CN114222552B

CN114222552B - Absorbent article

Info

Publication number: CN114222552B
Application number: CN201980099365.5A
Authority: CN
Inventors: 渡部芳久; 中岛广嗣
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2023-04-25
Anticipated expiration: 2039-08-30
Also published as: CN114222552A; JP6649535B1; JPWO2021038874A1; BR112021026913A2; WO2021038874A1

Abstract

The absorbent article (1) has a coating portion (R) coated with a plurality of microcapsules each encapsulating an aromatic substance, and the absorbent article (1) is characterized in that the plurality of microcapsules have, in a state in which the absorbent article (1) is taken out from a packaging material: a broken capsule as a broken microcapsule; unbroken capsules as unbroken microcapsules.

Description

Absorbent article

Technical Field

The present invention relates to an absorbent article.

Background

Disposable diapers having an absorber that absorbs excrement are used not only for infant care and adult care but also for pet care. Further, as described in patent document 1, there is known a fiber structure including microcapsules containing an insect-repellent component, which has an ability to repel sanitary insect pests such as mosquitoes.

Prior art literature

Patent literature

Patent document 1: japanese patent application laid-open No. 2017-179651

Disclosure of Invention

Problems to be solved by the invention

However, as disclosed in patent document 1, when the microcapsule containing the insect-repellent ingredient is directly applied to an absorbent article such as a disposable diaper, when the packaged absorbent article contained in the packaging material is taken out, since the insect-repellent ingredient is still stored in the microcapsule, there is a problem that it is unlikely that the wearer or the user who tries to put the absorbent article on the wearer recognizes that the absorbent article is an absorbent article having an insect-repellent effect.

The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an absorbent article which makes it easy for a wearer or the like to recognize the effect of a substance applied to the absorbent article when the absorbent article is taken out from a packaging material and when the absorbent article is put on.

Solution for solving the problem

The main aspect of the present invention for achieving the above object is an absorbent article comprising: a coating portion coated with a plurality of microcapsules each encapsulating a substance having a fragrance, the plurality of microcapsules including broken capsules, which are broken microcapsules, and unbroken capsules, which are unbroken microcapsules, when the absorbent article has been taken out from a packaging material.

Other features of the present invention than those described above will become apparent upon reading the description of the present specification with reference to the accompanying drawings.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, the effect of the substance applied to the absorbent article can be easily recognized by the wearer or the like when the absorbent article is taken out from the packaging material and when the absorbent article is put on.

Drawings

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

Fig. 2 is a plan view of the diaper 1 in an unfolded and extended state when viewed from the non-skin side.

Fig. 3A is a schematic view showing how the diaper 1 shown in fig. 1 is folded at the belt fold line TL.

Fig. 3B is a schematic view showing how the diaper 1 shown in fig. 3A is folded at the left and right fold lines SL.

Fig. 4 is a schematic view showing the diaper 1 in a packaged state.

Fig. 5 is a perspective view of a disposable diaper package 50.

Fig. 6 is an electron micrograph of a region including both broken capsules DC and unbroken capsules NC in the coating section.

Fig. 7 is an electron micrograph of a region including both broken capsules DC and unbroken capsules NC in the coating section.

Fig. 8 is an electron micrograph of a region including both broken capsules DC and unbroken capsules NC in the coating section.

Fig. 9 is an enlarged view of the X portion in fig. 2.

Fig. 10 is a diagram illustrating an example of a processing trace portion.

Detailed Description

At least the following matters will be apparent from the description of the present specification and drawings.

An absorbent article comprising: a coating portion coated with a plurality of microcapsules each encapsulating a substance having a fragrance, the plurality of microcapsules including broken capsules, which are broken microcapsules, and unbroken capsules, which are unbroken microcapsules, when the absorbent article has been taken out from a packaging material.

According to the absorbent article described above, the user or wearer can recognize the effect of the substance flowing out of the broken bag when the absorbent article is taken out of the packaging material, and the user or wearer is likely to recognize the effect of the substance during use due to the damage to the unbroken bag before and during use.

In the absorbent article, it is desirable that the substance is an insect repellent fragrance.

According to the above-described absorbent article, the user or wearer can recognize the effect of the insect repellent fragrance when the absorbent article is taken out of the packaging material, and is likely to recognize the effect of the insect repellent fragrance before and during use. Further, due to the effect of the insect repellent fragrance flowing out from the broken bag in the packaged state, the risk of insects being mixed into the inside of the packaging material during storage in a shop or home or the like can be reduced.

In the absorbent article, it is desirable that the coating portion has a processing trace portion in which the number of broken cells per unit area is larger than the number of unbroken cells per unit area.

According to the absorbent article described above, the processing trace portion makes it possible to more reliably provide the broken pocket and the unbroken pocket in the absorbent article. Thus, the effect of the substance is likely to be identified both before and during use.

In the absorbent article, it is desirable that the coating portion include a non-processed trace portion, the non-processed trace portion being a portion in which the number of unbroken cells per unit area is greater than the number of broken cells per unit area when the absorbent article has been taken out of the packaging material, and an area of the non-processed trace portion is greater than an area of the processed trace portion.

According to the absorbent article, for example, the effect of the substance can be further exhibited during use by the wearer or the like breaking the unbroken bag according to the desired degree of the effect of the substance.

In this absorbent article, it is desirable that at least a part of the absorbent article has been folded at a fold line portion when the absorbent article has been taken out of the packaging material, the processing trace portion is the fold line portion, and at least a part of the broken bag is provided in the fold line portion.

According to the absorbent article described above, the pressure from folding is likely to form a broken bag, and thus the processing trace portion can be easily formed during manufacturing. Therefore, the effect of the substance is likely to be more reliably exhibited in a state of being accommodated in the packaging material.

In the absorbent article, it is desirable that at least a part of the breakage bag is provided at an outer end portion of the absorbent article when the absorbent article is in the unfolded state.

According to the absorbent article described above, the broken pocket is more likely to be formed by the impact in the cutting step for forming the outer end portion of the absorbent article provided with the coating portion. Therefore, the effect of the substance is likely to be more reliably exhibited in a state of being accommodated in the packaging material.

In the absorbent article, it is desirable that the absorbent article further includes a fastening tape portion, and the coating portion is provided in the fastening tape portion.

According to the absorbent article described above, since the fastening band portion is a portion that is highly likely to be particularly caught by the hand when the absorbent article is worn, it is likely that the broken bag will be more reliably formed when the absorbent article is worn. Therefore, in the wearing state, the effect of the substance is likely to be exerted.

In the absorbent article, it is desirable that at least a part of the broken bag is provided in the front end portion of the fastening tape portion.

According to the absorbent article described above, the broken bladder is likely to be formed by an impact in the cutting step performed during the formation of the fastening tape portion. Therefore, the effect of the substance is likely to be more reliably exhibited in a state of being accommodated in the packaging material.

In this absorbent article, it is desirable that, when the absorbent article has been taken out from the packaging material, the fastening tape portion has been folded at a tape folding line extending in the up-down direction in such a manner that a skin side surface of the fastening tape portion is inside, the fastening tape portion has a temporary fastening compressed portion for maintaining a folded state, and at least a part of the broken bag is provided in the temporary fastening compressed portion.

According to the absorbent article described above, the broken bladder is likely to be formed by the pressure for forming the temporary fastening compressed portion. Therefore, the effect of the substance is likely to be more reliably exhibited in a state of being accommodated in the packaging material.

= = embodiment= = = =

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

Structure of disposable diaper 1= = = = =

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 a diaper 1 in an unfolded and extended state, as seen from the skin side. Fig. 2 is a plan view of the diaper 1 in an unfolded and extended state, seen 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 such that wrinkles in the diaper 1 are substantially no longer visible, and a state in which the diaper 1 has been extended such that the size of its constituent members (for example, a front sheet 3 described later) coincides with or approximates the size of the members themselves. Fig. 1 and 2 show a state in which the diaper 1 is taken out of a packaging material (not shown), unfolded and elongated.

In the developed and elongated state as shown in fig. 1 and the like, the diaper 1 has a longitudinal direction, a left-right direction, and a thickness direction orthogonal to each other. It should be noted 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 constituent members of the diaper 1 overlap each other. The side that contacts 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 shape that is bilaterally symmetrical about the center line C-C. The center line CL is the center in the longitudinal direction. The ventral portion 1A is located on the ventral side with respect to the center line CL, and the dorsal portion 1B is located on the dorsal side with respect to the center line CL. In the diaper 1, the abdomen-side portion 1A covers the abdomen side of the wearer and the back-side portion 1B covers the back side of the wearer.

The diaper 1 comprises: an absorber 2 that absorbs excreted fluid such as urine; a liquid-permeable front sheet 3 covering the absorber 2 from the skin side; a liquid-impermeable and leakage-proof sheet 4 covering the absorber 2 from the non-skin side; a back sheet 5 which covers the leakage preventing 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 spunbond nonwoven sheet. The front sheet 3 and the back sheet 5 may be respectively selected from SMS nonwoven fabric sheets (spunbond/meltblown/spunbond nonwoven fabric sheets), spunbond nonwoven fabric sheets, breathable nonwoven fabric sheets, plastic sheets, porous plastic sheets, laminate sheets of these nonwoven fabric sheets, and the like.

The absorber 2 has a rectangular shape long in the longitudinal direction in 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. As one example, the liquid absorbent material may be made of liquid absorbent fibers (e.g., pulp fibers) containing a superabsorbent polymer (so-called SAP) or the like. The core wrap sheet is, for example, a liquid permeable tissue paper or nonwoven sheet. But configurations in which the absorbent body does not have a core wrap sheet are also acceptable. It should be noted that the absorbent core may have a rectangular shape such as a rectangle and a shape having a portion that narrows inwardly in the left-right direction such as a substantially hourglass shape.

Further, the diaper 1 includes side panels 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 elongated in the longitudinal direction. Providing the three-dimensional gathers reduces the risk of leakage of excrement from the left-right direction of the diaper 1.

Further, in both side portions in the left-right direction of the diaper 1, a pair of leg elastic members 7 (e.g., elastic threads) that are stretchable in the longitudinal direction are provided at positions mainly corresponding to the crotch of the wearer so as to coincide with the legs of the wearer. Specifically, as shown in fig. 1, in the unfolded and extended state, the leg elastic members 7 are provided outside in the left-right direction of the elastic member 61 for three-dimensional gather. The leg elastic members 7 are fixed to the non-skin side face of the side sheet 6 in a state elongated in the longitudinal direction. Therefore, in the worn state, the side portions in the lateral direction of the diaper 1 are fitted around the legs of the wearer, 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 linear polyurethane stretchable fibers, stretchable films in which thermoplastic elastomer resins are melted to form films, or stretchable nonwoven sheets made of stretchable fibers.

In the unfolded state (fig. 1 and 2), the diaper 1 has a substantially hourglass-like shape, and the stomach portion 1A and the back portion 1B have a pair of side flaps 20, 30 respectively, which extend outwardly beyond the longitudinal center portion (crotch portion when the diaper is put on) on both sides in the left-right direction. The side flaps 20 and 30 are formed from the side panels 6 and the back panel 5. Further, the fastening band portion 40 is fixed to the laterally outer end portions of the pair of side flaps 30 of the back side portion 1B.

The fastening tape portions 40 each include a tape base 41, a hook member 42, and a fixing portion 43. The belt base 41 is, for example, a green nonwoven fabric member, and is formed in a substantially rectangular shape long in the left-right direction. As shown in fig. 2, in the tape base material 41, a plurality of compressed portions 40E each having a substantially rectangular shape are provided so as to be staggered over substantially the entire tape base material 41. In fig. 1, the compressing portion 40E is omitted for convenience. By providing the compression portion 40E in the tape base material 41, the fibers of the nonwoven fabric of the tape base material 41 are compacted, maintaining the tape shape and increasing the rigidity of the tape base material 41. This makes it easier for a user, such as a parent, who tries to put the diaper 1 on the wearer (hereinafter also simply referred to as "user"), to pull the fastening tape portion 40. Therefore, the operation of wearing the diaper 1 can be performed more easily. The hook members 42 (for example, male members of a hook and loop fastener) are provided on the skin side surface of the tape base material 41 extending outward in the left-right direction from the side flaps 30.

In order to put the diaper 1 on, that is, in a state in which the diaper 1 is put on by a wearer, the user or the wearer himself/herself folds the developed diaper 1 at the substantially center (the periphery of the center line CL) in the longitudinal direction while arranging the diaper 1 according to the wearer. Subsequently, the pair of side flaps 30 located on the back side portion 1B side are folded inward in the left-right direction. Then, the hook member 42 provided on the fastening tape portion 40 is fastened to the non-skin side face of the abdomen-side 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 sheet 5. Further, instead of the hook member 42, for example, an adhesive tape may be provided on the fastening tape portion 40.

The diaper 1 has a coating portion coated with microcapsules MC encapsulating an insect repellent fragrance. The coating section will be described in detail later.

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

The microcapsule MC refers to a capsule having a diameter of 1 to 1000 μm and having a space enclosing a core material (insect repellent fragrance in this embodiment). The microcapsule MC is not particularly limited in its shape as long as it can encapsulate the core material and control the discharge of the core material. Examples of the outline 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 film (also referred to as a wall member or the like) that encapsulates the core material is changed by physical stimulus or chemical stimulus to discharge the components encapsulated therein. Examples of physical stimulus include application of heat, physical pressure, physical impact, vibration, light, etc. to the coating of the microcapsule MC. Examples of chemical stimulus include contact between a liquid (aqueous solution) such as body fluid and a coating film of the microcapsule MC.

By applying physical or chemical stimulus to the coating film of the microcapsule MC, deterioration, denaturation, softening, porosification, dissolution, collapse or decomposition of the coating film 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 microcapsules MC, an inorganic material or an organic material may 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, ethylcellulose, polyamides, polyacrylic acid, silicone resins, carboxymethyl cellulose, and the like.

It is preferred that the material for the microcapsules MC be selected according to the physical properties of the core material and the conditions and environment under which release of the core material is desired. In the diaper 1 of the present embodiment, microcapsules made of polyurethane resin having a film thickness of 2 μm are used as the microcapsules MC, and citronellal is used as the insect repellent fragrance. Such citronellal has the fragrance of herb systems, and is also a fragrance that tends to create the impression of an insect repellent effect. In particular, as the bladder, it is preferable to use a bladder that is broken by physical stimulus, such as polyurethane resin.

The microcapsules are applied to the coating section together with a predetermined solvent. It is preferable that the microcapsule MC is insoluble in a solvent, and it is preferable that the microcapsule MC does not expand in a solvent as a dispersion medium of the microcapsule MC. This configuration is adopted in view 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 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 microcapsules MC at 25 ℃ with respect to 100g of solvent as a dispersion medium of the microcapsules is preferably 1.0g or less, more preferably 0.5g or less, even more preferably 0.1g or less. Solvent solubility was assessed by adding 1.0g (0.5 g, 0.1g, etc.) of the sample to 100g of solvent at 25 ℃, allowing the mixture to stand for 24 hours, gently stirring as needed, and then visually assessing 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 release amount of the insect repellent fragrance may vary depending on the amount, vapor pressure, degree of breakage of the microcapsules against physical stimulus, thickness of layer of the microcapsules, particle diameter of the microcapsules, and the like.

Packaging state of the paper diaper 1= = = = = =

When the diaper 1 shown in fig. 1 and 2 in the unfolded and extended state is folded in the order shown in fig. 3A and 3B, the diaper 1 can be brought into the packaged state shown in fig. 4A. Fig. 3A is a schematic view showing how the diaper 1 shown in fig. 1 is folded at the belt fold line TL. Fig. 3B is a schematic view showing how the diaper 1 shown in fig. 3A is folded at the left and right fold lines SL. Fig. 4 is a schematic view showing the diaper 1 in a packaged state. Fig. 5 is a perspective view of a disposable diaper package 50.

First, in the diaper 1 in the unfolded and extended state, with the skin side face positioned on the inside, the fastening tape portion 40 (the face provided with the hook member 42) is folded at the tape folding line TL. On the folded fastening band portion 40, a plurality of temporary fastening compressed portions F are formed from the skin side toward the non-skin side (from the non-skin side of the fastening band portion 40), and the state shown in fig. 3A is changed. The belt fold line TL is a fold line extending in the longitudinal direction (up-down direction) and is provided outside the side flap 20 in the left-right direction. It should be noted that the temporary fastening compressed portion F is a compressed portion provided for maintaining the folded state of the fastening tape portion 40, and serves as temporary fastening so that the fastening tape portion 40 can be brought into the unfolded state shown in fig. 1 and 2 when the diaper 1 is put on. The temporary tightening compression parts F are compression parts having a circular shape and are provided in a staggered configuration.

Subsequently, the side end portion S in the left-right direction of the diaper 1 in the state shown in fig. 3A is folded inward in the left-right direction and inward in the thickness direction (toward the skin side) at the left-right folding line SL, so that the diaper 1 is in the state shown in fig. 3B. The left and right folding lines SL are a pair of folding lines extending in the up-down direction. In the present embodiment, the left and right folding lines SL are provided on the outer side of the absorber 2 and on the inner side of the front sheet 3 and the side flaps 30, respectively, in the left and right direction.

Then, in the case where the skin side surface of the diaper 1 is positioned inside, the diaper 1 in the state shown in fig. 3B is folded at the up-down folding line CL so that the diaper 1 is in the state shown in fig. 4. The up-down folding line CL is a folding line extending in the left-right direction, and is also a center line CL of the center in the longitudinal direction. The packaged state of the diaper 1 shown in fig. 4 is also a state of the diaper 1 accommodated in the packaging material 51 shown in fig. 5. That is, the diaper 1 shown in fig. 4 is also the diaper 1 taken out of the packaging material 51 accommodating the diaper 1. It should be noted that the package 50 is a product having a handle 52 and in which a plurality of diapers 1 are housed inside a packaging material 51, and the diapers 1 are in a packaged state in which the diapers 1 are sealed by the packaging material 51. It should be noted that fig. 5 shows a package 50 including a plurality of diapers 1, but the configuration is not limited thereto. For example, the package may be a package in which a single wrapper houses a single absorbent article.

= = coating portion= = =

The coating portion is provided at an arbitrary position on the diaper 1. In the present embodiment, the coating portion R (hatched portion in fig. 2 and 9) is provided on the non-skin side surfaces on both sides in the left-right direction of the fastening tape portion 40, and is located at a portion that does not overlap the back surface sheet 5 and the side sheet 6. The coating portion R is flatly applied to substantially the entire tape base material 41 in which the plurality of compressed portions 40E are formed in advance. The coating pattern of the coating portion R is not limited thereto, and may be a shape such as a planar shape, a straight shape, a spiral shape, a Z shape, or a dot shape. Further, it is preferable that the tape base material 41 has hydrophilicity so that the microcapsules MC are easily entangled with the nonwoven fabric fibers 45 of the tape base material 41 of the fastening tape portion 40.

The coating portion R of the diaper 1, which has been taken out from the packaging material 51 shown in fig. 4, includes broken capsules DC in which the microcapsules MC are broken and unbroken capsules NC in which the microcapsules MC are unbroken. In other words, the diaper 1 has the damaged pocket DC and the unbroken pocket NC in a state of being accommodated in the packaging material 51.

The damaged capsule DC is a microcapsule MC in which the coating film is at least partially damaged. The term "broken" refers to a state in which the film has at least scratches, indentations, deformations, or cracks. The damaged capsule DC is in a state where the contained insect-repellent fragrance leaks from the ruptured portion to the outside of the microcapsule MC or the insect-repellent fragrance is exposed.

Fig. 6 to 8 are electron micrographs of the region including both the damaged capsules DC and the undamaged capsules NC in the coating section, and are photographs at 500 times magnification. In the photographs shown in fig. 6 to 8, the rod-like object is the nonwoven fabric fiber 45 of the tape base material 41, and the microcapsules MC are provided around the nonwoven fabric fiber 45. The unbroken capsule NC is spherical and has an insect repellent fragrance. On the other hand, the broken bladder has various shapes and has been collapsed or is in an internally visible state.

Since the insect repellent fragrance of the present embodiment is a highly volatile fragrance, since the diaper 1 includes the broken bag DC, the insect repellent fragrance is easily filled with the airtight packaging material 51. When the packaging material 51 is opened, first, the wearer or user can recognize the fragrance of the insect repellent fragrance contained in the broken pouch DC. Thus, the wearer or user can recognize that the diaper 1 includes insect repellent fragrance before the diaper 1 is put on. In addition, due to the effect of the insect repellent fragrance flowing out from the broken bag in the packaged state, the risk of insects being mixed into the inside of the packaging material 51 during storage in a shop, home, or the like can be reduced.

In addition, since the diaper 1 includes the broken bag DC when taken out from the packaging material 51, the wearer or user can recognize the fragrance of the insect repellent fragrance flowing out from the broken bag DC when taking out the diaper 1 from the packaging material 51 or performing an operation such as unfolding the diaper 1, for example. Thus, the wearer or user can recognize that the diaper 1 includes insect repellent fragrance before wearing the diaper 1.

Further, since the diaper 1 includes not only the broken bag DC but also the unbroken bag NC, the unbroken bag NC becomes broken when receiving some impact or contact in the worn state. When the unbroken capsule NC is subjected to physical stimulus, the unbroken capsule NC becomes a broken capsule DC, and new insect repellent fragrance may leak to the outside or become exposed. Thus, the presence of the insect repellent fragrance can be identified not only before the diaper is put on, but also during the period when the diaper is in the on-state. In addition, the insect repellent fragrance is likely to exert an insect repellent effect not only before the diaper 1 is put on but also during the period of putting on the diaper 1.

Incidentally, the belt base material 41 includes a plurality of compressed portions 40E. However, the formation of the coating portion R is completed on the tape base material 41 on which the compressed portion 40E has been formed in advance, and therefore the microcapsules are not broken due to the formation of the compressed portion 40E on the tape base material 41.

Fig. 9 is an enlarged view of the X portion in fig. 2. In fig. 9, the compressed portion 40E provided on the belt base 41 is omitted. Typically, the fastening tape portion is that portion which is caught by the hand of the wearer or user when the diaper is put on. Accordingly, since the coating portion R is provided in the fastening tape portion 40, the fastening tape portion 140 is subjected to physical stimulus (e.g., friction) when pinched by the wearer or user, so that the unbroken capsules NC in the microcapsules MC of the coating portion R can be made more reliable to become broken capsules DC, thus making it more likely to exert the effect of the insect repellent fragrance when wearing the diaper.

The coating portion R has a processing trace portion where the number of broken capsules DC per unit area is greater than the number of unbroken capsules NC per unit area. The processing trace portion is a marked portion subjected to pressure and impact in compression processing, folding processing, cutting processing, laser processing, or the like after the coating portion R is formed. The processing trace is a portion where the unbroken bladder NC becomes a broken bladder DC due to pressure and impact during processing. Preferably, the processing to form the processing trace portion is performed during the manufacturing process. Since this processing is performed during the manufacturing process, the broken bag DC is included in the processing trace portion of the diaper 1 in the packaged state. Thus, the wearer or user can recognize that the diaper 1 includes insect repellent fragrance before the diaper 1 is applied. Note that in fig. 9 and 10 described below, the processing trace portions (M1 to M2, P1 to P5) are shown by dot hatching.

The number of broken cells DC per unit area and the number of unbroken cells NC per unit area of the diaper 1 can be compared by preparing a sample sheet per unit area by cutting a target area and visually comparing the number of broken cells NC in the sample sheet using an electron microscope.

In the diaper 1, a broken bag DC is provided at the front end portion M1 of the fastening tape portion 40. The distal end portion M1 of the fastening tape portion 40 is a portion adjacent to a cut portion generated when the shape of the tape base material 41 is formed. Therefore, the tip portion M1 is also the processing trace portion M1. In the processing trace portion M1, the broken capsule DC is easily formed due to the impact in the cutting step. In this way, since the front end portion M1 of the fastening tape portion 40 serves as the processing trace portion M1, a separate step for forming the broken bag DC does not need to be provided, thereby making it possible to more easily obtain the diaper 1 reliably including the broken bag in the packaged state. As a result, the packaged diaper 1 includes the broken bag DC, and the wearer or user can recognize that the diaper 1 includes the insect repellent fragrance before putting on the diaper 1.

In addition, as shown in fig. 3A, in the packaged state, the diaper 1 includes a temporary fastening depressed portion F for maintaining the folded state of the fastening tape portion 40, and the temporary fastening depressed portion F is a processing trace portion M2. The temporary tightening compressed portion F is formed after the application of the application portion R, and therefore the processing trace portion M2 is a portion where the broken bladder DC is likely to be formed due to the pressure during the formation of the temporary tightening compressed portion F. As a result, the packaged diaper 1 includes the broken bag DC, and the wearer or user can recognize that the diaper 1 includes the insect repellent fragrance before putting on the diaper 1.

It should be noted that the coating portion R has a non-processed trace portion N in which the number of unbroken pockets NC per unit area is greater than the number of broken pockets DC per unit area when the diaper 1 is taken out of the packaging material 51. In this case, in the coating portion R, the area of the non-processing trace portion N is preferably larger than the area of the processing trace portion. Specifically, the processing trace portion of the coating portion R of the diaper 1 includes processing trace portions M1, M2 (temporary fastening compressed portions F), and the non-processing trace portion N is an area of the fastening tape portion 40 other than the processing trace portions M1, M2 (temporary fastening compressed portions F). As can be seen from fig. 9, the area of the non-processed trace portion N of the coating portion R of the diaper 1 is larger than the area of the processed trace portion. In this way, since the area of the unbroken capsule NC is set to be large, the wearer or user can adjust the number of broken capsules according to the desired effect of the insect-repellent fragrance, thereby making it possible to obtain the effect of the insect-repellent fragrance corresponding to the worn state.

= = other embodiments= = = =

Although the above embodiments of the present invention are merely for the convenience of understanding the present invention, the present invention should not be construed as being limited in any way. The present invention may be modified or improved without departing from the gist thereof, and equivalents thereof are intended to be covered.

In the above embodiment, the coating portion R is provided on the non-skin side surface of the fastening tape portion, but the configuration is not limited thereto. The coating portion may be provided on any portion of the entire diaper 1 depending on the wearing state or the like. It should be noted that in the case of using an insect repellent fragrance like the diaper 1, in order to prevent insects from the outside, it is preferable to provide a coating portion on the non-skin side surface of the diaper 1.

In the above embodiment, the processing trace portions M1 and M2 in the fastening band portion 40 are described above, but the processing trace portions are not limited to this. Fig. 10 is a diagram illustrating an example of a processing trace portion. In the case where the coating portion is provided on a portion overlapping at least a part of the processing trace portions P1 to P5, the broken capsule DC is formed in the processing trace portions P1 to P5.

The processing trace portion P1 is an outer end portion of the diaper 1, and is, for example, a portion adjacent to a cut portion when the back sheet 5 and the side sheet 6 are cut into the shape shown in fig. 10. In the processing trace portion P1, a broken capsule is easily formed due to an impact in the cutting step.

The processing trace P2 and the processing trace P3 are a left-right folding line SL and an up-down folding line CL, respectively. In the diaper 1, folding the portion of the diaper 1 corresponding to the left and right fold lines SL and the up and down fold lines CL, respectively, makes it easier to compress the fibers of the components of the diaper 1 in the portion overlapping the left and right fold lines SL and/or the up and down fold lines CL, and therefore, the microcapsules are easily broken. Therefore, in the processing trace portions P2 and P3, which are portions overlapping the left-right folding line SL and/or the up-down folding line CL, the broken bag DC is easily formed due to the folding pressure.

The processing trace portions P4 are each adjacent to a portion cut when the fastening band portion 40 is cut into the shape shown in fig. 10 or the like. In the processing trace portion P4, the broken capsule DC is easily formed due to the impact in the cutting step.

The processing trace P5 is a tape fold line TL. In the diaper 1, the fastening tape portion 40 is folded at the tape folding line (folding line portion) TL in a state where the diaper is taken out from the packaging material 51. Folding the tape substrate 41 at the tape fold line TL makes it easier to compress the fibers of the tape substrate 41 in the portion overlapping the tape fold line TL, and thus to break the microcapsules. Therefore, at least in the processing trace portion P5, the broken capsule DC is easily formed due to the pressure caused by folding.

The processing traces P1 to P5 are made in steps of the manufacturing process of the diaper 1, and thus the broken bladder DC can be formed more reliably without increasing the number of manufacturing steps. As a result, in the packaged state, the diaper 1 is in a state having the broken bag DC, and the wearer or user can recognize that the diaper 1 includes the insect repellent fragrance before wearing the diaper 1.

In the above embodiment, the structure in which the broken bladder DC is provided at the processing trace portion has been described, but the structure is not limited to this. The diaper may include the broken bladder in a portion other than the processing trace portion, not necessarily in the processing trace portion.

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

In the above embodiment, the insect repellent fragrance having the fragrance of herb-based fragrance is microencapsulated, but the present invention is not limited thereto. The microcapsules may encapsulate substances having known functional components, each having a fragrance such as a warming agent having a warming component, a cold feeling agent having a cold feeling component, a fragrance having a fragrance component, a deodorant having a deodorizing component, an antibacterial agent having an antibacterial function, and a skin care agent having a skin care component.

List of reference numerals

1: diaper (developed disposable diaper, tape type disposable diaper, disposable diaper), 1A: ventral portion, 1B: backside portion, 2: absorber, 3: front sheet, 4: leak protection piece, 5: back sheet, 6: side sheet, 7: leg elastic member, 20: side wings, 30: side wings, 40: fastening band portion, 41: tape substrate, 40E: compression section, 42: hook member, 43: fixing portion, 50: packaging, 51: packaging material, 61: elastic member, F: temporary fastening compression section, MC: microcapsules, M1: machining trace (tip), M2: processing trace portion, P1: processing trace portion, P2: processing trace part, P3: processing trace part, P4: processing trace part, P5: processing trace portion, DC: broken capsule, NC: unbroken capsule, R: coating part, S: side ends.

Claims

1. An absorbent article comprising:

a coating section coated with a plurality of microcapsules,

the plurality of microcapsules each encapsulate a substance having a fragrance,

when the absorbent article has been removed from the packaging material, the plurality of microcapsules includes broken capsules and unbroken capsules,

the broken capsule is a broken microcapsule,

the unbroken capsules are unbroken microcapsules,

the coating part is provided with a processing trace part provided with the damaged bag,

in the processing trace portion, the number of broken capsules per unit area is greater than the number of unbroken capsules per unit area.

2. The absorbent article of claim 1, wherein,

the substance is an insect repellent fragrance.

3. The absorbent article according to claim 1 or 2, wherein,

the coating portion includes a non-processing trace portion,

the non-processed trace portion is a portion where the number of unbroken cells per unit area is greater than the number of broken cells per unit area when the absorbent article has been removed from the packaging material, and

the area of the non-processing trace portion is larger than the area of the processing trace portion.

4. The absorbent article according to claim 1 or 2, wherein,

when the absorbent article has been removed from the packaging material, at least a portion of the absorbent article has been folded at a fold line,

the processing trace portion is the folding line portion, and

at least a portion of the broken bladder is disposed in the fold line portion.

5. The absorbent article of claim 1, wherein,

when the absorbent article is in the unfolded state,

at least a portion of the broken bladder is disposed at an outer end portion of the absorbent article.

6. The absorbent article of claim 1, wherein,

the absorbent article further includes a fastening tape portion, and,

the coating portion is provided in the fastening tape portion.

7. The absorbent article of claim 6, wherein,

at least a part of the broken bag is provided in the front end portion of the fastening band portion.

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

when the absorbent article has been removed from the packaging material,

the fastening strip portion has been folded at the strip fold line in such a way that the skin side of the fastening strip portion is inside,

the belt fold line extends in the up-down direction,

the fastening band portion has a temporary fastening compression portion for maintaining a folded state, and

at least a portion of the broken bladder is disposed in the temporary tightening compression.