CN114206282A - Absorbent article - Google Patents

Abstract

The absorbent article (1) has an application section (R) coated with a plurality of Microcapsules (MC). Each of the plurality of Microcapsules (MC) contains an insect-repellent fragrance and has a marking portion (M) indicating the application portion (R).

Description

Absorbent article

Technical Field

The present invention relates to an absorbent article.

Background

Disposable diapers having an absorbent body that absorbs excrement are used not only for nurturing infants and nursing adults but also for caring for pets.

Further, patent document 1 discloses an absorbent article capable of preventing pests from entering the absorbent article by providing pest-resistant microcapsules in which natural plant extracts exerting a pest-resistant effect are encapsulated in microcapsules.

Documents of the prior art

Patent document

Japanese Kohyo publication No. 2012-522618

Disclosure of Invention

Problems to be solved by the invention

As described in patent document 1, releasing the fragrance contained in the capsules during transportation and storage of the absorbent article makes it possible to prevent the invasion of insects. However, as the release proceeds, there is caused a risk that it is difficult to control the amount of the perfume and to ensure the effective ingredient when the absorbent article is used by the wearer.

The present invention has been made in view of the above-mentioned problems, and it is an aspect of the present invention to provide an absorbent article which allows a user to adjust the amount of perfume himself or herself and can exert an insect repellent effect at a desired time when wearing the absorbent article or during use.

Means for solving the problems

A main aspect of the present invention for achieving the above object is an absorbent article comprising: an application section coated with a plurality of microcapsules each encapsulating an insect-repellent fragrance, the absorbent article having a marking section indicating the application section.

Features of the present invention other than those described above will become apparent by reading the description of the present specification with reference to the accompanying drawings.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, the amount of fragrance can be adjusted by the user himself or herself when putting on the absorbent article or at a desired time during use, and the insect-repellent effect can be exerted more easily.

Drawings

Fig. 1 is a plan view of a diaper 1 in an unfolded and stretched state as viewed from the skin side.

Fig. 2 is a plan view of the diaper 1 in a developed and stretched state, viewed from the non-skin side.

Fig. 3 is an enlarged view of the coating portion R and schematically shows the state of a plurality of microcapsules MC.

Fig. 4 is an enlarged view of the X portion in fig. 2.

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 how to wear the diaper 1 having the decorative graphic 50.

Detailed Description

The description of the present specification and the accompanying drawings will make at least the following matters clear.

An absorbent article, comprising: an application section coated with a plurality of microcapsules each encapsulating an insect-repellent fragrance, the absorbent article having a marking section indicating the application section.

According to the above-mentioned absorbent article, the presence of the marking portion makes it easier for the user to directly rub the microcapsule coating portion, and the physical stimulus caused by the rubbing can newly destroy the microcapsule, so that the insect-repellent fragrance can be effectively discharged. In this way, by the user breaking the microcapsules at the time of putting on the absorbent article or at a desired time during use, it is possible to adjust the amount of the perfume by the user himself, and exert the insect repellent effect.

In the absorbent article, it is desirable that the coating portion has a coating color different from the surrounding color, and the coating color forms the marking portion.

According to the absorbent article described above, the color of the microcapsule coating portion is different from the surrounding color, which makes the coating portion noticeable. As a result, the application section becomes more easily recognizable to the user, and the application section itself can function as the marking section.

In the absorbent article, it is desirable that the coating color has a heavy portion and a light portion, the light portion being lighter in color than the heavy portion.

According to the absorbent article described above, the coating color has a light/heavy hue difference, and therefore the coated portion becomes more noticeable and functions as a marking portion.

In the absorbent article, it is desirable that the applying portion has a plurality of embossed portions, and each of the plurality of embossed portions is the light portion.

According to the absorbent article, the plurality of embossed portions are all concave portions, and the embossed portions are light portions having a light coating color. This further emphasizes the depth (shading) of the embossed depressions and makes the light/heavy hue difference of the coated portion noticeable. This makes the coated portion more noticeable.

In the absorbent article, it is desirable that the coating section has a first section and a second section, the coating amount of the plurality of microcapsules per unit area in the second section is smaller than the coating amount of the plurality of microcapsules per unit area in the first section, the first section is the heavy section, and the second section is the light section.

According to the absorbent article, the heavy portion of the coating portion is formed by the portion having a large coating amount of the microcapsules, and the light portion is formed by the portion having a small coating amount. Generating the light/heavy tone difference by adjusting the coating amount in this way makes it possible to form a pattern or the like in the coating portion using the light/heavy tone difference. This makes the coated portion noticeable. Further, since the light portion is formed by reducing the coating amount, the coating amount of the microcapsule can be reduced.

In the absorbent article, it is desirable that the absorbent article further includes: a front waist portion; the back waist part; and a crotch portion located between the front waist portion and the rear waist portion, wherein a side flap is provided at each end in the width direction of the absorbent article at the rear waist portion, a pair of fastening tapes are provided in the side flap, and the application portion is provided in the pair of fastening tapes.

According to the absorbent article described above, since the fastening tape is a portion that must be touched and pinched by a user's finger when putting on the absorbent article, providing the coating portion coated with the microcapsules at such a position can make the microcapsules more easily rubbed and destroyed effectively. This makes it easier to exert an insect repellent effect during use.

In the absorbent article, it is desirable that the pair of fastening tapes have a color different from that of the side flaps.

According to the absorbent article described above, since the color of the pair of fastening tapes is different from the color of the side flaps, the fastening tapes become more noticeable. This makes it easier for the user to immediately identify the position of the fastening band.

In the absorbent article, it is desirable that the pair of fastening tapes have a color different from that of the application section.

According to the above-described absorbent article, as for the coating portion of the fastening tape coated with the microcapsules, the color thereof is made different from the color of the fastening tape, which makes it easier for the user to recognize the position of the coating portion. This makes it easier for the wearer to reliably touch the coated portion, and makes it possible to efficiently destroy the microcapsules. Further, the coating portion can be used as a mark portion which is noticeable even in a dark place or the like depending on the color tone of the coating portion, which makes it possible to impart physical stimulation to the coating portion even in a dark place, exerting an insect repellent effect.

In the absorbent article, it is desirable that the color of the pair of fastening tapes, the color of the side flap, and the color of the applying section are different from each other.

According to the absorbent article described above, since the side flaps, the fastening tape joined to the side flaps, and the application section provided in the fastening tape are different in color from each other, these members can be made noticeable. In particular, the fastening tape is obvious because the color of the side flap and the fastening tape are different from each other. In addition, since the color of the coating portion is different, the position of the coating portion can be made more conspicuous. Further, the coating portion functions as a marking portion according to the color tone of the coating portion, so that the insect repellent effect can be exerted even in a dark place.

In the absorbent article, it is desirable that the marking portion is a mark that prompts the user to touch the application portion.

According to the absorbent article, since the mark portion is a mark (for example, characters or pictures) that prompts the user to destroy the microcapsules of the application portion to exert an effect, the user can easily understand the method of exerting the effect and easily and reliably obtain the insect repellent effect.

In the absorbent article, it is desirable that the mark portion is a mark that reminds the user of insects.

According to the above-described absorbent article, since the mark portion is a graphic mark of an insect that is a target of the insect-repellent effect, the insect-repellent effect can be immediately recognized when the user visually recognizes the mark portion. Due to the presence of such a marking portion, the user is further prompted to come into contact with the application portion.

In the absorbent article, it is desirable that the applying portion and the marking portion do not overlap with each other.

According to the absorbent article, since the application part is a part actually rubbed by the user, when the application part and the marking part overlap each other, there is a risk that the marking part disappears due to being rubbed. Since the coating portion and the marking portion do not overlap each other, the marking portion can be maintained even when the coating portion is rubbed a plurality of times.

In the absorbent article, it is desirable to provide a non-overlapping portion that is a portion where the application portion and the marking portion do not overlap with each other, and an overlapping portion that is a portion where the application portion and the marking portion overlap with each other.

According to the absorbent article described above, since the applying portion and the marking portion overlap each other, it is less likely that the user will not come into contact with the applying portion due to, for example, rubbing the marking portion by mistake as the applying portion. This makes it easier for the user to rub the coated portion more reliably.

In the absorbent article, it is desirable that the mark portion is provided by any one of inkjet printing, gravure printing, and flexographic printing.

According to the absorbent article, the mark portion can be formed in a conventional process without preparing other materials or the like by providing the mark portion by ink jet printing, gravure printing, or flexographic printing. This results in cost reduction and ease of manufacture.

In the absorbent article, it is desirable that the absorbent article further includes a sheet member having a decorative pattern visually recognizable from the non-skin surface side of the absorbent article, and the mark portion is provided on the sheet member.

According to the absorbent article described above, providing the decorative pattern and the mark portion on the same sheet makes it easier to form the mark portion in the manufacturing process.

In the absorbent article, it is desirable that each of the plurality of microcapsules encapsulates a color former.

According to the above-described absorbent article, when the coated portion coated with the microcapsule containing the color former is subjected to physical stimulation, the color former is released and the color of the coated portion is changed. By changing the color of the coated portion before and after a physical stimulus such as friction, the wearer can recognize that the microcapsules are destroyed and exert an insect-repellent effect.

Embodiments of the present invention are described in detail below with reference to the accompanying drawings

As an example of the absorbent article according to the present invention, an embodiment will be described using a so-called tape-type open-type disposable diaper. However, the present invention is not limited thereto, and the present invention is also applicable to absorbent articles such as pants-type disposable diapers, urine absorption pads, sanitary napkins, panty liners, animal disposable diapers, and the like.

Disposable diaper 1 has a structure of

The disposable diaper 1 is a so-called tape-type (open-type) disposable diaper (hereinafter also simply referred to as "diaper 1"). The diaper 1 will be described as a disposable diaper for infants, but may also be a disposable diaper for adults.

Fig. 1 is a plan view of the diaper 1 in a developed and extended state as viewed from the skin side. Fig. 2 is a plan view of the diaper 1 in a developed and extended state, viewed from the non-skin side. The developed state of the diaper 1 refers to a state in which the entire diaper 1 is developed flat. The extended state of the diaper 1 refers to a state in which the diaper 1 is extended so that wrinkles in the diaper 1 are substantially no longer visible, and a state in which the diaper 1 has been extended so that the dimensions of its constituent members (e.g., a topsheet 3 described later) coincide with or are close to the dimensions of the members themselves. Fig. 1 and 2 show the diaper 1 in a state in which it is taken out of a packaging material (not shown), unfolded and stretched.

In the unfolded and extended state as 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. Note that the "longitudinal direction" in the unfolded and elongated state corresponds to the "up-down direction" in the natural state and the packaged state. The thickness direction refers to a direction in which the constituent members of the diaper 1 overlap each other. The side in contact with the wearer will be referred to as the "skin side", and the side opposite to the skin side will be referred to as the "non-skin side".

In fig. 1 and the like, the center line C-C is the center in the left-right direction, and the diaper 1 has a shape that is left-right symmetrical about the center line C-C. The center line CL is the center in the longitudinal direction. The diaper 1 includes a front waist portion 1A, a rear waist portion 1B, and a crotch portion 1C. The front waist portion 1A is a portion located at the front (ventral) of the wearer. The rear waist portion 1B is a portion located at the rear (back side) of the wearer. The crotch portion 1C is a portion located between the front waist portion 1A and the rear waist portion 1B.

The diaper 1 comprises: an absorbent body 2 that absorbs excreted fluid such as urine; a liquid-permeable top sheet 3 that covers the absorbent body 2 from the skin side; a liquid-impermeable leakproof sheet 4 covering the absorbent body 2 from the non-skin side; a back sheet 5 that covers the leakproof sheet 4 from the non-skin side and forms the outer shape of the diaper 1; and a pair of side sheets 6 provided side by side in the width direction on the front sheet 3.

The front sheet 3 may be made of a breathable nonwoven sheet or the like, the leakage preventing sheet 4 may be made of a resin film such as a polyethylene film, and the back sheet 5 may be made of a flexible sheet such as a spunbonded nonwoven sheet.

The absorbent body 2 has a rectangular shape long in the longitudinal direction in a plan view, and includes an absorbent core (not shown) and a core wrap sheet (not shown) covering the outer peripheral surface of the absorbent core. The absorbent core is obtained by molding a liquid absorbent material into a predetermined shape, and has a substantially hourglass shape in plan view. However, the shape of the absorbent core is not limited thereto, and a rectangular shape may be used. As one example, the liquid absorbent material may be made of liquid absorbent fibers (e.g., pulp fibers) containing super absorbent polymers (so-called SAP) or the like. The core wrap sheet is, for example, a liquid-permeable tissue paper or nonwoven fabric sheet. But a construction in which the absorbent body does not have a core wrap sheet is also acceptable.

Further, the diaper 1 includes side sheets 6 and elastic members 61 (e.g., elastic threads) in both side portions in the width direction, and the elastic members 61 are stretchable in the longitudinal direction. The side sheet 6 and the elastic member 61 constitute a pair of three-dimensional gathers serving as leakage preventing walls. The elastic member 61 is fixed to the side sheet 6 in a state of being elongated in the longitudinal direction. Providing the three-dimensional gathers reduces the risk of leakage of waste from the width direction of the diaper 1.

In addition, a pair of leg elastic members 7 (e.g., elastic threads) which are stretchable in the longitudinal direction are provided at positions corresponding mainly to the crotch portion of the wearer in both side portions in the width direction of the diaper 1 so as to conform to the legs of the wearer. Specifically, as shown in fig. 1, in the unfolded and extended state, the leg elastic member 7 is disposed on the widthwise outer side of the elastic member 61 for three-dimensional gather. The leg elastic members 7 are fixed to the non-skin side of the side sheet 6 in a state of being elongated in the longitudinal direction. Therefore, the side portions of the diaper 1 in the width direction are fitted around the legs of the wearer in the worn state, and leakage of excrement is suppressed.

The number, shape, material, and the like of the elastic members 61 and the leg elastic members 7 are not limited to those shown in fig. 1 and the like. For example, the number of the elastic members 61 and the leg elastic members 7 may be arbitrarily set. These elastic members may be made of a string-like polyurethane stretchable fiber, a stretchable film in which a thermoplastic elastomer resin is melted to form a film, or a stretchable nonwoven fabric sheet made of a stretchable fiber.

In the unfolded state (fig. 1 and 2), the diaper 1 has a substantially hourglass-shaped form. The front waist portion 1A, the rear waist portion 1B and the crotch portion 1C have a pair of side flaps 20 and 30 at the widthwise ends of the diaper 1. The side flaps 20 and 30 are formed by the side sheet 6 and the back sheet 5. Further, a fastening tape 40 is provided at the widthwise outer ends of the pair of side flaps 30 of the rear waist portion 1B.

The fastening tapes 40 each include a tape base 41, a hook member 42, and a fixing portion 43. The band base material 41 is, for example, a green nonwoven fabric member, and is formed substantially in a rectangular shape that is long in the width direction. As shown in fig. 2, in the band base material 41, a plurality of embossed portions 40E each having a substantially rectangular shape are provided in a staggered arrangement over substantially the entire band base material 41. In fig. 1, the embossed portion 40E is omitted for convenience. By providing the embossed portion 40E in the tape base material 41, the rigidity of the tape base material 41 can be increased. This makes it easier for a user such as a parent (hereinafter also simply referred to as "user") who attempts to put the diaper 1 on the wearer to grasp the fastening tape 40. Therefore, the operation of wearing the diaper 1 can be performed more easily. A hook member 42 (e.g., a male member of a hook and loop fastener) is provided on the skin side of the band base material 41 extending outward in the width direction from the side flap 30.

In order to put the diaper 1 on, i.e., in a state where the wearer wears the diaper 1, the user or the wearer himself/herself arranges the diaper 1 in accordance with the wearer and folds the unfolded diaper 1 at a substantially center in the longitudinal direction (a periphery of the center line CL). Subsequently, the pair of side flaps 30 positioned on the rear waist portion 1B side are folded inward in the width direction. Then, the hook members 42 provided on the fastening tape 40 are fastened to the non-skin side of the front waist portion 1A. In the diaper 1, a nonwoven fabric sheet is used for the back sheet 5 so that the hook members 42 can be directly fastened to the back sheet 5. However, the configuration is not limited thereto. A member that can fasten the hook member 42, such as a female member of a hook and loop fastener, may be provided separately from the back surface sheet 5. Further, instead of the hook member 42, for example, an adhesive tape may be provided on the fastening tape 40.

The diaper 1 has a coated portion coated with a plurality of microcapsules MC. A plurality of microencapsulated MCs each encapsulate an insect repellent fragrance. In addition, the diaper 1 has a marking portion indicating the application portion. The coating section and the marking section will be described in detail later.

Insect repellent fragrances are insect repellents (insect repellents) against pests such as mosquitoes, gnats, non-biting midges, flies and the like, and are fragrances made from synthetic compounds or natural plant extracts. For example, citronellal, N-diethyl-3-methylbenzamide (DEET), sesquiterpenes, ethyl butyl acetaminopropionate, petasitin, pyrethroids, cinnamon, rosemary, lavender, mint, eucalyptus, and the like may be used. The insect repellent fragrance can be selected according to the target pest, the target wearer, and the like.

The microcapsule MC means a capsule having a diameter of 1 to 1000 μm and having a space for encapsulating a core material (an insect-repellent fragrance in the present embodiment). The shape of the microcapsule MC is not particularly limited as long as it can encapsulate the core material and control the discharge of the core material. Examples of the outer shape include spherical and amorphous. Further, the microcapsule MC may be a single-core capsule having one space for holding the core material, or a multi-core capsule having a plurality of spaces for holding the core material. Examples of spatial shapes include spherical and amorphous.

In the microcapsule MC, a coating film (also referred to as a wall member or the like) encapsulating a core material changes due to a physical stimulus or a chemical stimulus to discharge components encapsulated therein. Examples of the physical stimulus include application of heat, physical pressure, physical impact, vibration, light, or the like to the coating film of the microcapsule MC. Examples of the chemical stimulus include contact between a liquid (aqueous solution) such as a body fluid and a membrane of the microcapsule MC.

By applying physical or chemical stimulation to the membrane of the microencapsulated MC, deterioration, denaturation, softening, porosification, dissolution, disintegration, or decomposition of the membrane can be caused.

As a result, the core material in the microcapsule MC can start to be discharged, or if the core material is gradually discharged before stimulation, the degree of discharge can be promoted.

As a material for the microcapsule MC, an inorganic material or an organic material can be used. Examples of materials include sugars, monosaccharides (e.g., glucose), disaccharides (e.g., sucrose), polysaccharides (e.g., dextrin, glucomannan, sodium alginate, water-soluble starch), gelatin/gum arabic, water-soluble polymers (e.g., polyvinyl alcohol, polyvinyl acetate), melamine resins, urea/formalin resins, polyurethane resins, polystyrene, ethyl cellulose, polyamides, polyacrylic acid, silicone resins, carboxymethyl cellulose, and the like.

It is preferable that the material for the microcapsule MC is selected according to the physical properties of the core material and the conditions and environment in which the release of the core material is desired. In the diaper 1 of the present embodiment, microcapsules made of a polyurethane resin having a film thickness of 2 μm are used as the microcapsules MC, and citronellal is used as the insect-repellent fragrance. The citronellal has a herbal fragrance and is also a fragrance which readily produces an insect repellent impression. In particular, as the bladder, it is preferable to use a bladder that is damaged by physical stimulation, such as a urethane resin.

The microcapsules are applied to the coating portion together with a predetermined solvent. It is preferable that the microcapsule MC is insoluble in the solvent, and it is preferable that the microcapsule MC does not swell in the solvent as a dispersion medium of the microcapsule MC. This configuration is adopted in view of protecting the core material encapsulated in the microcapsules MC. It should be noted that the solvent in which the microcapsules are dispersed may be referred to as a first solvent to distinguish it from a second solvent, which may be encapsulated in the microcapsules together with the insect repellent fragrance.

The solvent solubility of the microcapsule MC at 25 ℃ with respect to 100g of the solvent as the dispersion medium of the microcapsule is preferably 1.0g or less, more preferably 0.5g or less, and even more preferably 0.1g or less. Solvent solubility was evaluated by adding a 1.0g (0.5g, 0.1g, etc.) sample to 100g of solvent at 25 ℃, allowing the mixture to stand for 24 hours, stirring gently as needed, and then visually evaluating whether the sample was dissolved.

Preferably, the solvent retains the insect repellent fragrance encapsulated in the microcapsules and also retains the functional ingredient, i.e., the solvent dissolves the functional ingredient but does not dissolve or swell the microcapsules.

The amount of the insect-repellent perfume released may vary depending on the amount, vapor pressure, damage degree of the microcapsule to physical stimulus, thickness of the layer of the microcapsule, particle diameter of the microcapsule, and the like.

Coating section, and coating method

Fig. 3 is an enlarged view of the coating portion R, and schematically shows the state of a plurality of microcapsules MC. Fig. 4 is an enlarged view of the X portion in fig. 2.

The coating section is provided at any portion of the diaper 1. In the present embodiment, the applying portion R is provided on the non-skin side surfaces (hatched portions in fig. 2 and 4) of the pair of fastening tapes 40. As shown in fig. 3, in the coating section R, the microcapsules MC are applied so as to be entangled with the nonwoven fabric fibers 45 of the tape base material 41 of the fastening tape 40. In addition, it is preferable that the tape base 41 has hydrophilicity so that the microcapsules MC are easily entangled.

In the diaper 1 in the state of the diaper taken out from the packaging material (not shown), the fastening tape 40 is folded at a tape folding line (fold line portion) TL. As shown in fig. 4, the application portions R of the present embodiment are applied in a planar manner from the widthwise outer ends of the tape base material 41 toward the tape folding line TL, and a plurality of embossed portions 40E are formed in advance in the tape base material 41. The application pattern of the coating portion R is not limited thereto, and may be a shape such as a plane, a straight line, a spiral, a zigzag, a dot, or the like. Further, the coating portion R may be applied to the widthwise inner side with respect to the tape folding line TL, or applied to substantially the entire tape base material 41.

Generally, the pair of fastening tapes 40 are portions that must be touched and pinched by the fingers of the user when putting on the diaper 1. Providing the coating portion R coated with the microcapsules MC at such a position enables the microcapsules to be more easily rubbed and broken efficiently. This makes it easier for the user to exert the insect repellent effect when putting on the diaper.

The mark section is a mark section

While pinching the coating portion R by the user may break the microcapsule to release the insect-repellent fragrance as described above when putting on the diaper 1, further application of physical stimulus such as rubbing the coating portion R by the user may further discharge the insect-repellent fragrance, so that the insect-repellent effect can be further obtained. For this purpose, it is preferable that the diaper 1 has a marking portion indicating the application portion R to make the position of the application portion R more clear to the user. The presence of the marking portion makes it easier for the user to directly rub the microcapsule coating portion, and such physical stimulation can newly destroy the microcapsule, effectively discharging the insect-repellent perfume. The amount of fragrance can be adjusted by the user himself or herself to further exert the insect repellent effect by breaking the microcapsules at the time of putting on the absorbent article or at the desired time during use.

The coating portion R coated with the plurality of microcapsules has a different coating color from the surroundings, and the marking portion M is formed with a different color tone. The above "different colors" refer to colors having a relationship that can be visually distinguished. Specifically, it is sufficient that the colors have color numbers spaced from each other by 3 or more in the ostwald color circle. In the present embodiment, the pair of fastening tapes 40 are different in color from the application section R. Specifically, while the fastening tape 40 is green due to the use of the tape base material 41 formed of the green nonwoven fabric, the coating color of the coating portion R is white. Due to the color contrast, the user easily recognizes the position of the application portion R. Further, since the coating portion R is obvious, the coating portion R itself may function as the marking portion M. This makes it easier for the wearer to reliably touch the coating portion R and effectively destroy the microcapsules. In addition, in the case where the coating portion has the above-described color tone such as white, it is easier to visually recognize the coating portion R even in a dark place, and it is easier to give physical stimulation to the coating portion even in a dark place, thereby exerting an insect repellent effect. Note that the color of the tape base material 41 and the color of the coating portion R are not limited thereto.

In addition, it is preferable that the pair of fastening tapes 40 have a color different from that of the side flaps 30. In the case where the color of the fastening tape 40 is different from the color (e.g., white) of the side flap 30, the fastening tape 40 becomes apparent. This makes it easier for the user to immediately recognize the position of the fastening tape 40, allowing the user to easily touch the fastening tape 40. This makes it possible to destroy the microcapsules effectively.

Further, it is preferable that the colors of the pair of fastening tapes 40, the color of the flap 30, and the color of the applying portion R are different from each other. This makes these members obvious because the side flap 30, the fastening tape 40 coupled to the side flap 30, and the applying part R provided in the fastening tape 40 have different colors. In particular, the color of the side flap 30 is different from the color of the fastening tape 40 extending from the widthwise outer end of the side flap 30, which makes the fastening tape 40 noticeable. In addition, since the colors of the coating portions R are different, this can make the positions of the coating portions R more conspicuous. Further, as described above, since the application part R has a color such as white as described above, this makes it easier to visually recognize the application part R as the marker part M even in a dark place, so that the insect repellent effect can be exerted.

Fig. 5 is an enlarged view showing another example of the coating portion R. The coating portion R shown in fig. 5 has a heavy portion R1 and a light portion R2 lighter in color than the heavy portion R1. Here, the color difference between the heavy portion R1 and the light portion R2 is a difference in the degree of visual perception. The "color difference" can be obtained by colorimetrically comparing two points (two regions) to be measured using a commercially available colorimeter and comparing the values in terms of CIE 1976(L a b) color space defined in JIS Z8729 and the like. In addition, in the L × a × b color system, it is preferable that the color difference (Δ E × ab) of two colors is 1.0 or more, which allows a human to visually recognize the light/heavy hue difference. The coating portion color of the coating portion R has a light/dark hue difference, and therefore the coating portion R easily becomes more noticeable and easily functions as the mark portion M. Note that, in fig. 5, both the heavy portions R1 and the light portions R2 extending in the longitudinal direction are alternately arranged in the width direction. However, the number, arrangement, shape, and the like of the heavy portions R1 and the light portions R2 are not limited thereto and may be arbitrarily selected.

In addition, in the coating section color of the coating section R, when the heavy section R1 is defined as the first section (R1) of the coating section R and the light section R2 is defined as the second section (R2), the coating amount of the plurality of microcapsules per unit area in the second section is smaller than the coating amount of the plurality of microcapsules per unit area in the first section. That is, the first portion (heavy portion R1) of the coated portion R is formed of a portion in which the coating amount of the microcapsules is large, and the second portion (light portion R2) is formed of a portion in which the coating amount of the microcapsules is small. By adjusting the coating amount in this manner to produce a light/dark tone difference, a pattern (e.g., a stripe pattern as shown in fig. 5) or the like can be formed in the coating section R using the light/dark tone difference. Since the application portion R is made noticeable by using a pattern or the like formed by such a light/dark hue difference, the application portion R itself functions as a marking portion M which is easily visually recognized. Further, since the light portion R2 is formed by reducing the amount of coating, the amount of coating can be reduced, and the cost can be reduced. In addition, the coating amount of the microcapsules in the second portion (the light portion R2) may be zero.

Returning to fig. 4, the coating section R has a plurality of embossed sections 40E in fig. 4. The plurality of embossed portions 40E may have any shape such as a diamond shape, a perfect circle shape, an oval shape, a straight line shape, and the like, other than the above-described substantially rectangular shape. The plurality of embossed portions 40E are all concave portions, and are also light portions R2 having a light application color. That is, in the coating portion R, the portion other than the embossed portion 40E is the concentrated portion R1. The embossed portion 40E is a light portion R2, which further emphasizes the depth (shading) of the embossed depressions, making the light/dark tone difference of the applied portion R noticeable. The plurality of embossed portions 40E look like a light-colored zigzag pattern, which makes the coated portions R noticeable. Therefore, the coating portion R itself can function as the marking portion M.

Fig. 6 is an enlarged view showing still another example of the coating portion R. As shown in fig. 6, the mark portion M may be a mark that prompts the user to touch the application portion R. Here, the text indicating a specific action such as "rubbing" directly prompts the user for an action, but for example, a picture indicating touching with a finger may be used. The mark portion M is a mark (such as text or picture) that prompts the user to exert the insect-repellent effect by giving a physical stimulus to destroy the microcapsules of the coating portion R, so the user can easily understand the method of exerting the effect, and easily and reliably obtain the insect-repellent effect.

Further, as shown in fig. 6, here, the coating portion R and the marking portion M do not overlap each other. The coating portion R is a portion actually rubbed by the user, and therefore, in a case where the coating portion R and the marking portion M overlap each other, there is a risk that the marking portion M disappears due to being rubbed. Since the coating portion R and the mark portion M do not overlap each other, the mark 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 portion R. As shown in fig. 7, the mark portion M may be a mark for the user to remember the insect. Insects refer to pests, and a mark that reminds a user of mosquitoes is preferably taken as an example. Since the mark portion M is a graphic mark of an insect as a target of the insect-repellent effect, the user can immediately recognize the insect-repellent effect when visually recognizing the mark portion M. Since such a mark portion M exists, the user is further prompted to touch the application portion R.

Further, as shown in fig. 7, there may be a non-overlapping portion TN where the coating portion and the mark portion do not overlap each other and an overlapping portion TT where the coating portion and the mark portion overlap each other. Here, since the mark portion M is present in the coating portion R, the mark portion M corresponds to the overlap portion TT. In the case where the coating portion R and the mark portion M do not have the overlapping portion TT at all, the microcapsule may be less likely to be broken when the user rubs the mark portion M as the coating portion R by mistake. However, by overlapping the coating portion R and the marking portion M, the user can more reliably rub the coating portion R and exert the insect repellent effect. In addition, in the case where at least a part of the mark portion M is provided outside the application portion R (i.e., in the case where the non-overlapping portion TN exists outside the application portion R), even when the user rubs the application portion R multiple times, the entire mark portion M can be prevented from being rubbed and disappearing.

In other embodiments, the invention is not limited to the specific embodiments described

Although the above embodiments of the present invention are provided to facilitate understanding of the present invention, they are not to be construed as limiting the present disclosure in any way. The present disclosure may be changed or modified in various ways without departing from the gist of the present disclosure, and the present disclosure covers equivalents thereof.

In the above embodiment, the coating portion R itself can function as the marking portion M by using the color of the coating portion R, the light/dark hue difference of the color of the coating portion, and the like. However, the present invention is not limited thereto. For example, the mark portions M may be provided at visually recognizable positions from the fastening tape 40 and the back sheet 5 side by inkjet printing, gravure printing, or flexographic printing. The mark M provided by such a printing method can be formed in a conventional process without preparing other materials or the like. This results in cost reduction and ease of manufacture.

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 how a diaper 1 having a decorative graphic 50 is worn. As shown in fig. 8, the diaper 1 may have a sheet member 4A, the sheet member 4A is provided with a decorative pattern 50, the decorative pattern 50 may be visually recognized from the non-skin surface side of the diaper 1, and the mark portion M may be provided on the sheet member 4A. The sheet member 4A may be the leakage preventing sheet 4 in the above embodiment. Here, a mark that prompts the user to rub the application portion R provided on the fastening tape 40 is provided on the sheet member 4A as the mark portion M together with the decorative pattern 50; the indicia include arrows or characters ("friction bands") and insect (e.g., mosquito) graphics. Therefore, the decorative pattern 50 and the mark portion M are provided on the same sheet (sheet member 4A), so that it is easier to form the mark portion M simultaneously with the decorative pattern 50 in the manufacturing process. Note that, as the mark portion M provided on the sheet member 4A, as in the present example, any text or picture may be selected as long as the text or picture reminds the user of the presence of the application portion R, or as long as the text or picture reminds the user of touching the application portion R or the like.

In the above embodiment, each of the plurality of microcapsules MC encapsulates the insect-repellent perfume. In addition, in addition to the perfume, the plurality of microcapsules MC may encapsulate a color former. The color former is a substance (reagent) that develops color by reacting with the developer. Mixtures may be used in addition to the individual compounds. In addition, the color former to be encapsulated in the microcapsules may be monochromatic or polychromatic.

As the color former in the present invention, for example, a known electron-donating color former generally used for pressure-sensitive paper or the like can be used. Examples thereof include: blue colorants such as crystal violet lactone and 3, 6-bis-diphenylaminofluoran; black colorants such as 2-anilino-3-methyl-6-N-methyl-pentylaminofluoran and 2-anilino-3-chloro-6-dimethylfluoran; red color formers such as 2-chloro-3-methyl-6-diethylaminofluoran and 1, 2-benzo-6-diethylaminofluoran; green colorants such as 2-dibenzylamino-6-diethylaminofluoran and 2-octylamino-6-diethylaminofluoran. But the color former is not limited thereto.

Specifically, as the color developer, for example, a known electron accepting color developer generally used for pressure sensitive paper and the like can be used. Examples thereof include: phenolic resin compounds, salicylic acid metal chlorides, salicylic acid resin metal oxides, and solid acid compounds. But the developer is not limited thereto.

In the case where the microcapsule further contains a color former, when the coating portion R is subjected to a physical stimulus, the color former is released from the capsule together with the perfume, and the color of the coating portion R changes. By changing the color of the coating portion R before and after a physical stimulus such as friction, the wearer can recognize that the microcapsules are destroyed and exert an insect-repellent effect.

In the above embodiment, the applying portion R is provided on the non-skin side of the fastening tape, but the configuration is not limited thereto. The application part may be provided at any position of the entire diaper 1 depending on the wearing state and the like. It should be noted that in the case where the insect-repellent fragrance is used as in the diaper 1, in order to prevent foreign insects, it is preferable to provide an application portion on the non-skin side of the diaper 1.

In the above embodiment, the fastening tape 40 is provided as a member different from the back surface sheet 5 and the side sheet 6, but the configuration is not limited thereto. For example, the fastening tape 40 may be formed using the back sheet 5 or the side sheet 6.

In the above embodiment, the insect-repellent fragrance having a fragrance of herbal system fragrance is microencapsulated. However, the microcapsule may encapsulate not only the insect-repellent fragrance but also a substance having a known functional ingredient, such as a warming agent having a warming ingredient, a cooling agent having a cooling ingredient, a deodorant having a deodorizing ingredient, an antibacterial agent having an antibacterial function, and a skin-care agent having a skin-care ingredient.

List of reference numerals

1: diaper (absorbent article), 1A: front waist, 1B: rear waist, 1C: the crotch part 2: absorber, 3: dough sheet, 4: leak-proof sheet, 4A: sheet member, 5: back sheet, 6: side sheet, 7: leg elastic member, 20: side flap, 30: side flap, 40: fastening tape, 41: tape base material, 40E: embossed portion, 42: hook member, 43: fixing portion, 45: nonwoven fabric, 50: decorative pattern, 61: elastic member, M: labeling moiety, MC: microcapsules, R: coating section, R1: dense portion (first portion), R2: light portion (second portion), S: side end portion, TN: non-overlapping section, TT: overlapping part

Claims (16)

1. An absorbent article comprising:

a coating section coated with a plurality of microcapsules,

the plurality of microcapsules each encapsulating an insect repellent fragrance,

the absorbent article has a marking portion indicating the application portion.

2. The absorbent article of claim 1,

the coating portion has a coating color different from a surrounding color, and,

the coating color forms the marking portion.

3. The absorbent article of claim 2, wherein,

the coating color has a heavy portion and a light portion,

the light portion is lighter in color than the heavy portion.

4. The absorbent article according to claim 3,

the coating section has a plurality of embossed sections, and,

the plurality of embossed portions are the light portions.

5. The absorbent article of claim 3, wherein

The coating section has a first portion and a second portion,

the amount of coating of the plurality of microcapsules per unit area in the second portion is less than the amount of coating of the plurality of microcapsules per unit area in the first portion,

the first portion is the dense portion, and,

the second portion is the light portion.

6. The absorbent article of claim 1,

the absorbent article further includes:

a front waist portion;

the back waist part; and

a crotch portion located at a position between the front waist portion and the rear waist portion,

a side flap is provided at each end in the width direction of the absorbent article in the rear waist portion,

a pair of fastening bands are provided in the side flaps, and

the coating portion is provided in the pair of fastening tapes.

7. The absorbent article of claim 6,

the pair of fastening strips are of a different color than the side flaps.

8. The absorbent article according to claim 6 or 7,

the pair of fastening tapes are different in color from the applying section.

9. The absorbent article according to claim 7 or 8,

the color of the pair of fastening tapes, the color of the side flap, and the color of the applying section are different from each other.

10. The absorbent article according to any one of claims 1 to 9, wherein,

the marking portion is a mark for prompting a user to touch the coating portion.

11. The absorbent article according to any one of claims 1 to 10, wherein,

the mark portion is a mark for the user to remember the insect.

12. The absorbent article of claim 1,

the coating portion and the marking portion do not overlap each other.

13. The absorbent article of claim 1,

a non-overlapping portion and an overlapping portion are provided,

the non-overlapping portion is a portion where the coating portion and the marking portion do not overlap with each other,

the overlapping portion is a portion where the coating portion and the marking portion overlap each other.

14. The absorbent article according to any one of claims 1 to 3, 12 and 13, wherein the mark portion is provided by any one of inkjet printing, gravure printing and flexographic printing.

15. The absorbent article according to any one of claims 1 to 3, 12 to 14, wherein the absorbent article further comprises a sheet member,

the sheet member has a decorative pattern visually recognizable from the non-skin surface side of the absorbent article, and,

the marking portion is provided on the sheet member.

16. The absorbent article of claim 1,

the plurality of microcapsules each encapsulate a color former.

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