the portion where the pinhole is generated. If such leakage is severe, the absorber 30 will be in an oil-stained state. In addition, since some perfumes weaken the adhesive strength of the hot-melt, the members constituting the absorbent article 1 may be peeled off when such perfumes are used. However, in the present embodiment, instead of directly putting the liquid perfume into the bag main body, the pulp-based sheet is impregnated with the aromatic component and contained therein, so that the occurrence of such problems can be effectively suppressed. .

Fragrances such as natural fragrances and synthetic fragrances can be used as the fragrance component, but those having a masking effect against the odor of excrement and, in particular, a harmonizing effect are preferred. Specific examples of the aromatic components include garnet, benzoin, castoreum, spirit cat, clove oil, galbanum, jasmine absolute, melilot, mimosa, musk tonkin, rosemary oil, sandalwood oil, vetiver oil, and violet leaf absolute. Naturally extracted fragrances such as; higher alcohols, aldehydes, benzaldehyde, benzoic acid, cinnamic acid, cinnamic aldehyde, cinnamic alcohol, esters, ketones, salicylic acid and their derivatives, and various synthetic fragrances such as vanillin; and mixtures of two or more of As the perfume, other known perfumes and commercially available perfumes can also be used. Moreover, it is preferable that the aromatic component is liquid at normal temperature and normal pressure.

The aroma component may contain known additives and solvents in addition to the perfumes described above.

The pulp-based sheet to be impregnated with the aromatic component is not particularly limited, but examples thereof include filter paper and air-laid nonwoven fabric. Among these, filter paper is preferable from the viewpoint that a large amount of aromatic components can be impregnated without deteriorating. Examples of pulps include pulps such as bleached softwood kraft pulp (NBKP) such as radiata pine, slash pine, southern pine, lodgepole pine, spruce, and Douglas fir. These may be used individually by 1 type, and may use 2 or more types together.

Although not shown, the perfume bag 40 can be manufactured, for example, by the following method.

A bag body having an opening is obtained by overlapping two water-soluble films 42 and 43 and heat-sealing the edges except at least a portion of the overlapped edges. Then, the fragrant material 41 is introduced into the inside of the bag body through the opening, and the fragrant material 41 is sealed inside the bag body by heat-sealing the opening end. Then, the perfume bag 40 can be obtained by laminating the perforated film 45 on the surface of the water-soluble film 43 (on the absorber 30 side).

Alternatively, the fragrant material 41 is placed on the water-soluble film 42 (on the side of the top sheet 10), and another water-soluble film 43 (on the side of the absorbent body 30) and the perforated film 45 are superimposed in this order, The perfume bag 40 can also be obtained by heat-sealing the edges of the water-soluble films 42, 43 and the perforated film 45. FIG. Thus, in this embodiment, heat sealing may be performed not only with the water-soluble films 42 and 43 but also with the perforated film 45 .

In addition, although the perfume bag 40 may be manufactured one by one, a continuous laminate having a plurality of perfume bags 40 may be produced, and a manufacturing method may be used in which the bag is cut by a paper diaper manufacturing machine or the like. .

(Perforated film)

The perforated film 45 preferably contains an olefin resin. Examples of olefin resins include polyethylene and polypropylene. Among these, polyethylene is more preferable from the viewpoint of softness. Specific examples of the perforated film 45 include, for example, olefin resin films such as polyethylene films and polypropylene films.

The number of holes 45h per unit area of the hole film 45 is preferably 40/cm ² or more and 130/cm ² or less. By setting the number of perforations 45h per unit area of the perforated film 45 within the above range, it is possible to further improve the balance between preventing the pasty water-soluble films 42 and 43 from bleeding out and volatilizing the fragrance. . The number of openings 45h per unit area can be measured by counting the number of openings 45h within a certain range of the perforated film 45, but the perforations at the boundaries are not completely within the measurement range. If not, the area is measured and the value divided by the average area of the openings 45h is used.

When the opening 45h is circular in top view, the diameter of the opening 45h (opening diameter d, see FIG. 5) is preferably 0.5 mm or more and 1 mm or less. By setting the diameter within the above range, it is possible to prevent the paste-like water-soluble films 42 and 43 from bleeding out from the opening 45h. The diameter (aperture diameter d) referred to here is, for example, the diameter seen from the surface of the perforated film 45 on which there is no rib R protruding in a tapered shape (the larger diameter of both surfaces). It is the arithmetic mean of the diameters of the apertures 45h formed in the film 45 (aperture diameter d). Moreover, when the opening 45h is not a perfect circle, it is assumed to be a perfect circle having the same area as its area, and its diameter is adopted.

The basis weight of the perforated film 45 is preferably 20 g/m ² or more and 60 g/m ² or less, more preferably 23 g/m ² or more and 30 g/m ² or less, from the viewpoint of strength, processability, and the like. . By setting the basis weight to the above lower limit or more, there is a tendency to further prevent breakage of the film, and by setting the basis weight to be equal to or less than the above upper limit, it is possible to further prevent the texture from becoming hard. be.

Moreover, the perforated film 45 may be laminated on the surface of the bag main body on the absorbent body 30 side. As a lamination method, it may be heat-sealed together with the water-soluble films 42 and 43, or may be adhered with an adhesive. When heat-sealing, a hot-melt adhesive or the like may be used together.

The method for manufacturing the perforated film 45 is not particularly limited, and it may be manufactured by a known method. For example, when the perforated film 45 is an olefin resin film, there is a method in which the olefin resin composition is molded into a film and then the film is perforated. A method for forming the olefin resin composition into a film is not particularly limited, and for example, a casting method, a laminating method, an inflation film forming method, or the like can be employed. Also, the olefin resin composition may be melt-kneaded in advance using a twin-screw extruder or the like before film formation. Furthermore, the method of perforating the film also includes a method of perforating the apertures with high-temperature air, a method of perforating the apertures with high-pressure hot water, a method of perforating the apertures with a heated needle, and a method of perforating the apertures with a laser. method etc. can be adopted. As a specific example, for example, an olefin resin composition is molded into a film by a casting method, and a punching metal having a predetermined porosity (perforated plate having an opening pattern) or the like is brought into contact with the film, Examples include a method of performing perforation molding by blowing high-temperature air.

In the perforated film 45 obtained by the above-described manufacturing method or the like, the perforations 45h are formed by subjecting the non-perforated film to the perforation process, so ribs R are formed on the film surface due to perforation. That is, in producing the perforated film 45, as shown in FIG. 5, ribs R may be formed on the peripheries of the perforations 45h. When a tapered rib R protruding from one surface (first surface) toward the opposite surface (second surface) is formed in the opening 45h of the perforated film 45, the rib R Due to this, it is possible to more effectively suppress the occurrence of stickiness during use. Furthermore, as will be described below, it is preferable that the surface (second surface) on which the tapered ribs R are present is arranged on the bag main body side.

For example, since a material such as nonwoven fabric used for the top sheet 10 is liquid-permeable, the top sheet 10 is often porous and has a low basis weight. Therefore, even if the pasty water-soluble films 42 and 43 have low fluidity, the fibers of the non-woven fabric and the like will be displaced from the resin of the water-soluble films 42 and 43 by the pressure of the weight of the user. In some cases, the pasty water-soluble films 42 and 43 ooze out from between the fibers.

In this respect, according to the present embodiment, the perforated film 45 can be manufactured by the method described in Japanese Patent Application Laid-Open No. 11-206811, for example. For example, a film containing polyethylene as a main component is placed on a perforated plate having an aperture pattern, and hot air is blown thereon to form apertures having shapes corresponding to the apertures of the perforated plate. Manufacturing methods can be used. When the perforated film 45 is manufactured by such a manufacturing method, the shape of the perforations 45h is the surface opposite to the surface (first surface, see the upper side of FIG. 5) to which high-temperature air is blown ( A tapered rib R projecting from the second surface (see lower side of FIG. 5) is formed (see Blow and R etc. in FIG. 5).

In this way, the tapered shape protrudes from one surface (first surface, see the upper side of FIG. 5) of the perforated film 45 toward the opposite surface (second surface, see the lower side of FIG. 5). When the rib R is formed on the periphery of the aperture 45h, when the user's weight is applied to the perforated film 45, the rib R is crushed and the aperture 45h is closed. It is possible to prevent the shaped water-soluble films 42 and 43 from passing through the openings 45h. As a result, it is possible to effectively prevent the phenomenon that the water-soluble resin oozes out to the surface, and further effectively suppress the occurrence of stickiness.

Furthermore, in this embodiment, it is preferable that the surface (second surface) on which the tapered ribs R are present is arranged so as to face the bag main body. By adopting such an arrangement, the pasty water-soluble films 42 and 43 are less likely to pass through the openings 45h. The crushed ribs R act as spacers, forming a slight gap between the water-soluble films 42 and 43 and the perforated film 45 . Through this gap, the aroma component is not blocked by the weight of the user and is not blocked by the pasty water-soluble resin. can emit. As a result, more fragrance can be emitted to the outside.

<Diffusion layer>

In this embodiment, the perfume bag 40 may be arranged between the top sheet 10 and the absorbent body 30 . Therefore, although not shown, this embodiment may further include a diffusion layer. A diffusion layer can be provided, for example, between the perfume bag 40 and the top sheet 10 and/or between the perfume bag 40 and the absorbent body 30 .

[Second embodiment]

FIG. 6 is a schematic top view of an absorbent article according to the second embodiment, FIG. 7 is a schematic cross-sectional view along line BB of FIG. 6, and FIG. 8 is a perfume bag of the second embodiment. It is a cross-sectional schematic diagram.

In the absorbent article 2 according to the second embodiment, the perforated films 63 are laminated on both the surface of the bag body on the absorbent body 30 side and the surface of the bag body on the top sheet 10 side. Differs from one embodiment. The absorbent article 2 also differs from the first embodiment in that a sheet of water-soluble film 62 wraps the fragrance material 61 to form a bag body. Thus, the perforated film 63 is preferably laminated on both the surface of the bag body on the absorbent body 30 side and the surface of the bag body on the top sheet 10 side. By wrapping the entire bag, it is preferable to laminate both the surface of the bag main body on the absorbent body 30 side and the surface of the bag main body on the top sheet 10 side.

In the absorbent article 2, one water-soluble film 62 and one perforated film 63 are folded in two to enclose the fragrance material 61, and the peripheries of the absorbent article 2 are heat-sealed to form a sealed portion 64. formed. In the absorbent article 2, the seal portion 64 is formed so as to surround the periphery on three sides in the top view, instead of being formed to surround the periphery on the four sides in the top view as in the first embodiment. be. In other words, the one peripheral edge where the seal portion 64 is not formed is the folded side where the water-soluble film 62 and the perforated film 63 are folded in two (see FIG. 6, etc.).

FIG. 9 is a schematic diagram for explaining an example of the manufacturing method of the perfume bag of the second embodiment.

A long water-soluble film 62 and a similarly long perforated film 63 are superimposed. Then, on the surface of the water-soluble film 62 side, a plurality of fragrant materials 61 are arranged at predetermined intervals along the longitudinal direction and folded in two in the width direction. Then, the three open ends are sealed by heat sealing or the like, and the vertical boundary is heat sealed. As a result, a continuous laminate 60S having a plurality of perfume bags 60 in the longitudinal direction is obtained. Although four perfume bags 60, 60a, 60b, and 60c are shown in FIG. 9, a continuous laminate 60S having more or less pieces may be used.

Then, a plurality of flavor bags 60 are obtained by cutting and separating the longitudinal boundaries (borders in the lateral direction, see cut in FIG. 9) of the flavor bags 60 arranged side by side in the continuous laminate 60S.

If the bonding between the water-soluble film 62 and the perforated film 63 is weak only by heat-sealing, a hot-melt adhesive may be applied in advance to the portion to be heat-sealed. Also in the case of the first embodiment, a hot melt adhesive can be applied similarly.

In the case of the first embodiment, for example, when the above-described ribs R are present in the perforations 45h of the perforated film 45, it may be difficult to obtain sufficient strength by heat sealing as they are. In such a case, the ribs R of the perforated film 45 can be crushed by heat-sealing to make the peripheries of the perforations 45h flat. Further, by remelting the hot-melt adhesive, the water-soluble films 42 and 43 can be adhered more strongly. Also in the second embodiment, when the perforated film 63 has perforated ribs R, the water-soluble film 62 and the perforated film 63 can be adhered more strongly in the same manner as in the first embodiment. can.

As described above, the absorbent articles 1 and 2 according to the present embodiment can maintain the strength of the fragrance until they are actually worn, and even after body fluids are discharged during wearing, the water absorption performance is reduced. A high level can be maintained without needing to do so, and the user's urination can also be noticed. For example, when the user urinates, the fragrance is released to the outside of the absorbent articles 1 and 2, so that the caregiver can notice the urination by using this fragrance as a trigger. Furthermore, when it is used for diapers, etc., discomfort during diaper changing can be reduced. From such a point of view, the absorbent articles 1 and 2 according to the present embodiment can be suitably used as a paper diaper or the like including the same. In particular, it can be suitably used as an absorbent article for nursing care (for example, paper diapers for nursing care) for users who need caregivers.

1, 2: Absorbent article 10: Top sheet 20: Back sheet 30: Absorbers 40, 60, 60a, 60b, 60c: Fragrance bags 41, 61: Fragrance materials 42, 43, 62: Water-soluble films 44, 64: Seal parts 45, 63: perforated film 45h: perforations 50: three-dimensional gathers 51: three-dimensional gathers elastic elastic member 60S: continuous laminate 400: (conventional) fragrance bag 410: (conventional) fragrance material 420:, 430 : (conventional) water-soluble film 440: (conventional) seal portion F: arrow R: rib d: hole diameter

Claims (3)

An absorbent article comprising a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent body disposed between the topsheet and the backsheet,
A perfume bag is arranged between the top sheet and the absorbent body,
In the flavoring bag, a flavoring material obtained by impregnating a pulp-based sheet with a flavoring component is housed inside a bag body formed in a bag shape by a water-soluble film,
A perforated film having perforations is laminated on the surface of the bag body on the absorbent body side,
At least a part of the bag body dissolves when body fluids are discharged when the bag is worn, so that the scent can be released to the outside.
absorbent article. The perforated film is laminated on both the absorbent body side surface of the bag body and the top sheet side surface of the bag body,
The absorbent article according to claim 1. The apertures of the apertured film are circular in top view,
The diameter of the aperture is 0.5 mm or more and 1 mm or less.
The absorbent article according to claim 1 or 2.

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