WO2021038876A1

WO2021038876A1 - Absorbent article

Info

Publication number: WO2021038876A1
Application number: PCT/JP2019/034291
Authority: WO
Inventors: 広嗣中島; 芳久渡部; 坂口　智; 範朋栗田
Original assignee: ユニ・チャーム株式会社
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2021-03-04
Also published as: BR112021026654A2; CN114206282B; CN114206282A

Abstract

This absorbent article (1) has a coating portion (R) coated with a plurality of microcapsules (MC). Each of the plurality of microcapsules (MC) contains an insect-repellent fragrance, and has a marker part (M) indicating the coating portion (R).

Description

Absorbent article

The present invention relates to an absorbent article.

Disposable diapers with an absorber that absorbs excrement are used not only in raising infants and nursing adults, but also in raising pets. Further, Patent Document 1 describes an absorbent article that prevents the invasion of pests into the absorbent article by providing an insect repellent microcapsule in which a natural plant extract exhibiting an insect repellent effect is microencapsulated.

Special Table 2012-522618

In the process of transporting and storing the absorbent article as described in Patent Document 1, the invasion of insects can be prevented by releasing the fragrance inside the capsule, but as the release progresses, the wearer can prevent it. When using, it is difficult to control the amount of fragrance, and it may be difficult to secure the active ingredient.

The present invention has been made in view of the above problems, and an object of the present invention is to adjust the amount of fragrance by the user himself / herself when wearing an absorbent article or at a desired timing during wearing. It is an object of the present invention to provide an absorbent article that can be adjusted and exerts an insect repellent effect.

The main invention for achieving the above object is an absorbent article having a coated portion coated with a plurality of microcapsules, each of the plurality of microcapsules containing an insect repellent fragrance, and the coating thereof. It is an absorbent article characterized by having a mark portion indicating a work portion.
Other features of the present invention will be clarified by the description in this specification and the accompanying drawings.

According to the present invention, the amount of the fragrance can be adjusted by the user himself / herself at the time of wearing the absorbent article or at a desired timing during wearing, and the insect repellent effect can be easily exhibited.

FIG. 1 is a plan view of the skin side of the diaper 1 in an unfolded and stretched state. FIG. 2 is a non-skin side plan view of the diaper 1 in an unfolded and stretched state. FIG. 3 is an enlarged view of the coating portion R and schematically shows the state of the plurality of microcapsules MC. FIG. 4 is an enlarged view of a portion X in FIG. FIG. 5 is an enlarged view showing another example of the coating portion R. FIG. 6 is an enlarged view showing still another example of the coating portion R. FIG. 7 is an enlarged view showing still another example of the coating portion R. FIG. 8 is a diagram showing a state in which the diaper 1 having the decorative symbol 50 is worn.

The description of the present specification and the accompanying drawings will clarify at least the following matters.
An absorbent article having a coated portion coated with a plurality of microcapsules, each of the plurality of microcapsules containing an insect repellent fragrance and having a mark portion indicating the coated portion. It is an absorbent article.

According to such an absorbent article, the presence of the mark makes it easier for the user to directly rub the coated part of the microcapsule, and the physical stimulus caused by the rubbing breaks the microcapsule newly, which efficiently causes insects. The repellent fragrance can be released. In this way, by breaking the microcapsules by the user himself / herself at a desired timing such as when wearing or while wearing, the amount of fragrance can be adjusted by the user himself / herself, and an insect repellent effect can be exhibited.

It is desirable that the coated portion of the absorbent article has a coating color different from that of the surroundings and forms the mark portion.

According to such an absorbent article, the coated portion of the microcapsule has a color different from that of the surroundings, so that it is conspicuous and easily recognized by the user, and the coated portion itself can be a mark portion.

In such an absorbent article, it is desirable that the coating color has a dark portion and a light portion whose color is lighter than the dark portion.

According to such an absorbent article, having a shade makes the coated part more conspicuous and functions as a mark part.

It is desirable that the coated portion of the absorbent article has a plurality of embossed portions, and the plurality of embossed portions are the light portions.

According to such an absorbent article, each of the plurality of embossed portions is a recess, and the depth (shadow) of the embossed recess is further emphasized by the embossed portion being a light portion having a light coating color. , The shade of the coating part becomes clear. As a result, the coating part becomes more noticeable.

In such an absorbent article, the coated portion has a first portion and a second portion, and the coating amount per unit area of the plurality of microcapsules in the second portion is the first portion. It is desirable that the amount of coating in one portion is less than the amount of coating per unit area, the first portion is the dark portion, and the second portion is the light portion.

According to such an absorbent article, a dark portion of the coated portion is formed by a portion of the microcapsule with a large amount of coating, and a light portion is formed by a portion of a small coating amount. By forming shades by adjusting the amount of coating, a pattern or the like due to shades can be formed in the coated portion, and the coated portion can be made conspicuous. Further, since the light portion is formed by reducing the coating amount, the coating amount of the microcapsules can be reduced.

Such an absorbent article having a front waist circumference portion, a rear waist circumference portion, and a crotch portion located between the front waist circumference portion and the rear waist circumference portion, and the width direction of the absorbent article in the rear waist circumference portion. It is desirable that side flaps are provided at the ends of the side flaps, a pair of fastening tapes are provided on the side flaps, and the coating portion is provided on the pair of fastening tapes.

According to such an absorbent article, the fastening tape is a part that the user always touches with a finger when wearing the absorbent article, and a coating portion coated with microcapsules is provided in such a place. As a result, the microcapsules can be efficiently rubbed to make them easier to break. Therefore, the insect repellent effect is easily exhibited when worn.

It is desirable that the color of the pair of fastening tapes is different from the color of the side flaps of such an absorbent article.

According to such an absorbent article, having a color different from the color of the side flap makes the fastening tape more conspicuous, and makes it easier for the user to instantly recognize the position of the fastening tape.

It is desirable that the color of the pair of fastening tapes is different from the color of the coated portion in the absorbent article.

According to such an absorbent article, among the fastening tapes coated with microcapsules, the color of the coated portion is made different from the color of the fastening tape, so that the user can easily recognize the position of the coated portion. To do. As a result, the wearer can surely easily touch the coated portion, and the microcapsules can be broken efficiently. Further, depending on the color of the coated portion, it can be a mark portion that stands out even in a dark place or the like, and a physical stimulus can be given even in a dark place to exhibit an insect repellent effect.

It is desirable that the color of the pair of fastening tapes, the color of the side flaps, and the color of the coated portion of the absorbent article are different from each other.

According to such an absorbent article, each member can be made to stand out by having different colors of the side flap, the fastening tape joined to the side flap, and the coated portion provided in the fastening tape. it can. In particular, the different colors of the side flaps and the fastening tape make the fastening tape stand out, and the different colors of the coated portion make the location of the coated portion more conspicuous. Further, depending on the color of the coated portion, the insect repellent effect can be exhibited even in a dark place using the coated portion as a mark portion.

It is desirable that the mark portion of the absorbent article is a display that encourages the user to touch the coated portion.

According to such an absorbent article, the mark portion is a display (character, picture, etc.) that urges the user to break the microcapsules of the coating portion to exert the effect, so that the user can exert the effect. The method can be easily understood, and the insect repellent effect can be surely obtained.

It is desirable that the mark portion of the absorbent article is a display reminiscent of an insect.

According to such an absorbent article, the mark portion is a display of an insect pattern or the like, which is an object for which the repellent effect is desired to be realized, so that the user can obtain the repellent effect when the mark portion is visually recognized. Can be recognized instantly. The presence of such markings encourages the user to come into contact with the coating.

It is desirable that the coated portion and the mark portion do not overlap each other in such an absorbent article.

According to such an absorbent article, since the coated portion is a portion that is actually rubbed by the user, if the coated portion and the mark portion overlap, the mark portion may be rubbed and disappear. is there. Since the coated part and the mark part do not overlap, the mark part can be maintained even if the coated part is rubbed multiple times.

It is desirable that the coated portion and the mark portion of the absorbent article have a non-overlapping portion that does not overlap with each other and an overlapping portion that overlaps with each other.

According to such an absorbent article, the overlapping of the coating portion and the marking portion causes, for example, the user to mistake the marking portion for the coating portion and rub it, resulting in no contact with the coating portion. It is less likely and makes it easier for the user to rub the coated area more reliably.

It is desirable that the mark portion of the absorbent article is provided by inkjet printing, gravure printing, or flexographic printing.

According to such an absorbent article, by providing the mark portion by inkjet printing, gravure printing, or flexographic printing, the mark portion can be formed in the existing process without preparing a separate material or the like, and the cost It leads to reduction and ease of manufacturing.

It is desirable that the absorbent article has a sheet member provided with a decorative pattern visible from the non-skin surface side of the absorbent article, and the mark portion is provided on the sheet member.

According to such an absorbent article, by providing the decorative pattern and the mark portion on the same sheet, the mark portion can be easily formed in the manufacturing process.

It is desirable that the plurality of microcapsules of the absorbent article contain a coloring agent.

According to such an absorbent article, when a physical stimulus is applied to the coated part coated with the microcapsules containing the coloring agent, the coloring agent is released and the color of the coated part changes. By changing the color of the coated part before and after the physical stimulus such as rubbing, the wearer can realize that the microcapsules are broken and the insect repellent effect is exhibited.

=== Embodiment ===
As the absorbent article of the present invention, an embodiment will be described by taking a so-called tape-type deployable disposable diaper as an example. However, the present invention is not limited to this, and the application is also applicable to absorbent articles such as pants-type disposable diapers, urine absorbing pads, sanitary napkins, pantyliners, and animal disposable diapers.

=== About the configuration of disposable diaper 1 ===
The disposable diaper 1 is a so-called tape type (open type) deployable disposable diaper (hereinafter, also simply referred to as "diaper 1"). Although the diaper 1 is described as a disposable diaper for infants, it may be a disposable diaper for adults.

FIG. 1 is a plan view of the skin side of the diaper 1 in the unfolded state and the stretched state. FIG. 2 is a non-skin side plan view of the diaper 1 in an unfolded and stretched state. The unfolded state of the diaper 1 means a state in which the entire diaper 1 is unfolded in a plane. The stretched state of the diaper 1 is a state in which the wrinkles formed on the diaper 1 are stretched to the extent that they are substantially invisible, and the dimensions of each member (for example, the top sheet 3 described later) constituting the diaper 1 are large. The diaper 1 is in a stretched state until the length of the member is equal to or close to the size of the single member. 1 and 2 show a state in which the diaper 1 is taken out from the packaging material (not shown), unfolded, and stretched.

In the unfolded and stretched state shown in FIG. 1 and the like, the diaper 1 has a longitudinal direction, a width direction, and a thickness direction orthogonal to each other. The "longitudinal direction" in the unfolded and extended state corresponds to the "vertical direction" in the natural state and the packaged state. The thickness direction is the direction in which the members constituting the diaper 1 are laminated, and the side in contact with the wearer is referred to as the "skin side" and the opposite side is referred to as the "non-skin side".

In FIG. 1 and the like, the center line CC is the center in the width direction, and the diaper 1 has a shape symmetrical with respect to the center line CC. The center line CL is the center in the longitudinal direction. The diaper 1 has a front waist circumference portion 1A, a rear waist circumference portion 1B, and a crotch lower portion 1C. The front waist circumference portion 1A is a portion to be located around the front waist circumference (ventral side) of the wearer. Further, the rear waist circumference portion 1B is a portion to be located around the rear waist circumference (dorsal side) of the wearer. The inseam 1C is a portion to be located between the front waist circumference 1A and the rear waist circumference 1B.

The diaper 1 has an absorber 2 that absorbs excrement such as urine, a liquid-permeable top sheet 3 that covers the absorber 2 from the skin side, and a liquid-impermeable leak-proof that covers the absorber 2 from the non-skin side. It has a sheet 4, a back sheet 5 that covers the leak-proof sheet 4 from the non-skin side to form the outer shape of the diaper 1, and a pair of side sheets 6 provided side by side in the width direction on the top sheet 3. ing.

The top sheet 3 can be an air-through non-woven fabric or the like, the leak-proof sheet 4 can be a resin film such as a polyethylene film, and the back sheet 5 can be a flexible sheet such as a spunbonded non-woven fabric.

The absorber 2 has a rectangular shape that is long in the longitudinal direction in a plan view, and has an absorbent core (not shown) and a core wrap sheet (not shown) that covers the outer peripheral surface of the absorbent core. The absorbent core is formed by molding a liquid absorbent material into a predetermined shape, and has a substantially hourglass shape in a plan view. However, the shape of the absorbent core is not limited to this, and may be rectangular. Examples of the liquid-absorbent material include those in which a liquid-absorbent fiber such as pulp fiber contains a highly absorbent polymer (so-called SAP). Examples of the core wrap sheet include a liquid-permeable tissue and a non-woven fabric, but the absorber may not have the core wrap sheet.

Further, the diaper 1 is provided with elastic members 61 (for example, rubber threads) that can be expanded and contracted in the longitudinal direction together with the side sheets 6 on both sides in the width direction to form a pair of three-dimensional gathers as a leak-proof wall. The elastic member 61 is fixed to the side sheet 6 in a state of being extended in the longitudinal direction. By providing three-dimensional gathers, the risk of excrement leaking from the width direction of the diaper 1 is reduced.

Further, a pair of elastic leg circumference elastic members 7 (for example,) that can be expanded and contracted in the longitudinal direction on both sides of the diaper 1 in the width direction along the wearer's leg circumference and at positions mainly corresponding to the wearer's inseam. Thread rubber) is provided. Specifically, as shown in FIG. 1, the leg circumference elastic member 7 is provided outside the elastic member 61 for three-dimensional gathering in the width direction in the expanded and extended state. The leg circumference elastic member 7 is fixed to the non-skin side surface of the side sheet 6 in a longitudinal direction. Therefore, in the wearing state, each side portion of the diaper 1 in the width direction fits around the wearer's legs, and leakage of excrement is suppressed.

The number, shape, material, etc. of the elastic member 61 and the leg circumference elastic member 7 are not limited to those shown in FIG. For example, the number of elastic members 61 and the number of elastic members 7 around the legs can be arbitrarily set, and from the elastic polyurethane elastic fibers in the form of threads, the elastic films formed by melting the thermoplastic elastomer resin, and the elastic fibers in the form of films. It may be an elastic non-woven fabric.

The outer shape of the unfolded diaper 1 (FIGS. 1 and 2) is approximately an hourglass shape. A pair of side flaps 20 and 30 are provided at the widthwise ends of the diaper 1 in the front waist circumference 1A, the rear waist circumference 1B, and the inseam 1C. The side flaps 20 and 30 are formed by a side sheet 6 and a back sheet 5. Further, fastening tape 40 is provided at each outer end portion in the width direction of the pair of side flaps 30 included in the rear waist circumference portion 1B.

The fastening tape 40 has a tape base material 41, a hook material 42, and a fixing portion 43. The tape base material 41 is, for example, a member of a green non-woven fabric, and has a substantially rectangular shape long in the width direction. As shown in FIG. 2, the tape base material 41 is provided with a plurality of substantially rectangular embossed portions 40E in a staggered manner over substantially the entire area of the tape base material 41. In FIG. 1, the embossed portion 40E is omitted for convenience. By providing the embossed portion 40E on the tape base material 41, the rigidity of the tape base material 41 can be increased, and a user such as a guardian who intends to wear the diaper 1 (hereinafter, also simply referred to as a "user"). ) Etc. make it easier to grasp the fastening tape 40, and the diaper 1 can be attached more easily. The hook material 42 (for example, the male member of the hook-and-loop fastener) is provided on the skin side surface of the tape base material 41 extending outward in the width direction from the side flap 30.

In order to put the diaper 1 in the wearing state, that is, in order for the wearer to put on the diaper 1, the user or the wearer himself applies the unfolded diaper 1 to the wearer, and the abbreviation in the longitudinal direction. Fold it in half at the center (around the center line CL), and fold the pair of side flaps 30 on the rear waist circumference 1B side inward in the width direction. Then, the hook material 42 provided on the fastening tape 40 is locked to the non-skin side surface of the front waist circumference portion 1A. In the diaper 1, the hook material 42 can be directly locked to the back sheet 5 by using a non-woven fabric for the back sheet 5. However, the present invention is not limited to this, and a member such as a female member of the hook-and-loop fastener to which the hook member 42 can be locked may be provided separately from the back sheet 5. Further, instead of the hook material 42, for example, an adhesive tape may be provided on the fastening tape 40.

Further, the diaper 1 has a coated portion coated with a plurality of microcapsules MC. Each of the plurality of microcapsules MC contains an insect repellent fragrance. Further, the diaper 1 has a mark portion indicating the coating portion. Details of the coating part and the mark part will be described later.

Insect repellent is a repellent (insect repellent) against pests such as mosquitoes, silkworms, chironomids, and flies, and is a fragrance for synthetic compounds and natural plant extracts. For example, citronellal, DEET (N, N-diethyl-3-methylbenzamide), sesquiterpene, ethyl ethylbutylacetylaminopropionate, picaridin, pyrethroid, cinnamon, rosemary, lavender, peppermint, eucalyptus and the like can be used. The insect repellent fragrance can be selected according to the target pest and the person to be worn.

The microcapsule MC has a diameter of 1 to 1,000 μm and means a capsule having a space containing a core material (in this embodiment, an insect repellent fragrance). The external shape of the microcapsule MC is not particularly limited as long as it can contain the core material and control the release of the core material, and examples thereof include an external shape such as a spherical shape and an irregular shape. Further, the microcapsule MC may be a mononuclear type having one space for holding the core material or a polynuclear type having a plurality of spaces for holding the core material. Examples of the shape of the space include a spherical shape, an irregular shape, and the like.

In the microcapsule MC, the film containing the core material (also called the wall material, etc.) changes due to physical or chemical stimuli, and the contained components are released. Examples of the physical stimulus include applying heat, physical pressure, physical shock, vibration, light, and the like to the film of the microcapsule MC. Examples of the chemical stimulus include contact between a liquid (aqueous solution) such as a body fluid and the film of the microcapsule MC.

By applying these physical or chemical stimuli to the film of the microcapsule MC, deterioration, denaturation, softening, porosification, dissolution, disintegration, decomposition, etc. of the film can occur. As a result, the release of the core material in the microcapsule MC can be started, or if the core material is gradually released before stimulation, the degree of the release can be accelerated.

As the material of the microcapsule MC, an inorganic material or an organic material can be used, and for example, saccharides, monosaccharides (for example, glucose), disaccharides (for example, sucrose), polysaccharides (for example, dextrin, etc.) can be used. Glucomannan, sodium alginate, water-soluble starch, etc.), gelatin, gelatin / Arabic rubber, water-soluble polymer (for example, polyvinyl alcohol, polyvinyl acetate, etc.), melamine resin, urea / formalin resin, urethane resin, polystyrene, ethyl cellulose, polyamide , Polyacrylic acid, silicone resin, carboxymethyl cellulose and the like.

It is preferable to select the material of the microcapsule MC according to the physical characteristics of the core material and the environment and conditions in which the release of the core material is desired. In the diaper 1 of the present embodiment, microcapsules made of urethane resin having a film thickness of 2 μm are used as the microcapsule MC, and citronellal is used as the insect repellent fragrance. This citronellal has a medicinal herbal aroma and is also a scent that easily impresses with its insect repellent effect. In particular, as the capsule, it is preferable to use a capsule that disintegrates by a physical stimulus such as urethane resin.

The coated part is coated with microcapsules together with a predetermined solvent. The microcapsule MC is preferably insoluble in the solvent and preferably does not swell in the solvent which is the dispersion medium of the microcapsule MC. This is from the viewpoint of protecting the core material contained therein. The solvent for dispersing the microcapsules, together with the insect repellent fragrance, may be referred to as the first solvent in order to distinguish it from the second solvent that can be encapsulated in the microcapsules.

The microcapsule MC has a solvent solubility of preferably 1.0 g or less, more preferably 0.5 g or less, and further preferably 0.1 g or less with respect to 100 g of the solvent which is the dispersion medium of the microcapsules at 25 ° C. .. For solvent solubility, at 25 ° C., 1.0 g (0.5 g, 0.1 g, etc.) of the sample was added to 100 g of the solvent, allowed to stand for 24 hours, and lightly stirred as necessary, and then the sample was prepared. It is evaluated by visually evaluating whether or not it has dissolved.

The solvent shall be one that retains the insect repellent fragrance while being encapsulated in the microcapsules and retains the functional component, that is, one that dissolves the functional component but does not dissolve or swell the microcapsules. Is preferable.

The amount of insect repellent fragrance released can be changed depending on the amount, its vapor pressure, the degree of damage of the microcapsules to physical stimuli, the thickness of the microcapsule layer, the particle size of the microcapsules, and the like.

=== About the coating department ===
FIG. 3 is an enlarged view of the coating portion R and schematically shows the state of the plurality of microcapsules MC. FIG. 4 is an enlarged view of a portion X in FIG.

The coating department is provided at any place in the entire diaper 1. In the present embodiment, the coating portion R is provided on the non-skin side surface of the pair of fastening tapes 40 (hatched portions in FIGS. 2 and 4). As shown in FIG. 3, in the coating portion R, the microcapsules MC are coated so as to be entangled with the non-woven fabric fibers 45 of the tape base material 41 of the fastening tape 40. Further, the tape base material 41 is preferably hydrophilic so that the microcapsules MC are easily entangled with each other.

The diaper 1 is in a state where it is taken out from the packaging material (not shown), and the fastening tape 40 is folded at the tape fold line (fold line portion) TL. Then, as shown in FIG. 4, the coating portion R of the present embodiment is coated in a planar shape from the outer end in the width direction of the tape base material 41 on which a plurality of embossed portions 40E are formed in advance to the tape folding line TL. ing. The coating pattern of the coating portion R is not limited to this, and may be applied, for example, in a planar shape, a linear shape, a spiral shape, a Z shape, a linear shape, a dot shape, or the like. Further, the coating portion R may be applied to the inside in the width direction of the tape folding line TL or substantially the entire area of the tape base material 41.

Normally, the pair of fastening tapes 40 is a portion that the user always touches and grasps with a finger when wearing the diaper 1, and by providing a coating portion R coated with the microcapsule MC in such a location. , The microcapsules can be efficiently rubbed to make them easier to break. As a result, when the diaper is worn, the user can easily develop the insect repellent effect.

=== About the mark part ===
When wearing the diaper 1, it is possible to break the microcapsules and release the insect repellent fragrance by grasping the coating part R as described above, but the user is subject to physical stimuli such as rubbing the coating part R. Further, the insect repellent fragrance is further released, and the insect repellent effect can be further obtained. For that purpose, it is preferable that the diaper 1 has a mark portion indicating the coating portion R so that the user can more recognize the position of the coating portion R. The presence of the mark makes it easier for the user to directly rub the coated portion of the microcapsule, and such a physical stimulus causes the microcapsule to be newly broken and efficiently release the insect repellent fragrance. By breaking the microcapsules themselves at a desired timing such as when wearing or while wearing, the amount of fragrance can be adjusted by the user himself, and the insect repellent effect can be further exhibited.

The coating portion R coated with a plurality of microcapsules has a coating color different from that of the surroundings, and the mark portion M is formed by the different colors. The above-mentioned "colors are different" means colors having a visually identifiable relationship with each other. Specifically, the colors may have hue numbers separated by 3 or more on the Ostwald color wheel. In the present embodiment, the color of the pair of fastening tapes 40 is different from the color of the coating portion R. Specifically, the fastening tape 40 is green by using the tape base material 41 made of a green non-woven fabric, whereas the coating color of the coating portion R is white, and the user is affected by the color contrast. Makes it easier to recognize the position of the coating portion R. Further, since the coating portion R is conspicuous, the coating portion R itself can be the mark portion M. As a result, the wearer can surely touch the coating portion R and easily break the microcapsules efficiently. Further, if the color is white or the like as described above, the coated portion R can be easily visually recognized even in a dark place, and a physical stimulus can be given even in a dark place to easily exhibit an insect repellent effect. The color of the tape base material 41 and the color of the coated portion R are not limited to this.

Further, it is preferable that the color of the pair of fastening tapes 40 is different from the color of the side flaps 30. Since the fastening tape 40 has a color different from the color of the side flap 30 (for example, white), the fastening tape 40 becomes conspicuous, and the user can easily recognize the position of the fastening tape 40 instantly. It will be easier to touch. Thereby, the microcapsules can be broken efficiently.

Further, it is preferable that the color of the pair of fastening tapes 40, the color of the side flaps 30, and the color of the coated portion R are different from each other. Each member can be made to stand out by different colors of the side flap 30, the fastening tape 40 joined to the side flap 30, and the coating portion R provided in the fastening tape 40. In particular, the fastening tape 40 stands out because the colors of the side flap 30 and the fastening tape 40 extending from the outer end of the side flap 30 in the width direction are different, and the color of the coating portion R is also different, so that the coating is applied. The location of the work part R can be made more prominent. Further, as described above, since the coating portion R has a color such as white, the coating portion R can be easily visually recognized as the mark portion M even in a dark place, and the insect repellent effect can be exhibited.

FIG. 5 is an enlarged view showing another example of the coating unit R. The coated portion color of the coated portion R shown in FIG. 5 has a dark portion R1 and a light portion R2 whose color is lighter than that of the dark portion R1. Here, the color difference between the dark portion R1 and the light portion R2 is a difference that can be perceived by the naked eye. Regarding the "color difference", color measurement is performed on two points (two areas) to be measured using a commercially available colorimeter, and the color is based on the CIE1976 (L * a * b *) color space specified in JISZ8729 or the like. It can be obtained by comparing the quantified values. The color difference (ΔE * ab) between the two colors is preferably 1.0 or more so that a human can recognize the shade with the naked eye in the L * a * b * color system. Since the color of the coated portion R of the coated portion R has a shade, the coated portion R becomes more conspicuous and easily functions as a mark portion M. In FIG. 5, the dark portion R1 and the light portion R2 extending in the longitudinal direction are alternately arranged along the width direction, but the number, arrangement, shape, etc. of the dark portion R1 and the light portion R2 are not limited to this. , Can be selected arbitrarily.

Further, assuming that the dark portion R1 of the coating portion color of the coating portion R is the first portion (R1) of the coating portion R and the light portion R2 is the second portion (R2), a plurality of microcapsules in the second portion. The amount of coating per unit area of is less than the amount of coating per unit area in the first part. That is, the portion of the microcapsule with a large amount of coating forms the first portion (dark portion R1) of the coating portion R, and the portion with a small amount of coating forms the second portion (light portion R2). By forming shades by adjusting the amount of coating, it is possible to form a pattern or the like (for example, a striped pattern as shown in FIG. 5) in the coating portion R. By making the coating portion R stand out by a pattern or the like formed by such shading, the coating portion R can function as a mark M that is easy to see by itself. Further, since the light portion R2 is formed by reducing the coating amount, the coating amount can be reduced and the cost can be suppressed. Further, the amount of the microcapsules coated on the second portion (light portion R2) may be zero.

Returning to FIG. 4, in the figure, the coating portion R has a plurality of embossed portions 40E. The plurality of embossed portions 40E may have any shape such as a rhombus, a perfect circle, an ellipse, and a line, in addition to the substantially rectangular shape described above. Each of the plurality of embossed portions 40E is a concave portion, and is also a light portion R2 having a light coating color. That is, in the coating portion R, the portion other than the embossed portion 40E is the dark portion R1. Since the embossed portion 40E is the light portion R2, the depth (shadow) of the concave portion of each embossed portion is further emphasized, and the shade of the coated portion R becomes clear. Since the coating portion R is conspicuous because the plurality of embossed portions 40E look like a light-colored zigzag pattern, the coating portion R itself can function as a mark portion M.

FIG. 6 is an enlarged view showing still another example of the coating unit R. As shown in FIG. 6, the mark portion M may be a display prompting the user to touch the coating portion R. Here, the user is directly urged to perform the action by a character indicating a specific action such as "rubbing", but the picture may be touched with a finger, for example. The mark portion M is a display (characters, pictures, etc.) that urges the user to break the microcapsules of the coating portion R by a physical stimulus to exert an insect repellent effect, so that the user can understand the effect expression method. It is easy to understand, and it is easy to surely obtain the insect repellent effect.

Further, as shown in FIG. 6, here, the coating portion R and the mark portion M do not overlap each other. Since the coating portion R is a portion that is actually rubbed by the user, if the coating portion R and the mark portion M overlap, the mark portion M may be rubbed and disappear. Since the coating portion R and the marking portion M do not overlap with each other, the marking portion M can be maintained even if the coating portion R is rubbed a plurality of times.

FIG. 7 is an enlarged view showing still another example of the coating unit R. As shown in the figure, the mark portion M may be a display reminiscent of an insect. The insect means a pest, and a display reminiscent of a mosquito is preferable. Since the mark portion M is a display of an insect pattern or the like, which is an object for which the repellent effect is desired to be realized, the user can easily recognize the repellent effect instantly when the mark portion M is visually recognized. The presence of such a marker portion M further encourages the user to come into contact with the coating portion R.

Further, as shown in FIG. 7, the coating portion R and the mark portion M may have a non-overlapping portion TN that does not overlap with each other and an overlapping portion TT that overlaps with each other. Here, since the mark portion M exists in the coating portion R, the mark portion M corresponds to the overlapping portion TT. If the coating portion R and the marking portion M do not have the overlapping portion TT at all, if the user mistakenly rubs the marking portion M as the coating portion R, the microcapsules may not be easily destroyed. However, by overlapping the coating portion R and the marking portion M, the user can more reliably rub the coating portion R and can exhibit an insect repellent effect. Further, when at least a part of the mark portion M is provided outside the coating portion R (that is, when the non-overlapping portion TN also exists outside the coating portion R), the coating portion R is performed a plurality of times. Even if it is rubbed, it is possible to prevent all the mark portions M from being rubbed and disappear.

=== Other embodiments ===
The above-described embodiment is for facilitating the understanding of the present invention, and is not for limiting the interpretation of the present invention. It goes without saying that the present invention can be modified or improved without departing from the spirit thereof, and the present invention includes an equivalent thereof.

In the above-described embodiment, the coating portion R itself can be made to function as the mark portion M by using the color of the coating portion R, the shade of the coating portion color, and the like, but the present invention is not limited to this. For example, the mark portion M may be provided at a position visible from the fastening tape 40 or the back sheet 5 side by inkjet printing, gravure printing, or flexographic printing. By providing the mark portion M by such a printing method, the mark portion M can be formed in the existing process without preparing a separate material or the like, which leads to cost reduction and ease of manufacturing.

Further, the diaper 1 may have a predetermined decorative pattern on the non-skin surface side of the diaper 1. As an example, FIG. 8 is a diagram showing a state in which a diaper 1 having a decorative symbol 50 is worn. As shown in FIG. 8, the diaper 1 has a sheet member 4A provided with a decorative pattern 50 visible from the non-skin surface side of the diaper 1, and the mark portion M is provided on the sheet member 4A. Good. The sheet member 4A may be the leak-proof sheet 4 in the above-described embodiment. Here, a mark in which arrows / letters (“tape rubbing”) and insects (mosquitoes, for example) that urge the coating portion R provided on the fastening tape 40 to be rubbed is mixed as the mark portion M. It is provided on the sheet member 4A together with the decorative symbol 50. By providing the decorative symbol 50 and the mark portion M on the same sheet (sheet member 4A) in this way, the mark portion M can be easily formed at the same time as the decorative symbol 50 in the manufacturing process. As in this example, the mark portion M provided on the sheet member 4A is arbitrary as long as it reminds us of the existence of the coating portion R or encourages the user to touch the coating portion R. You can select the characters and pictures of.

In the above-described embodiment, the plurality of microcapsules MC contain an insect repellent fragrance, but a color former may be included together with the fragrance. A color former is a substance (agent) that develops color by reacting with a developer. It may be a single compound or a mixture. Further, the color former enclosed in the microcapsules may be a single color or a multicolor.

As the color-developing agent in the present invention, for example, a known electron-donating color-developing agent generally used in pressure-sensitive paper or the like can be used, and blue such as crystal violet lactone and 3,6-bis-diphenylaminofluorane can be used. Black color formers such as 2-anilino-3-methyl-6-N-methyl-pentylaminofluorane, 2-anilino-3-chloro-6-dimethylfluorane, 2-chloro-3-methyl Red colorants such as -6-diethylaminofluorane and 1,2-benzo-6-diethylaminofluorane, greens such as 2-dibenzylamino-6-diethylaminofluorane and 2-octylamino-6-diethylaminofluorane. Examples thereof include, but are not limited to, system color formers.

Specifically, as the color developer, for example, a known electron-accepting color developer generally used in pressure-sensitive paper or the like can be used, and a phenol resin compound, a salicylic acid-based metal chloride, or a salicylic acid resin-based developer can be used. Examples thereof include metal oxides and solid acid compounds, but the present invention is not limited thereto.

When a physical stimulus is applied to the coating part R due to the inclusion of the coloring agent in the microcapsules, the coloring agent is released from the capsule together with the fragrance and the color of the coating part R changes. By changing the color of the coated portion R before and after the physical stimulus such as rubbing, the wearer can realize that the microcapsules are broken and the insect repellent effect is exhibited.

In the above-described embodiment, the coating portion R is provided on the non-skin side surface of the fastening tape, but the present invention is not limited to this. A coating portion can be provided on any part of the entire area of the diaper 1 depending on the wearing condition and the like. When an insect repellent fragrance is used as in diaper 1, it is preferably provided on the non-skin side surface of diaper 1 for the purpose of preventing insects from the outside.

In the above-described embodiment, the fastening tape 40 is provided as a member different from the back sheet 5 and the side sheet 6, but the present invention is not limited to this. For example, the back sheet 5 and the side sheet 6 may be used to form the fastening tape 40.

In the above-described embodiment, the microcapsules contain an insect repellent fragrance having a medicinal herbal fragrance, but the microcapsules include not only an insect repellent fragrance but also a warming agent having a warming component and a cooling sensation component. A substance having a well-known functional ingredient such as a cooling sensation agent, a deodorant having a deodorant component, an antibacterial agent having an antibacterial function, and a skin care agent having a skin care component may be included.

1 diaper (absorbent article), 1A front waistline, 1B rear waistline, 1C inseam,
2 Absorbent, 3 Top sheet, 4 Leakage-proof sheet, 4A sheet member,
5 back seat, 6 side seat, 7 elastic member around the leg,
20 side flaps, 30 side flaps,
40 fastening tape, 41 tape base material, 40E embossed part,
42 hook material, 43 fixing part, 45 non-woven fiber, 50 decorative pattern,
61 Elastic member, M mark,
MC microcapsules, R coating part, R1 dark part, 1st part,
R2 light part, second part, S side end part, TN non-overlapping part, TT overlapping part

Claims

An absorbent article having a coated portion coated with a plurality of microcapsules.
Each of the plurality of microcapsules contains an insect repellent fragrance.
An absorbent article having a mark portion indicating the coated portion.
The absorbent article according to claim 1.
An absorbent article characterized in that the coated portion has a coating color different from that of the surroundings and forms the mark portion.
The absorbent article according to claim 2.
The coating color is an absorbent article characterized by having a dark portion and a light portion having a lighter color than the dark portion.
The absorbent article according to claim 3.
The coating portion has a plurality of embossed portions and has a plurality of embossed portions.
The absorbent article, wherein the plurality of embossed portions are the light portions.
The absorbent article according to claim 3.
The coating portion has a first portion and a second portion.
The amount of coating per unit area of the plurality of microcapsules in the second part is smaller than the amount of coating per unit area in the first part.
The first portion is the dark portion.
The second portion is an absorbent article characterized by being the light portion.
The absorbent article according to claim 1.
It has a front waistline, a rear waistline, and an inseam located between the front waistline and the rear waistline.
Side flaps are provided at the widthwise ends of the absorbent article around the rear girth.
A pair of fastening tapes are provided on the side flaps.
The coated portion is an absorbent article, which is provided on the pair of fastening tapes.
The absorbent article according to claim 6.
An absorbent article characterized in that the color of the pair of fastening tapes is different from the color of the side flaps.
The absorbent article according to claim 6 or 7.
An absorbent article characterized in that the color of the pair of fastening tapes is different from the color of the coated portion.
The absorbent article according to claim 7 or 8.
An absorbent article characterized in that the color of the pair of fastening tapes, the color of the side flaps, and the color of the coated portion are different from each other.
The absorbent article according to any one of claims 1 to 9.
The mark portion is an absorbent article characterized in that it is a display prompting the user to touch the coated portion.
The absorbent article according to any one of claims 1 to 10.
The mark portion is an absorbent article characterized by a display reminiscent of an insect.
The absorbent article according to claim 1.
An absorbent article characterized in that the coated portion and the mark portion do not overlap each other.
The absorbent article according to claim 1.
An absorbent article characterized in that the coated portion and the marking portion have a non-overlapping portion that does not overlap with each other and an overlapping portion that overlaps with each other.
The absorbent article according to any one of claims 1 to 3, 12, and 13.
The mark portion is an absorbent article characterized in that it is provided by inkjet printing, gravure printing, or flexographic printing.
The absorbent article according to any one of claims 1 to 3 and 12 to 14.
It has a sheet member provided with a decorative pattern that can be visually recognized from the non-skin surface side of the absorbent article.
The mark portion is an absorbent article, which is provided on the sheet member.
The absorbent article according to claim 1.
The plurality of microcapsules are absorbent articles characterized by containing a color former.