CN114206282B - absorbent articles - Google Patents

Abstract

The absorbent article (1) has a coating 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 coating portion (R).

Description

absorbent articles

Technical field

The present invention relates to absorbent articles.

Background technique

Disposable diapers having an absorbent body for absorbing excrement are used not only for raising babies and caring for adults, but also for caring for pets.

Furthermore, Patent Document 1 discloses an absorbent article that can prevent pests from entering the absorbent article by providing insect-proof microcapsules in which natural plant extracts exerting an insect-proof effect are encapsulated in microcapsules.

existing technical documents

patent documents

Special Gazette No. 2012-522618

Contents of the invention

Invent the problem to be solved

As described in Patent Document 1, during transportation and storage of absorbent articles, releasing the fragrance contained in the capsule makes it possible to prevent the invasion of insects. However, as the release proceeds, there is a risk that it will be difficult to control the amount of fragrance and ensure effective ingredients when the wearer uses the absorbent article.

The present invention has been accomplished in view of the above problems, and one aspect of the present invention is to provide an absorbent article that allows a user to adjust the amount of fragrance by himself when wearing the absorbent article or at a desired time during use And it can exert an insect repellent effect.

solutions to problems

The main aspect of the present invention for achieving the above object is an absorbent article, which includes: a coating part coated with a plurality of microcapsules, and the plurality of microcapsules all encapsulate an insect repellent fragrance, and the absorbent article The sexual article has a mark portion indicating the coated portion.

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

Effect of the invention

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

Description of drawings

Fig. 1 is a plan view of the 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 an expanded and stretched state as viewed from the non-skin side.

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 part X in FIG. 2 .

FIG. 5 is an enlarged view showing another example of the coating portion R. FIG.

FIG. 6 is an enlarged view showing yet another example of the coating portion R. FIG.

FIG. 7 is an enlarged view showing yet another example of the coating portion R. FIG.

FIG. 8 is a diagram showing how to put on the diaper 1 having the decorative pattern 50 .

Detailed ways

The description in this manual and the drawings will clarify at least the following matters.

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

According to the above-mentioned absorbent article, the presence of the marking portion makes it easier for the user to directly rub the microcapsule-coated portion, and the physical stimulation caused by the friction can newly destroy the microcapsules, so that the repellent fragrance can be effectively discharged. In this way, by the user destroying the microcapsules when putting on the absorbent article or at a desired time during use, the amount of fragrance can be adjusted by the user himself and the repellent effect can be exerted.

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

According to the absorbent article described above, the color of the microcapsule-coated portion is different from the surrounding color, which makes the coated portion conspicuous. As a result, the coated portion becomes easier to recognize by the user, and the coated portion itself can function as a marking portion.

In an absorbent article, it is desirable that the coating color has a thick part and a light part, and the light part is lighter in color than the thick part.

According to the absorbent article described above, the coating color has a light/dark tone difference, so the coating portion becomes more visible and functions as a marking portion.

In an absorbent article, it is preferable that the coated portion has a plurality of embossed portions, and that each of the plurality of embossed portions is the light portion.

According to the absorbent article described above, each of the plurality of embossed portions is a concave portion, and the embossed portion is a light portion having a light coating color. This further emphasizes the depth (shading) of the embossed recesses and makes the light/heavy tonal difference in the coated areas apparent. This makes the coated part more visible.

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

According to the absorbent article described above, the thick portion of the coated portion is formed from the portion where the microcapsules are coated in a large amount, and the light portion is formed from the portion where the microcapsule is coated in a small amount. Creating a light/heavy tone difference by adjusting the coating amount in this way makes it possible to use the light/heavy tone difference to form a pattern or the like in the coated portion. This makes the coated part visible. In addition, since light portions are formed by reducing the coating amount, the coating amount of microcapsules can be reduced.

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

According to the above absorbent article, since the fastening tape is a part that must be touched and pinched by the user's fingers when putting on the absorbent article, providing the coated portion coated with microcapsules at such a position can make the microcapsules Easier to be effectively rubbed and destroyed. This makes it easier to achieve the repellent effect during use.

In absorbent articles, it may be desirable for the pair of fastening strips to be of a different color than the side flaps.

According to the absorbent article described above, the fastening straps become more visible because the pair of fastening straps are of a different color than the side wings. This makes it easier for the user to immediately identify the position of the fastening strap.

In an absorbent article, it is desirable that the color of the pair of fastening tapes be different from the color of the coated portion.

According to the above absorbent article, as for the coated portion of the fastening tape where the microcapsules are coated, the color is different from the color of the fastening tape, which makes it easier for the user to identify the position of the coated portion. This makes it easier for the wearer to reliably touch the coated portion, and allows the microcapsules to be effectively destroyed. In addition, depending on the color tone of the coated part, the coated part can be used as a marking part that is visible even in a dark place, etc., which makes it possible to impart physical stimulation to the coated part and exert an insect repellent effect even in a dark place.

In an absorbent article, 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 are different from each other.

According to the absorbent article described above, since the colors of the side panels, the fastening tape bonded to the side panels, and the coated portion provided in the fastening tape are different from each other, these members can be made conspicuous. In particular, the fastening straps are clearly visible since the flanks and fastening straps are of different colors from each other. In addition, since the color of the coated part is different, this can make the location of the coated part more conspicuous. In addition, depending on the color tone of the coated part, the coated part serves as a marking part, so that the insect repellent effect can be exerted even in a dark place.

In an absorbent article, it is desirable that the mark portion be a mark that prompts the user to touch the coated portion.

According to the above absorbent article, since the marking portion is a mark (for example, text or picture) that prompts the user to destroy the microcapsules in the coating portion to exert the effect, the user can easily understand the method of exerting the effect, and obtain the effect easily and reliably. Insect repellent effect.

In an absorbent article, it is desirable that the marking portion be a marking that reminds the user of an insect.

According to the absorbent article described above, since the marking portion is a graphic mark of an insect targeted by the insect repellent effect, the user can immediately recognize the insect repelling effect when visually recognizing the marking portion. Due to the presence of such a mark portion, the user is further prompted to contact the coating portion.

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

According to the absorbent article described above, the coated portion is a portion that is actually rubbed by the user. Therefore, when the coated portion and the marking portion overlap each other, there is a risk that the marking portion will disappear due to friction. Since the coating part and the marking part do not overlap each other, the marking part can be maintained even when the coating part is rubbed multiple times.

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

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

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

According to the absorbent article described above, providing the marking portion by inkjet printing, gravure printing, or flexographic printing enables formation of the marking portion in an existing process without preparing other materials or the like. This results in cost reduction and ease of manufacturing.

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

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

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

According to the absorbent article described above, when the coated portion coated with microcapsules containing the color-forming agent is physically stimulated, the color-forming agent is released and the color of the coated portion is changed. By changing the color of the coated part before and after physical stimulation such as friction, the wearer can realize that the microcapsules are destroyed and exert the insect repellent effect.

===Implementation===

As an example of the absorbent article according to the present invention, the embodiment will be described using a so-called tape-type unfolded 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-absorbent pads, sanitary napkins, panty liners, animal disposable diapers, and the like.

===Structure of disposable diaper 1 ===

The disposable diaper 1 is a so-called belt 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 and young children, but may also be a disposable diaper for adults.

Fig. 1 is a plan view of the 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 an unfolded and stretched state as viewed from the non-skin side. The unfolded state of the diaper 1 refers to a state in which the entire diaper 1 is flatly unfolded. The stretched state of the diaper 1 refers to a state in which the diaper 1 has been stretched so that the wrinkles in the diaper 1 are substantially no longer visible, and the diaper 1 has been stretched so that its constituent members (for example, the front sheet 3 described below) The size is consistent with or close to the size of the component itself. Figures 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 as shown in FIG. 1 and the like, the diaper 1 has a longitudinal direction, a width direction, and a thickness direction that are orthogonal to each other. It should be noted that the "longitudinal direction" in the unfolded and stretched states corresponds to the "up and down direction" in the natural state and the packaged state. The thickness direction refers to the 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 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 left-right symmetrical shape with respect to the center line C-C. The center line CL is the center in the longitudinal direction. The diaper 1 includes a front waist part 1A, a back waist part 1B, and a crotch part 1C. The front waist part 1A is a part located in the front part (abdominal side) of the wearer. In addition, the rear waist part 1B is a part located at the rear part (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.

Diaper 1 includes: an absorbent body 2 that absorbs excreted fluid such as urine; a liquid-permeable front sheet 3 that covers the absorbent body 2 from the skin side; and a liquid-impermeable leak-proof sheet 4 that covers and absorbs from the non-skin side. body 2; a back sheet 5 that covers the leak-proof sheet 4 from the non-skin side and forms the outer shape of the diaper 1; and a pair of side panels 6 that are arranged side by side in the width direction on the front sheet 3 as a pair.

The front sheet 3 may be made of a breathable nonwoven sheet or the like, the leakage-proof 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 spunbond nonwoven sheet.

The absorbent body 2 has a rectangular shape long in the longitudinal direction in plan view, and includes an absorbent core (not shown) and a core wrapping 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 an example, the liquid-absorbent material may be made of liquid-absorbent fibers (eg, pulp fibers) containing superabsorbent polymers (so-called SAPs) or the like. The core wrapping sheet is, for example, a liquid-permeable tissue paper or a non-woven fabric sheet. However, it is also acceptable for the absorbent body to be constructed without a core wrapping sheet.

In addition, the diaper 1 includes the side panels 6 and elastic members 61 (for example, elastic threads) on both sides in the width direction, and the elastic members 61 can expand and contract in the longitudinal direction. The side panels 6 and the elastic member 61 form a pair of three-dimensional pleats serving as leakage-proof walls. The elastic member 61 is fixed to the side panel 6 in a state of being extended in the longitudinal direction. Providing three-dimensional pleats reduces the risk of excrement leaking across the width of the diaper 1 .

In addition, on both sides of the diaper 1 in the width direction, a pair of leg elastic members that are stretchable in the longitudinal direction are provided at positions mainly corresponding to the wearer's crotch portion in a manner consistent with the wearer's legs. 7 (e.g. elastic cord). Specifically, as shown in FIG. 1 , in the unfolded and extended state, the leg elastic members 7 are provided on the width direction outer side of the elastic member 61 for three-dimensional gathers. The leg elastic members 7 are fixed to the non-skin side of the side panel 6 in a state of being extended in the longitudinal direction. Therefore, in the put-on state, the side portions in the width direction of the diaper 1 fit around the wearer's legs, thereby suppressing leakage of excrement.

The number, shape, material, etc. 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 elastic members 61 and leg elastic members 7 can be set arbitrarily. These elastic members may be made of linear polyurethane stretchable fibers, a stretchable film in which a thermoplastic elastomer resin is melted to form a film, or a stretchable nonwoven sheet made of stretchable fibers.

In the unfolded state (Figs. 1 and 2), the diaper 1 has a generally hourglass shape. The front waist part 1A, the back waist part 1B, and the crotch part 1C have a pair of side flaps 20 and 30 at the width direction end part of the diaper 1. The side panels 20 and 30 are formed from the side panels 6 and the back panel 5 . In addition, a fastening tape 40 is provided at the widthwise outer end portions of the pair of side flaps 30 of the rear waist portion 1B.

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

In order to put the diaper 1 in a put-on state, that is, a state in which the wearer wears the diaper 1, the user or the wearer himself or herself folds and unfolds the diaper 1 at approximately the center in the longitudinal direction (periphery of the center line CL) while arranging the diaper 1 according to the wearer. Diapers 1. Subsequently, the pair of side flaps 30 located on the rear waist 1B side are folded inward in the width direction. Then, the hook member 42 provided on the fastening belt 40 is fastened to the non-skin side of the front waist 1A. In the diaper 1, a nonwoven fabric sheet is used for the back sheet 5 so that the hook member 42 can be directly fastened to the back sheet 5. However, the configuration is not limited to this. 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 panel 5. Furthermore, instead of the hook member 42, an adhesive tape may be provided on the fastening strap 40, for example.

Diaper 1 has a coating part to which a plurality of microcapsules MC are applied. Multiple microcapsules MC are encapsulated with insect repellent spices. In addition, the diaper 1 has a mark portion indicating the application portion. The coating part and the marking part will be described in detail later.

Insect repellent fragrances are repellents (repellent fragrances) against pests such as mosquitoes, gnats, non-biting midges, flies, etc., and are fragrances made from synthetic compounds or natural plant extracts. For example, citronellal, N,N-diethyl-3-methylbenzamide (DEET), sesquiterpenes, ethylethylbutylacetamidopropionate, picaridin, pyrethroids can be used Ester, cinnamon, rosemary, lavender, peppermint, eucalyptus, etc. Pest repellent fragrances can be selected based on the target pest, target wearer, etc.

Microcapsules MC refer to capsules having a diameter of 1 to 1000 μm and having a space for enclosing a core material (in this embodiment, an insect repellent perfume). As the microcapsule MC, there is no particular restriction on its shape as long as it can encapsulate the core material and control the discharge of the core material. Examples of shapes include spherical and amorphous. Furthermore, 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 spheres and amorphous shapes.

In microcapsules MC, the film (also called a wall member, etc.) enclosing the core material changes in response to physical or chemical stimulation to expel the components enclosed therein. Examples of physical stimulation include applying heat, physical pressure, physical shock, vibration, light, etc. to the membrane of the microcapsule MC. Examples of chemical irritation include contact between a liquid (aqueous solution) such as body fluid and the membrane of the microcapsule MC.

By applying physical stimulation or chemical stimulation to the membrane of the microcapsule MC, the membrane may be deteriorated, denatured, softened, porous, dissolved, collapsed or decomposed.

As a result, the core material in the microcapsules MC can begin to drain, or the degree of drainage can be accelerated if the core material is gradually drained before stimulation.

As a material for microcapsule MC, inorganic materials or organic materials 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, gelatin/gum arabic, water-soluble polymers (e.g., polyvinyl alcohol, polyvinyl acetate), melamine resin, urea/formalin resin, polyurethane resin, polystyrene, ethyl cellulose, polyamide, polyacrylic acid, silicone resin, carboxymethyl resin Cellulose etc.

It is preferred that the material used for the microcapsule MC is selected based on the physical properties of the core material and the conditions and environment in which release of the core material is desired. In the diaper 1 of this embodiment, microcapsules made of polyurethane resin with a film thickness of 2 μm are used as microcapsules MC, and citronellal is used as an insect repellent fragrance. This kind of citronellal has a herbal aroma, and it is also a fragrance that easily gives the impression of insect repellent effect. In particular, as the bladder, it is preferable to use a bladder that is destroyed due to physical stimulation, such as polyurethane resin.

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

The solvent solubility of the microcapsule MC relative to 100 g of solvent as the dispersion medium of the microcapsule at 25° C. is preferably 1.0 g or less, more preferably 0.5 g or less, even more preferably 0.1 g or less. Assess solvent solubility by adding 1.0g (0.5g, 0.1g, etc.) of sample to 100g of solvent at 25°C, letting the mixture sit for 24 hours, stirring gently as needed, and then visually assessing whether the sample is dissolved.

Preferably, the solvent retains the repellent fragrance encapsulated in the microcapsules and also retains the functional ingredients, ie the solvent dissolves the functional ingredients but does not dissolve or swell the microcapsules.

The amount of repellent fragrance released can vary depending on the amount, vapor pressure, degree of damage of the microcapsules relative to physical stimulation, thickness of the microcapsule layer, particle size of the microcapsules, etc.

===Coating part====

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 part X in FIG. 2 .

The coating part is provided at any part of the diaper 1 . In the present embodiment, the application portion R is provided on the non-skin sides 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 applied in such a manner that they are 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 material 41 has hydrophilicity so that the microcapsules MC can be 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 the tape folding line (folding line portion) TL. As shown in FIG. 4 , the coating portions R of this embodiment are applied in a planar shape from the outer end in the width direction of the tape base material 41 to the tape folding line TL. The tape base material 41 has a plurality of embossed portions 40E formed in advance. The application pattern of the coating portion R is not limited to this, and may be a shape such as a flat shape, a linear shape, a spiral shape, a zigzag shape, a dot shape, and the like. In addition, the coating portion R may be applied to the inner side in the width direction with respect to the tape folding line TL, or may be applied to substantially the entire tape base material 41 .

Typically, the pair of fastening straps 40 are parts that must be touched and pinched by the user's fingers when putting on the diaper 1 . Providing the coating portion R coated with microcapsules MC at such a position can make it easier for the microcapsules to be effectively rubbed and destroyed. This makes it easier for the user to exert the repellent effect while putting on the diaper.

＝＝＝Marking part＝＝＝

When putting on the diaper 1, although the microcapsules can be broken by the user pinching the coated portion R as described above to release the repellent fragrance, further application of physical stimulation such as rubbing the coated portion R by the user can further discharge the repellent. Spices make it possible to further obtain an insect repellent effect. For this purpose, it is preferable that the diaper 1 has a mark portion indicating the coated portion R so that the position of the coated portion R can be made clearer to the user. The existence of the marked part makes it easier for the user to directly rub the microcapsule coating part, and such physical stimulation can newly destroy the microcapsules and effectively discharge the insect repellent fragrance. By destroying the microcapsules when the absorbent article is put on or at a desired time during use, the amount of fragrance can be adjusted by the user themselves to further develop the repellent effect.

The coating portion R coated with a 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-mentioned "different colors" refer to colors that have a visually distinguishable relationship. Specifically, it is sufficient for the colors to have color numbers that are 3 or more apart from each other in the Ostwald color wheel. In this embodiment, the color of the pair of fastening tapes 40 and the color of the coating part R are different. Specifically, while the fastening tape 40 is green because the tape base material 41 formed of a green nonwoven fabric is used, the coating color of the coating portion R is white. Due to the color contrast, the user can easily identify the position of the coating portion R. In addition, since the coating portion R is obvious, the coating portion R itself can function as the marking portion M. This makes it easier for the wearer to reliably touch the coated portion R and effectively destroy the microcapsules. In addition, when the coated part has a color tone such as the above-mentioned white, this makes it easier to visually recognize the coated part R even in a dark place, making it easier to give physical stimulation to the coated part even in a dark place and exert insect repellent effects. Effect. It should be noted that the color of the tape base material 41 and the color of the coating portion R are not limited to these.

In addition, it is preferred that the color of the pair of fastening straps 40 is different from the color of the side flaps 30 . The fastening strap 40 becomes apparent in the case where the fastening strap 40 is of a different color than the flank 30 (eg, white). This makes it easier for the user to immediately identify the position of the fastening strap 40, allowing the user to easily touch the fastening strap 40. This allows efficient destruction of microcapsules.

Furthermore, 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. Since the side flaps 30, the fastening strips 40 coupled to the side flaps 30, and the coated portions R provided in the fastening strips 40 have different colors, it is possible to make these components conspicuous. In particular, the color of the side flap 30 is different from the color of the fastening strip 40 extending from the widthwise outer end of the side flap 30, which makes the fastening strip 40 conspicuous. In addition, since the color of the coated portion R is different, this can make the position of the coated portion R more conspicuous. Furthermore, as mentioned above, since the coated portion R has a color such as white as described above, this makes it easier to visually recognize the coated portion R as the mark portion 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. FIG. The color of the applied portion R shown in FIG. 5 has a dense portion R1 and a light portion R2 that is lighter in color than the dense portion R1. Here, the color difference between the dark portion R1 and the light portion R2 is a visually perceptible difference. "Color difference" can be compared by using a commercially available colorimeter to compare the two points (two areas) to be measured and comparing it based on the CIE 1976 (L*a*b*) color space defined in JIS Z 8729, etc. value to obtain. In addition, in the L*a*b* color system, it is preferable that the color difference (ΔE*ab) of two colors is 1.0 or more, which allows humans to visually recognize the light/dark color tone difference. Since the color of the applied portion R has a light/dark tone difference, the applied portion R easily becomes more visible and easily functions as the marking portion M. It should be noted that in FIG. 5 , both the thick portion R1 and the light portion R2 extending in the longitudinal direction are alternately arranged in the width direction. However, the number, arrangement, shape, etc. of the dark portions R1 and the light portions R2 are not limited to this and can be selected arbitrarily.

In addition, in the application part color of the application part R, when the dark part R1 is defined as the first part (R1) of the application part R, and the light part R2 is defined as the second part (R2), the second part The coating amount of the plurality of microcapsules per unit area in the portion is smaller than the coating amount of the plurality of microcapsules per unit area in the first portion. That is, the first part (heavy part R1) of the coated part R is formed by a part where the application amount of microcapsules is large, and the second part (light part R2) is formed by a part where the application amount of microcapsules is small. By adjusting the coating amount in this manner to create a light/heavy tone difference, it is possible to form a pattern (for example, a stripe pattern as shown in FIG. 5 ) or the like in the coating portion R using the light/heavy tone difference. Since the pattern formed using such a light/dark tone difference makes the coated portion R conspicuous, the coated portion R itself functions as a mark portion M that is easily visually recognized. In addition, since the light portion R2 is formed by reducing the coating amount, the coating amount can be reduced, and the cost can be reduced. In addition, the coating amount of microcapsules in the second part (light part R2) may be zero.

Returning to FIG. 4 , the coating part R has a plurality of embossed parts 40E in FIG. 4 . The plurality of embossed portions 40E may have any shape, such as a rhombus, a perfect circle, an ellipse, a linear shape, or the like, in addition to the substantially rectangular shape described above. Each of the plurality of embossed portions 40E is a concave portion, and also has a light portion R2 of a light coating color. That is, in the coated portion R, the portion other than the embossed portion 40E is the dense portion R1. The embossed portion 40E is a light and light portion R2, which further emphasizes the depth (shading) of the embossed concave portion and makes the light/dark tone difference of the coated portion R obvious. The plurality of embossed portions 40E look like a light-colored zigzag pattern, which makes the coated portion R obvious. Therefore, the coating part R itself can function as the marking part M.

FIG. 6 is an enlarged view showing yet another example of the coating portion R. FIG. As shown in FIG. 6 , the mark portion M may be a mark that prompts the user to touch the coating portion R. Here, text indicating a specific action such as "rubbing" directly prompts the user for the action, but for example, a picture indicating touching with a finger may be used. The mark part M is a mark (such as text or picture) that prompts the user to exert the insect repellent effect by destroying the microcapsules of the coating part R by giving physical stimulation, so the user can easily understand the method of exerting the effect, and it is easy and reliable Get the insect repellent effect.

In addition, as shown in FIG. 6 , here, the application portion R and the marking portion M do not overlap with each other. The coated portion R is a portion that is actually rubbed by the user. Therefore, when the coated portion R and the marking portion M overlap each other, there is a risk that the marking portion M will disappear due to being rubbed. Since the application part R and the marking part M do not overlap each other, the marking part M can be maintained even if the application part R is rubbed multiple times.

FIG. 7 is an enlarged view showing yet another example of the coating portion R. FIG. As shown in FIG. 7 , the mark portion M may be a mark that reminds the user of an insect. Insects refer to pests, and a mark that reminds the user of a mosquito is preferred as an example. Since the mark portion M is a graphic mark of the insect targeted by the insect repellent effect, the user can immediately recognize the insect repellent effect when visually recognizing the mark portion M. The presence of such a mark portion M further prompts the user to contact the application portion R.

Furthermore, as shown in FIG. 7 , there may be a non-overlapping portion TN in which the coating portion and the marking portion do not overlap each other, and an overlapping portion TT in which the coating portion and the marking portion overlap each other. Here, since the marking part M exists in the coating part R, the marking part M corresponds to the overlapping part TT. In the case where the coating part R and the marking part M have no overlapping part TT at all, when the user mistakenly rubs the marking part M as the coating part R, the microcapsules may be less likely to be destroyed. However, by overlapping the coating part R and the marking part M, the user can rub the coating part R more reliably and exert the insect repellent effect. In addition, in the case where at least part of the marking portion M is provided outside the application portion R (that is, in the case where the non-overlapping portion TN exists outside the application portion R), even if the user rubs the application multiple times When the mark portion R is removed, the entire mark portion M can be prevented from being rubbed and disappearing.

===Other embodiments ===

Although the above embodiments of the present invention are only 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 disclosure, and equivalents thereof are encompassed by the present disclosure.

In the above-mentioned embodiment, the application part R itself can function as the marking part M by using the color of the application part R, the light/dark tone difference of the application part color, and the like. However, the present invention is not limited to this. For example, the mark portion M may be provided at a position that is visually identifiable from the fastening tape 40 and back sheet 5 sides by inkjet printing, gravure printing, or flexographic printing. By providing the marking portion M through such a printing method, the marking portion M can be formed in an existing process without preparing other materials or the like. This results in cost reduction and ease of manufacturing.

In addition, the diaper 1 may have a predetermined decorative pattern on the non-skin side of the diaper 1 . As an example, FIG. 8 is a diagram showing how to put on the diaper 1 with the decorative pattern 50 . As shown in FIG. 8 , the diaper 1 may have a sheet member 4A provided with a decorative pattern 50 that is visually identifiable from the non-skin side of the diaper 1 , and a 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-described embodiment. Here, a mark prompting the user to rub the coating portion R provided on the fastening tape 40 is provided on the sheet member 4A together with the decorative pattern 50 as the mark portion M; the mark includes an arrow or a character ("friction tape") and Insect (e.g. mosquito) graphics. Therefore, providing the decorative pattern 50 and the marking portion M on the same sheet (sheet member 4A) makes it easier to form the marking portion M simultaneously with the decorative pattern 50 during the manufacturing process. It should be noted that, as in this example, as the mark portion M provided on the sheet member 4A, any text or picture can be selected as long as the text or picture reminds the user that the coating portion R exists, or as long as the text or picture It suffices to prompt the user to touch the coating part R and the like.

In the above embodiment, multiple microcapsules MC encapsulate the insect repellent spice. In addition, in addition to fragrance, multiple microcapsules MC can encapsulate color-developing agents. The color-developing agent is a substance (reagent) that reacts with a color-developing agent to develop color. In addition to individual compounds, mixtures can also be used. In addition, the chromogen to be encapsulated in the microcapsules may be single-color or multi-color.

As the color-forming agent in the present invention, for example, a known electron-donating color-forming agent generally used for pressure-sensitive paper and the like can be used. Examples thereof include: blue chromophores such as crystal violet lactone and 3,6-bis-diphenylaminofluorane; black chromogens such as 2-anilino-3-methyl-6-N-methyl methyl-pentylaminofluorane and 2-anilino-3-chloro-6-dimethylfluorane; red chromogens such as 2-chloro-3-methyl-6-diethylaminofluorane and 1 , 2-benzo-6-diethylaminofluorane; green chromogens such as 2-dibenzylamino-6-diethylaminofluorane and 2-octylamino-6-diethylaminofluorane. However, the color-developing agent is not limited to this.

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-based compounds, salicylic acid-based metal chlorides, salicylic acid-based metal oxides, and solid acid-based compounds. However, the color developer is not limited to this.

In the case where the microcapsule further contains a color-forming agent, when the coating part R is physically stimulated, the color-forming 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 physical stimulation such as friction, the wearer can realize that the microcapsules are destroyed and the insect repellent effect is exerted.

In the above-described embodiment, the coating portion R is provided on the non-skin side of the fastening tape, but the structure is not limited to this. The coating part can be provided in any part of the entire diaper 1 depending on the wearing state and the like. It should be noted that when an insect repellent perfume is used as in the diaper 1, in order to prevent foreign insects, it is preferable to provide a coating portion on the non-skin side of the diaper 1.

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

In the above embodiment, the insect repellent fragrance having an herbal aromatic fragrance is microencapsulated. However, microcapsules can encapsulate not only repellent fragrances, but also substances with well-known functional ingredients, such as warming agents with warming ingredients, cold-sensing agents with cold-sensing ingredients, and deodorizers with deodorizing ingredients. Agents, antibacterial agents with antibacterial functions and skin care agents with skin care ingredients.

List of reference signs

1: Diaper (absorbent article), 1A: Front waist, 1B: Back waist, 1C: Crotch 2: Absorbent body, 3: Front sheet, 4: Leak-proof sheet, 4A: Sheet member, 5: Back sheet, 6 : Side panels, 7: Leg elastic members, 20: Side wings, 30: Side wings, 40: Fastening tape, 41: With base material, 40E: Embossed part, 42: Hook member, 43: Fixed part, 45: None Textile fiber, 50: Decorative graphics, 61: Elastic member, M: Marking part, MC: Microcapsule, R: Coating part, R1: Heavy part (first part), R2: Light part (second part), S: Side end, TN: Non-overlapping part, TT: Overlapping part

Claims (13)

1. An absorbent article comprising:

a coating section coated with a plurality of microcapsules,

the plurality of microcapsules each encapsulate an insect repellent fragrance,

the absorbent article has a marking portion indicating the coating portion,

wherein the coating portion and the marking portion do not overlap each other,

the absorbent article further comprises:

a front waist portion;

a rear waist portion; 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 portion of the rear waist portion in the width direction of the absorbent article,

a pair of fastening strips are arranged in the side wings, and

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

the absorbent article further comprises a sheet member,

the sheet member has a decorative pattern different from the marking portion that can be recognized from a non-skin side view of the absorbent article, and,

the marking portion is provided on the sheet member.

2. The absorbent article of claim 1, wherein,

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 of claim 3, wherein,

the coating part has a plurality of embossed parts, and,

the plurality of embossed portions are each the light portion.

5. The absorbent article of claim 3, wherein

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

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

the first portion is the thick portion, and,

the second portion is the light portion.

6. The absorbent article of claim 1, wherein,

the color of the pair of fastening strips is different from the color of the side flaps.

7. The absorbent article as set forth in claim 1 or 6, wherein,

the color of the pair of fastening strips is different from the color of the coating portion.

8. The absorbent article of claim 6, wherein,

the colors of the pair of fastening tapes, the color of the side wings, and the color of the coating portion are different from each other.

9. The absorbent article of claim 1, wherein,

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

10. The absorbent article of claim 1, wherein,

the marking part is a mark for reminiscing the user of insects.

11. The absorbent article of claim 1, wherein,

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 each other,

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

12. The absorbent article as set forth in any one of claims 1 to 3, 11, wherein,

the marking portion is provided by any one of inkjet printing, gravure printing, and flexographic printing.

13. The absorbent article of claim 1, wherein,

the plurality of microcapsules each encapsulate a chromonic agent.