WO2023068036A1 - Article absorbant - Google Patents

Article absorbant Download PDF

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Publication number
WO2023068036A1
WO2023068036A1 PCT/JP2022/037143 JP2022037143W WO2023068036A1 WO 2023068036 A1 WO2023068036 A1 WO 2023068036A1 JP 2022037143 W JP2022037143 W JP 2022037143W WO 2023068036 A1 WO2023068036 A1 WO 2023068036A1
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WO
WIPO (PCT)
Prior art keywords
absorbent article
carrier layer
sheet
absorbent
microcapsules
Prior art date
Application number
PCT/JP2022/037143
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English (en)
Japanese (ja)
Inventor
航平 戸田
芳久 渡部
広嗣 中島
真路 煙上
Original Assignee
ユニ・チャーム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ユニ・チャーム株式会社 filed Critical ユニ・チャーム株式会社
Publication of WO2023068036A1 publication Critical patent/WO2023068036A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers

Definitions

  • the present invention relates to absorbent articles.
  • microcapsules that enclose such functional agents the function of the functional agents usually does not manifest unless the microcapsules are broken and the encapsulated functional agents are released to the outside. Therefore, in normal use of diapers and the like, the microcapsules are less likely to be broken, and the function of the functional material may not be sufficiently exhibited during use of the diaper. In addition, when the microcapsules are detached from the surface of the diaper or the like, it may become difficult for the function of the functional material to manifest when the diaper is used.
  • the present invention has been made in view of the conventional problems as described above, and its purpose is to provide an absorbent article capable of exhibiting the function of a functional material at an appropriate timing.
  • the main invention for achieving the above object has a longitudinal direction, a lateral direction, and a thickness direction in an unfolded and stretched state, and an absorbent core and a non-skin side of the absorbent core in the thickness direction. and a liquid-impermeable sheet provided in the absorbent article, wherein in the central region located in the center when divided into three equal parts in the longitudinal direction, more than the liquid-impermeable sheet
  • the absorbent article is characterized in that it has a carrier layer carrying microcapsules containing a functional agent on the non-skin side in the thickness direction.
  • FIG. 1 is a schematic perspective view of a diaper 1;
  • FIG. 1 is a plan view of diaper 1 in an unfolded and stretched state;
  • FIG. 3 is a schematic cross-sectional view taken along line AA of FIG. 2;
  • 4A is a plan view of the absorbent main body 10 in an unfolded and stretched state, and
  • FIG. 4B is a cross-sectional schematic diagram of the absorbent main body 10.
  • FIG. 4 is a diagram for explaining the arrangement of a carrier layer 60;
  • FIG. 6A to 6D are diagrams for explaining formation patterns of the carrier layer 60.
  • FIG. It is a figure showing the modification of the carrier layer 60 provided in the diaper 1.
  • FIG. 8A and 8B are diagrams showing other modifications of the carrier layer 60 provided in the diaper 1.
  • FIG. 9A is a plan view of diaper 2 in an unfolded and stretched state.
  • FIG. 9B is a schematic cross-sectional view taken along line FF of FIG. 9A.
  • FIG. 10A is a schematic plan view of the napkin 3 viewed from the skin side in the thickness direction.
  • FIG. 10B is a schematic plan view of the napkin 3 viewed from the non-skin side in the thickness direction.
  • FIG. 11 is a schematic cross-sectional view taken along line GG in FIG. 10A.
  • An absorbent core having a vertical direction, a horizontal direction, and a thickness direction in an unfolded and stretched state, and a liquid-impermeable sheet provided on the non-skin side in the thickness direction of the absorbent core.
  • An absorbent article having an absorbent main body comprising: An absorbent article comprising a carrying layer carrying microcapsules containing a functional agent.
  • the microcapsules since the microcapsules are carried by the carrier layer on the non-skin side of the liquid-impermeable sheet, the microcapsules may fall off or the functional material may be contained in the absorbent core. Intrusion is suppressed. Since the microcapsules are carried in the central region in the vertical direction located in the wearer's crotch region, the microcapsules are naturally broken when the wearer's body pressure is applied or the wearer moves the legs. As a result, the functional material is easily released even in normal usage of the absorbent article. As a result, the function of the functional material can be easily exhibited at an appropriate timing.
  • This absorbent article comprises a waist member positioned around the wearer's waist when worn, and when viewed in the thickness direction in an unfolded and stretched state, the waist member overlaps the absorbent main body. It is desirable to have at least part of the carrier layer in part.
  • the portion where the waist member and the absorbent main body overlap is thicker than the non-overlapping portion, and body pressure is likely to be applied when worn. Therefore, when worn, the microcapsules are naturally broken and the functional material is easily released, so that the function of the functional material can be exhibited at a more appropriate timing.
  • the waist member has a sheet member with a plurality of openings, and when viewed in the thickness direction in an unfolded and stretched state, the openings and the carrier layer are separated from each other. It is desirable that there is an overlap between
  • the functional material released from the microcapsules can easily pass through the openings and move in the thickness direction of the waist member. This makes it easier for the functional material to diffuse from the waist member into the atmosphere, and the function of the functional material can be exhibited more effectively.
  • This absorbent article has a pair of fastening tapes on both sides in the horizontal direction, and has an elastic region that stretches and contracts in the horizontal direction between the pair of fastening tapes in the horizontal direction. It is desirable to have at least part of the carrier layer in a portion overlapping with the elastic region when viewed in the thickness direction in the stretched state.
  • the area of the carrier layer on the front side of the longitudinal center position is equal to or larger than the area of the carrier layer on the rear side of the longitudinal center position.
  • the amount of microcapsules arranged on the front side tends to be larger than the amount of microcapsules arranged on the rear side. Therefore, when the wearer lies face down or moves both legs significantly forward during walking, pressure is applied to the front side of the absorbent article and the microcapsules are likely to break. This makes it easier to release the functional material in the front region.
  • the area of the carrier layer on the front side of the longitudinal center position is smaller than the area of the carrier layer on the rear side of the longitudinal center position.
  • the amount of microcapsules arranged on the rear side tends to be larger than the amount of microcapsules arranged on the front side. Therefore, when the wearer is lying on his or her back or when the wearer is sitting, pressure is applied to the back side of the absorbent article and the microcapsules are likely to break. This makes it easier to release the functional material in the rear area.
  • This absorbent article has an exterior sheet on the non-skin side in the thickness direction of the liquid-impermeable sheet, and the carrier layer is disposed between the liquid-impermeable sheet and the exterior sheet. It is desirable to have an adhesive for bonding the liquid-impermeable sheet and the exterior sheet.
  • the carrier layer contains an adhesive
  • the microcapsules are more likely to be fixed more firmly and are less likely to be misaligned.
  • the carrier layer is sandwiched between the liquid-impermeable sheet and the exterior sheet, the microcapsules are prevented from immediately detaching from the absorbent article. Therefore, the state in which the microcapsules are held by the carrier layer is easily maintained, and the function of the functional material can be easily exhibited at an appropriate timing.
  • Such an absorbent article has an adhesive layer provided between the liquid-impermeable sheet and the outer sheet to join the liquid-impermeable sheet and the outer sheet, wherein the adhesive layer is It is desirable that the microcapsules are not contained or that the density of the microcapsules is lower than that of the carrier layer.
  • the adhesive layer separately from the carrier layer, the liquid-impermeable sheet and the exterior sheet are joined more firmly. It becomes easier for the layer to hold the microcapsules more stably. As a result, the function of the functional material can be easily exhibited at an appropriate timing.
  • the carrier layer and the adhesive layer when viewed in the thickness direction in an unfolded and stretched state, have portions that do not overlap in the longitudinal direction. desirable.
  • the rigidity of the absorbent body is lower than in the overlapping portion, so that when the absorbent article is worn, , the absorbent main body becomes flexible and easily deformable. Therefore, by adjusting the region where the carrier layer is formed, it is possible to partially vary the flexibility of the absorbent body. Also, by providing a portion where the carrier layer is discontinuous, it is possible to reduce the cost associated with arranging the microcapsules.
  • the carrier layer has a portion that overlaps with the absorbent core when viewed in the thickness direction in an unfolded and stretched state.
  • the absorbent core functions like a base when body pressure is applied during wearing,
  • the microcapsules carried by the carrier layer are easily broken, and the functional material is easily released. Thereby, the function of the functional material can be easily exhibited when the absorbent article is used.
  • the carrier layer has a portion that does not overlap with the absorbent core when viewed in the thickness direction in the unfolded and stretched state.
  • the portion of the absorbent main body that does not overlap with the highly rigid absorbent core has high flexibility, and the absorbent main body is easily deformed according to the movement of the wearer's body. . Therefore, as the absorbent main body deforms, an external force acts on the microcapsules, making them more likely to break and release the functional material. Thereby, the function of the functional material can be easily exhibited when the absorbent article is used.
  • the user can easily recognize the position of the carrier layer (microcapsules) by visually recognizing the display. Become. Therefore, it is possible to make the function of the functional material appear more easily than in the case where no display is provided.
  • an underpants-type disposable diaper (hereinafter also referred to as "diaper 1") will be described as an example.
  • the absorbent article according to the first embodiment includes shorts-type napkins and other absorbent articles having a pants (shorts) shape.
  • FIG. 1 is a schematic perspective view of a diaper 1.
  • FIG. FIG. 2 is a plan view of the diaper 1 in an unfolded and stretched state.
  • FIG. 3 is a schematic cross-sectional view taken along line AA of FIG.
  • the "unfolded state" of the diaper 1 is a state in which the pair of side joints 50, 50 provided on both sides of the diaper 1 are separated, and the diaper 1 is opened and unfolded in a plane.
  • the “stretched state” of the diaper 1 means a state in which the entire diaper 1 (whole product) is stretched without wrinkles, specifically, each member constituting the diaper 1 (for example, the absorbent main body 10 described later, It refers to a state in which the waistline member 20, etc.) is stretched until its dimensions match or are close to the dimensions of the member alone.
  • the diaper 1 In the underpants-type state shown in FIG. 1, the diaper 1 has vertical, horizontal, and longitudinal directions that intersect with each other, and has a waist opening BH and a pair of leg openings LH, LH.
  • the upper side in the vertical direction corresponds to the waist opening BH side, and the lower side corresponds to the crotch side.
  • the front side in the front-rear direction corresponds to the wearer's ventral side, and the rear side corresponds to the wearer's dorsal side.
  • the diaper 1 In the unfolded state of FIG. 2, the diaper 1 has a vertical direction and a horizontal direction that intersect each other.
  • the vertical direction is the vertical direction in FIG. 1 and corresponds to the longitudinal direction of the absorbent body 10 .
  • the horizontal direction is the direction along the horizontal direction in FIG. Also, as shown in FIG. 3, the direction in which the materials forming the diaper 1 are laminated is defined as the thickness direction. Let the side which touches a wearer's skin in a thickness direction be a skin side, and let the other side be a non-skin side.
  • the diaper 1 has a liquid-absorbing absorbent main body 10 and a waist member 20 which is disposed on the non-skin side of the absorbent main body 10 and which forms part of the waist opening BH and the leg openings LH, LH. ing.
  • the waist member 20 has a front waist portion 30 corresponding to the front body of the diaper 1 and a rear waist portion 40 corresponding to the back body of the diaper 1 . That is, the diaper 1 of this embodiment has an absorbent main body 10 as a first part that is applied to the wearer's crotch area and absorbs excrement such as urine, and as a second part, an absorbent main body 10 that is attached to the wearer's abdomen.
  • the diaper 1 is not limited to the three-piece type shown in FIG.
  • it may be a so-called two-piece pants-type diaper that includes a waist member 20 in which a front body and a back body are formed as one piece, and an absorbent main body 10 .
  • the front waistline portion 30 and the rear waistline portion 40 are arranged in parallel with each other with a gap in the vertical direction, and the absorbent main body 10 is stretched between them. Then, the ends 10ea and 10eb in the longitudinal direction (corresponding to the vertical direction in FIG. 2) of the absorbent body 10 are joined and fixed to the skin sides of the nearest waistlines 30 and 40 via body joints (not shown), respectively. It is That is, at the portion where the absorbent main body 10 and the front waistline portion 30 overlap in the thickness direction, the non-skin side surface of the absorbent main body 10 and the skin side surface of the front waistline portion 30 are joined by a bonding material such as a hot-melt adhesive. are joined together (see FIGS.
  • the non-skin side surface of the absorbent main body 10 and the back waist part 40 are bonded together by a bonding material such as a hot-melt adhesive. is joined to the skin side of the
  • the absorbent main body 10 is folded in two with the vertical central position CL as the folding position (folding line).
  • the front waist portion 30 and the rear waist portion 40 facing each other in this folded state are joined and connected to each other at the side portions 30sw and the side portions 40sw on both sides in the left-right direction, and the pair of side joint portions 50, 50 It is formed.
  • the waist member 20 has side joints 50, 50 that join the front waist part 30 and the rear waist part 40 at both ends in the left-right direction.
  • a rear waist portion 40 is formed in an annular shape.
  • the side joints 50 are formed by known joining means such as welding and adhesion.
  • FIG. 4A is a plan view of the absorbent main body 10 in an unfolded and stretched state
  • FIG. 4B is a cross-sectional schematic diagram of the absorbent main body 10.
  • the absorbent main body 10 includes an absorbent core 11 which is provided closer to the skin than the waist member 20 and absorbs excrement, a top sheet 12 which is arranged closer to the skin than the absorbent core 11 in the thickness direction, and an absorbent body. and a back sheet 13 arranged on the non-skin side of the elastic core 11. - ⁇ However, the absorbent main body 10 may be provided with sheet members other than this. For example, a second sheet (not shown in FIG. 4B) may be provided between the top sheet 12 and the absorbent core 11 in the thickness direction. Further, the absorbent main body 10 is provided with a carrying layer 60 carrying microcapsules containing a functional agent. The carrier layer 60 will be described later.
  • the absorbent core 11 is a member that absorbs and retains excretions such as urine, and in the diaper 1 is formed of liquid-absorbent fibers such as pulp fibers mixed with superabsorbent polymer (SAP).
  • SAP superabsorbent polymer
  • the absorbent core 11 may be covered with a liquid-permeable sheet member (core wrap sheet 11b) such as tissue paper or non-woven fabric.
  • the absorbent core 11 of this embodiment has a constricted portion 11c with a narrower width in the left-right direction between the front end and the rear end in the longitudinal direction. It has a substantially hourglass shape.
  • the constricted portion 11c is a portion that is sandwiched between the legs of the wearer when the diaper 1 is worn. becomes easier to fit the crotch of the wearer.
  • the top sheet 12 is a liquid-permeable sheet, and for example, a hydrophilic air-through nonwoven fabric, a spunbond nonwoven fabric, or the like is used.
  • a hydrophilic air-through nonwoven fabric for example, a hydrophilic air-through nonwoven fabric, a spunbond nonwoven fabric, or the like is used.
  • both lateral side portions of the top sheet 12 are folded back from the skin side to the non-skin side in the thickness direction so as to wrap the absorbent core 11.
  • the back sheet 13 has a two-layer structure of a liquid-impermeable sheet 13a and a hydrophobic exterior sheet 13b arranged on the non-skin side thereof.
  • a liquid-impermeable sheet 13a for example, a resin film or the like is used
  • the exterior sheet 13b for example, a flexible non-woven fabric is used.
  • a pair of leak-proof walls 15 are provided along the vertical direction (longitudinal direction of the absorbent body 10) on both sides of the absorbent body 10 in the left-right direction.
  • the leak-proof wall portion 15 is formed of the exterior sheet 13b described above. Specifically, in the left-right direction (horizontal direction), while a part of the exterior sheet 13b extends outward from both ends of the absorbent core 11, it is folded at a plurality of points toward the skin side as shown in FIG. A pair of leak-proof walls 15 are formed.
  • a leak-proof wall elastic member 16 such as rubber thread is attached to the skin-side end (tip) of the leak-proof wall portion 15 in a state of being stretched along the longitudinal direction (longitudinal direction of the absorbent main body 10). .
  • the leak-proof wall portion 15 stands up against the wearer's skin and fits the wearer's crotch due to the stretchability of the leak-proof wall elastic member 16 .
  • leg elastic members 17 such as rubber threads are attached in a state of being elongated along the vertical direction (longitudinal direction of the absorbent main body 10).
  • both sides of the absorbent main body 10 contract due to the stretchability exhibited by the leg elastic members 17, and the absorbent body 10 easily fits around the wearer's legs.
  • the front waist portion 30 includes a skin-side sheet 31 arranged on the skin side in the thickness direction and a non-skin-side sheet laminated so as to be adjacent to the non-skin side of the skin-side sheet 31. and a waist elastic member 35 provided between the skin-side sheet 31 and the non-skin-side sheet 32 in the thickness direction.
  • the skin-side sheet 31 and the non-skin-side sheet 32 are rectangular sheet members as shown in FIG.
  • the surface of the non-skin side sheet 32 may be provided with a plurality of openings 32h as shown in the partially enlarged view of FIG.
  • the opening portion 32h is a through hole that penetrates the non-skin side sheet 32 in the thickness direction.
  • Each opening 32h can have a circular shape with a diameter of about 1 mm, for example, but the shape and arrangement (number and pattern) of the openings 32h can be changed as appropriate. However, the opening 32h may not necessarily be provided.
  • the upper end portion (the front end portion in the longitudinal direction) of the non-skin side sheet 32 has a folded portion 32f that is folded back from the non-skin side to the skin side and from the front side to the rear side in the longitudinal direction.
  • a portion (upper end portion) of the skin-side sheet 31 is covered with the folded portion 32f to prevent the upper edge of the skin-side sheet 31 from digging into the wearer's skin.
  • the folded portion 32f may not necessarily be provided.
  • the waist elastic members 35 are formed of, for example, thread rubber, and are arranged in plurality between the skin-side sheet 31 and the non-skin-side sheet 32 at intervals in the vertical direction (longitudinal direction) and extend in the horizontal direction. installed with the Due to the stretchability exhibited by the waist elastic member 35, the front waist portion 30 fits around the abdomen of the wearer.
  • Attachment of the waist elastic member 35 can be performed using an adhesive such as a hot-melt adhesive.
  • the waist elastic member 35 can be attached by applying a hot-melt adhesive to the waist elastic member 35, extending it at a predetermined elongation ratio, and sandwiching it between the skin-side sheet 31 and the non-skin-side sheet 32. That is, the skin-side sheet 31 and the non-skin-side sheet 32 are joined with an adhesive via the waist elastic member 35 .
  • the waist elastic member 35 may be attached by applying adhesive to the skin-side sheet 31 and non-skin-side sheet 32 sides.
  • each waist elastic member 35 is vertically moved using a plurality of welding parts formed during welding.
  • the waist elastic member 35 may be attached by pinching.
  • the waist elastic member 35 is partially cut in the left-right direction to form a region that does not exhibit stretchability or that has weakened stretchability. good.
  • the front waist portion 30 and the absorbent main body 10 overlap as shown in FIG. direction can be suppressed from shrinking.
  • the front waist part 30 may have a skin sheet 36 .
  • the skin sheet 36 is a sheet member arranged to cover the upper end (the front end in the longitudinal direction) of the absorbent body 10 from the skin side, and functions as a cover sheet. have. This prevents the top edge of the absorbent body 10 from digging into the wearer's skin when the diaper 1 is worn.
  • the skin sheet 36 is made of, for example, SMS nonwoven fabric.
  • the rear waist portion 40 has substantially the same configuration as the front waist portion 30 . That is, the back waist portion 40 includes a skin-side sheet 41 arranged on the skin side in the thickness direction, a non-skin-side sheet 42 laminated so as to be adjacent to the non-skin side of the skin-side sheet 41, and a skin-side sheet. and a plurality of waist elastic members 45 provided between the sheet 41 and the non-skin side sheet 42 in the thickness direction. Further, similarly to the front waist portion 30, it may have an opening portion 42h, a folded portion 42f, a skin sheet 46, and the like (see FIGS. 2 and 3). Since the configuration of each member is substantially the same as that of the front waist portion 30, description thereof will be omitted.
  • the external shape of the rear waist portion 40 is different from that of the front waist portion 30 .
  • the rear waist portion 40 has a buttock cover 40b having a substantially trapezoidal shape below the side joint portion 50 (side portion 40sw) in the vertical direction.
  • the buttock cover 40b is a portion whose width in the horizontal direction (horizontal direction) is narrowed from the upper side to the lower side in the vertical direction. The provision of the buttock cover 40b allows the rear waist portion 40 to widely cover the wearer's buttocks when the diaper 1 is worn.
  • the absorbent main body 10 of the diaper 1 is provided with a carrier layer 60 carrying microcapsules containing a functional agent.
  • the microcapsules and carrier layer 60 are described below.
  • microcapsule is a capsule (membrane material) having a diameter of 1 to 1000 ⁇ m and having a space for enclosing a functional agent.
  • Materials for the microcapsules include urethane resin, gelatin, gelatin/gum arabic, melamine resin, urea, formalin resin, sugars, and the like.
  • microcapsules made of melamine resin are used.
  • microcapsules are particularly useful if physical stimuli (e.g., pressure, shock, heat, vibration, light, etc.) cause the film material to collapse (break) and release the encapsulated functional agent. Not restricted.
  • the microcapsules are not particularly limited in external shape as long as they contain the functional agent (core material) and can control the release of the functional agent (core material). and other external shapes.
  • the microcapsule may be a mononuclear type having one space for holding a functional agent (core material), a multinuclear type having multiple spaces for holding a functional agent (core material), or a microcapsule having a core substance in the form of fine particles inside the particle. It can be a matrix type structure in which is dispersed or a structure in which a liquid core substance is impregnated. Examples of the shape of the space include a spherical shape, an irregular shape, and the like.
  • Functional agents encapsulated in microcapsules include, for example, cooling agents and insect repellents (hereinafter simply referred to as repellents).
  • cooling agents those commonly known in the art as cooling agents can be used, but they are volatile and act on receptor-activated channels (TRPM8) in nerves in the skin.
  • TRPM8 receptor-activated channels
  • menthol eg, l-menthol
  • its derivatives eg, menthyl lactate
  • methyl salicylate eg, camphor
  • cucumber extract eg, essential oils derived from plants (eg, mint, eucalyptus, nutmeg), and the like.
  • Repellents are repellents (insect repellents) for pests such as mosquitoes, silkworms, midges, and flies, and are synthetic compounds and natural plant extracts containing ingredients that have insect repellent effects.
  • pests such as mosquitoes, silkworms, midges, and flies
  • synthetic compounds and natural plant extracts containing ingredients that have insect repellent effects For example, citronellal, 1,8-cineole, linalyl acetate, deet (N,N-diethyl-3-methylbenzamide), sesquiterpenes, ethyl butyl acetylaminopropionate, picaridin, pyrethroids, cinnamon, rosemary, lavender, peppermint. , eucalyptus, citronella, lemon eucalyptus, turmeric, etc.
  • the repellent can be selected according to target pests and wearers.
  • functional agents are not limited to cooling agents and repellents.
  • it may be perfume.
  • a method of providing microcapsules in an absorbent article such as the diaper 1 a method of applying a liquid in which microcapsules are dispersed to a material such as a nonwoven fabric constituting the absorbent article has been used.
  • the liquid (dispersion medium) in which the microcapsules are dispersed is preferably a liquid that does not dissolve or swell the microcapsules and retains the function of the functional agent. For example, water or the like has been used.
  • FIG. 5 is a diagram illustrating the arrangement of the carrier layer 60. As shown in FIG. FIG. 5A shows the arrangement of the carrier layer 60 in the hatched area in the diaper 1 in the unfolded and stretched state.
  • Figure 5B represents a schematic cross-section of the absorbent body 10 of Figure 5A.
  • the carrier layer 60 is a layered portion laminated on the non-skin side in the thickness direction of the liquid-impermeable sheet 13 a of the absorbent body 10 .
  • the carrier layer 60 is made of a hot-melt adhesive (HMA) that joins the liquid-impermeable sheet 13a and the exterior sheet 13b in the thickness direction. That is, the support layer 60 is formed by applying a hot-melt adhesive in which microcapsules as described above are dispersed at a predetermined ratio to a predetermined region of the non-skin side surface of the liquid-impermeable sheet 13a.
  • the carrier layer 60 made of hot-melt adhesive can stably hold (carry) the microcapsules.
  • the carrier layer 60 may be formed of a substance other than the hot-melt adhesive (HMA) as long as a layer capable of stably holding the microcapsules can be formed.
  • the carrier layer 60 may be formed using substances such as glycerin, vegetable oil, gel, and PEG (polyethylene glycol). All of these substances are difficult to volatilize easily and are harmless to the human body, so they are suitable for forming a layer (carrying layer 60) carrying microcapsules in absorbent articles such as diapers.
  • the substance such as the hot-melt adhesive forming the carrier layer 60 is in contact with the non-woven fabric (outer sheet 13b in the diaper 1) in the thickness direction, part of the hot-melt adhesive (the carrier layer 60) is the non-woven fabric. may be impregnated between the fibers that make up the However, it is unlikely that the entire hot-melt adhesive or the like will soak into the nonwoven fabric (outer sheet 13b), and the function as the carrier layer 60 that carries the microcapsules is maintained.
  • the hot-melt adhesive or the like forming the carrier layer 60 is provided on the side opposite to the absorbent core 11 in the thickness direction with the liquid-impermeable sheet 13a interposed therebetween. That is, the hot-melt adhesive is arranged at a position where it is difficult for it to come into direct contact with the absorbent core 11 . With such an arrangement, it is possible to prevent the functional material released from the microcapsules and the hot-melt adhesive itself from being absorbed by the absorbent core 11, so that the carrier layer 60 can be formed more stably and easily. .
  • the carrier layer 60 is arranged so as to overlap at least part of the central region FC.
  • the central region FC is a region located in the wearer's crotch region when the diaper 1 is worn. In other words, when the diaper 1 is worn, the microcapsules are held in the wearer's crotch region. When the diaper 1 is put on, body pressure of the wearer is likely to be applied to the central region FC, so that the microcapsules are easily broken and the functional material is easily released from the inside.
  • the crotch portion central region FC
  • the crotch portion central region FC
  • external force is applied to or rubbed against the microcapsules, causing the microcapsules to break and the functional material to break. is more likely to be released. Therefore, the function of the functional material can be naturally exhibited in the normal usage of the diaper 1 .
  • the microcapsules are carried by the carrying layer 60 on the non-skin side in the thickness direction of the liquid-impermeable sheet 13a. Impregnation into the sexual core is suppressed. Since the microcapsules are carried in the longitudinal central region FC located in the wearer's crotch region, the microcapsules are naturally broken when the wearer moves his/her legs, and the diaper 1 is normally worn. The functional material is easily released even in the mode of use. Thereby, the function of the functional material can be exhibited at appropriate timing.
  • the carrier layer 60 provided on the diaper 1 preferably has an area on the front side of the longitudinal center position CL that is greater than or equal to the area on the rear side of the longitudinal center position CL.
  • the amount of microcapsules arranged on the front side (abdominal side) of the diaper 1 tends to be larger than the amount of microcapsules arranged on the rear side (back side). Therefore, for example, when the wearer of the diaper 1 is lying face down, or when the wearer of the diaper 1 moves their legs significantly forward during walking, pressure is likely to be applied to the front side of the diaper 1.
  • the microcapsules are easily broken, and the functional material can be easily released.
  • the area of the carrier layer 60 on the front side of the longitudinal center position CL may be smaller than the area of the carrier layer 60 on the rear side of the longitudinal center position CL.
  • the amount of microcapsules arranged on the rear side (dorsal side) of the diaper 1 tends to be larger than the amount of microcapsules arranged on the front side (abdominal side). Therefore, for example, when the wearer of the diaper 1 is lying on his or her back or when the wearer is sitting, pressure is likely to be applied to the rear side of the diaper 1, and the microcapsules are broken on the rear side of the diaper 1. It becomes easier to release the functional material.
  • the carrier layer 60 is formed of an adhesive such as a hot melt adhesive (HMA), and the carrier layer 60 has the function of carrying the microcapsules, It had the function of joining with 13b. Since the carrier layer 60 contains an adhesive, the microcapsules can be easily fixed and can be prevented from being dislocated. Since the carrier layer 60 carrying the microcapsules is sandwiched between the liquid-impermeable sheet 13a and the exterior sheet 13b, the microcapsules are prevented from immediately coming off the diaper 1. be done. For example, even if a certain microcapsule is displaced from being supported by the carrier layer 60, movement in the thickness direction is restricted by the liquid-impermeable sheet 13a and the exterior sheet 13b.
  • HMA hot melt adhesive
  • the state in which the microcapsules are carried by the carrier layer 60 is easily maintained throughout the period of use of the diaper 1, and the function of the functional material can be easily exhibited at an appropriate timing.
  • an adhesive layer 70 made of an adhesive such as a hot-melt adhesive is provided between the liquid-impermeable sheet 13a and the exterior sheet 13b separately from the carrier layer 60.
  • the sheet 13a and the exterior sheet 13b may be joined together.
  • adhesive is applied to strip-shaped regions extending in the vertical direction, and a plurality of such strip-shaped regions are arranged at intervals in the horizontal direction to form a layered adhesive layer 70 of the adhesive.
  • the liquid-impermeable sheet 13a and the exterior sheet 13b are joined more firmly, so that the microcapsules are held by the carrier layer 60 sandwiched between the sheets. It becomes easier to carry more stably. Therefore, it is possible to make it easier for the functional material to exhibit its function at an appropriate timing.
  • the adhesive layer 70 may also contain microcapsules. It shall be smaller than the density (containment density) of the microcapsules. The lower the density of the microcapsules, the less impurities, so that the liquid-impermeable sheet 13a and the exterior sheet 13b are more likely to be firmly joined together. Therefore, it is desirable that the adhesion layer 70 has a lower density of microcapsules than the carrier layer 60 .
  • the carrier layer 60 is intermittently arranged from one end to the other end of the absorbent main body 10 in the longitudinal direction.
  • the carrier layer 60 has discontinuities in the longitudinal direction.
  • the carrier layer 60 has discontinuous portions at the front and rear ends in the longitudinal direction of the absorbent body 10 .
  • portions where the carrier layer 60 and the adhesive layer 70 overlap and portions where they do not overlap are formed.
  • the rigidity of the absorbent body 10 is lower than that in the overlapping portion, so that the absorbent body 10 becomes flexible when the diaper 1 is worn. Easier to transform.
  • the area where the carrier layer 60 is formed it is possible to partially vary the flexibility of the absorbent body 10 .
  • the microcapsules functional material
  • providing a portion where the carrier layer 60 is discontinuous makes it possible to arrange the microcapsules. Cost can be reduced.
  • the carrier layer 60 of the diaper 1 has a portion of the absorbent main body 10 that overlaps with the absorbent core 11 when viewed in the thickness direction (see FIG. 5A, etc.).
  • the absorbent core 11 functions like a base when the body pressure of the wearer is applied when the diaper 1 is worn, and the microscopic The capsule is easily broken, and the functional material is easily released. Therefore, since the carrier layer 60 has a portion that overlaps with the absorbent core 11, the function of the functional material can be easily exhibited when the diaper 1 is used.
  • the liquid-impermeable sheet 13a is arranged between the absorbent core 11 and the carrier layer 60, the functional material released from the microcapsules is immediately absorbed by the absorbent core 11. It is difficult to cause problems such as
  • the carrier layer 60 of the diaper 1 has a portion of the absorbent main body 10 that does not overlap with the absorbent core 11 when viewed in the thickness direction (see FIG. 5A, etc.).
  • a portion of the absorbent main body 10 that does not overlap with the highly rigid absorbent core 11 has high flexibility, and the absorbent main body 10 is easily deformed according to the movement of the wearer's body. Therefore, an external force is likely to act on the microcapsules as the absorbent body 10 deforms, and the microcapsules are likely to break and release the functional material. Therefore, since the carrying layer 60 has a portion that does not overlap with the absorbent core 11, the function of the functional material can be easily exhibited when the diaper 1 is used.
  • the carrier layer 60 is formed by applying a hot-melt adhesive or the like to the hatched area in FIG. 5A, but the adhesive coating pattern is changed as follows.
  • can be 6A to 6D are diagrams for explaining formation patterns of the carrier layer 60.
  • FIG. 6A to 6D are diagrams for explaining formation patterns of the carrier layer 60.
  • FIG. 6A shows an example in which the carrier layer 60 is formed in a so-called solid pattern by uniformly coating the hot-melt adhesive in the predetermined area indicated by the hatched area by a coater coating or the like. showing.
  • FIG. 6B shows an example in which the carrier layer 60 is formed by arranging a plurality of patterns in which the hot-melt adhesive is applied in longitudinal strips at intervals in the width direction.
  • FIG. 6C shows an example in which the carrier layer 60 is formed of a plurality of strips of hot-melt adhesive applied in a predetermined region in a spiral or wavy shape by spiral coating or ⁇ coating.
  • FIG. 6A shows an example in which the carrier layer 60 is formed in a so-called solid pattern by uniformly coating the hot-melt adhesive in the predetermined area indicated by the hatched area by a coater coating or the like. showing.
  • FIG. 6B shows an example in which the carrier layer 60 is formed by arranging a plurality of patterns in which the hot-melt adhesive is applied in
  • the carrier layer 60 is formed by arranging a plurality of hot-melt adhesives so that parts of the hot-melt adhesive overlap each other and are entangled with each other.
  • FIG. 6D shows an example in which the carrier layer 60 is formed by arranging a plurality of spirally or wave-coated hot melt adhesives so as not to overlap each other.
  • the carrier layer 60 formed with each pattern shown in FIGS. 6A to 6D is capable of carrying microcapsules. , the retention of microcapsules is different.
  • the area of the hot-melt adhesive (medium constituting the carrier layer) coated in the region surrounded by the maximum length H60 in the longitudinal direction and the maximum width W60 in the lateral direction of the carrier layer 60 is shown in FIG.
  • the pattern of is the largest, and becomes smaller in the order of FIGS. 6B, 6C, and 6D.
  • the higher the holding power of the microcapsules the more difficult it is for the microcapsules to break during use of the diaper 1, and thus the more difficult it is for the functional material to be released and the more difficult it is for the function of the functional material to manifest itself.
  • the hot melt adhesive when the hot melt adhesive is arranged in a sparse manner so as not to overlap each other as shown in FIG. 6D, the hot melt adhesive has a large surface area. easy to become Therefore, the functional material is easily released from the microcapsules. Conversely, when the hot-melt adhesive is applied densely in a plane as shown in FIG. 6A, the surface area of the hot-melt adhesive tends to be small, making it difficult to release the functional material from the microcapsules. That is, the pattern of FIG. 6D is the most likely to exhibit the function of the functional material, and the pattern of FIG. 6C, FIG. 6B, and FIG.
  • the function of the functional material can be easily expressed or expressed by changing the coating pattern or coating area of the hot melt adhesive. can be made difficult.
  • the smaller the hot-melt adhesive coating area as shown in FIG. 6D the more easily the function of the functional material is exhibited. function can be made difficult to express.
  • the larger the surface area of the coated hot-melt adhesive the easier it is for the function of the functional material to manifest, and the smaller the surface area, the more difficult it is for the functional material to manifest its function.
  • the hot-melt adhesive is applied in the central region FC located in the wearer's crotch region when the diaper 1 is worn.
  • the hot-melt adhesive is applied in the region where the wearer's legs are likely to come into contact (that is, the region where the microcapsules are likely to break).
  • the hot-melt adhesive is applied to a smaller area (larger surface area) to function. It is possible to make it easier to express the function of the material.
  • By appropriately adjusting the coating pattern of the hot-melt adhesive in this way it becomes possible to exhibit the function of the functional material at a more appropriate timing.
  • FIG. 7 is a diagram showing a modification of the carrier layer 60 provided in the diaper 1, and is a diagram corresponding to FIG. 7, a central carrier layer 60C corresponding to the carrier layer 60 of FIG. 5 is provided in the central region FC. Furthermore, in the front region FF, a front carrying layer 60F is provided in a portion where the front waistline portion 30 and the absorbent main body 10 overlap when viewed in the thickness direction. Similarly, in the back region FB, a back carrier layer 60B is provided in a portion where the back waistline portion 40 and the absorbent main body 10 overlap when viewed in the thickness direction. That is, in this modified example, the carrier layer 60 is also provided in the portion where the waist member 20 and the absorbent main body 10 overlap when viewed in the thickness direction.
  • the overlapping portion of the waist member 20 and the absorbent main body 10 is thicker than the non-overlapping portion. becomes easier to apply. Therefore, since the microcapsules are carried by the carrier layer 60 (the front carrier layer 60F and the rear carrier layer 60B) in such a portion, the microcapsules are naturally broken when the body pressure is applied to function. The material is released, and the function of the functional material becomes easy to manifest. As a result, when the diaper 1 is worn, the function of the functional material can be easily exhibited at a more appropriate timing.
  • the front carrying layer 60F (rear The functional material released from the microcapsules carried on the side carrying layer 60B) passes through the openings 32h (42h) and easily moves from the skin side to the non-skin side of the waist member 20 in the thickness direction. Become. Therefore, the functional material (repellent, perfume, etc.) can be easily diffused into the atmosphere from the non-skin-side surface of the waist member 20, so that the function of the functional material can be exhibited more effectively.
  • FIG. 8A and 8B are diagrams showing other modifications of the carrier layer 60 provided in the diaper 1.
  • FIG. 8A the carrier layer 60 is provided continuously from one longitudinal end to the other longitudinal end of the absorbent body 10 .
  • the length (width) of the carrier layer 60 in the horizontal direction is shorter than in the cases of FIGS. 5A and 7A, and the carrier layer 60 as a whole is formed in a vertically long shape.
  • FIG. 8B the carrier layer 60 is formed wide enough to overlap the entire area of the adhesive layer 70 .
  • the carrier layer 60 is arranged on the non-skin side of the liquid-impermeable sheet 13a in the thickness direction and overlaps the central region FC in the longitudinal direction.
  • the function of the functional material can be exhibited at an appropriate timing.
  • the range of the carrier layer 60 it is possible to freely adjust the range in which the functional material is desired to appear and the bonding strength between the sheet members. It can increase the degree of freedom.
  • the diaper 1 may be provided with an indication indicating the position of the carrier layer 60 .
  • the non-skin-side surface of the absorbent body 10 is provided with a display portion 90 for indicating the position of the carrier layer 60 .
  • the user wearinger, guardian, etc.
  • the position of the carrier layer 60 microcapsules.
  • the content displayed on the display unit 90 include characters, graphics, and coloring different from other portions. It is desirable to have
  • FIG. 9A is a plan view of diaper 2 in an unfolded and stretched state.
  • FIG. 9B is a schematic cross-sectional view taken along line FF of FIG. 9A.
  • each direction for example, vertical direction, horizontal direction, etc.
  • FIGS. 9A and 9B is the same as each direction defined in the first embodiment.
  • the diaper 2 includes an absorbent core 11 that absorbs excrement, a liquid-permeable top sheet 12 positioned closer to the skin than the absorbent core 11, and The liquid-impermeable sheet 13a located on the non-skin side, the exterior sheet 25 located on the non-skin side of the liquid-impermeable sheet 13a, and the skin side on both sides in the left-right direction (lateral direction) of the top sheet 12. and a pair of side sheets 18 joined together.
  • leg-surrounding elastic members 17 for example, thread rubber
  • the absorbent core 11, the top sheet 12, and the liquid-impermeable sheet 13a of the diaper 2 are portions corresponding to the absorbent main body 10 of the diaper 1. It has the same function as the top sheet 12 and the liquid-impermeable sheet 13a.
  • the exterior sheet 25 of the diaper 2 is an exterior member corresponding to the waist member 20 of the diaper 1 .
  • the exterior sheet 25 is made of nonwoven fabric or the like.
  • the pair of side sheets 18 are made of the same liquid-permeable non-woven fabric as the top sheet 12, and at the inner ends of the side sheets 18 in the left-right direction, there is a leak-proof wall elastic member such as rubber thread that can be stretched in the longitudinal direction. 16 are provided.
  • a leak-proof wall elastic member such as rubber thread that can be stretched in the longitudinal direction. 16 are provided.
  • the left-right direction (horizontal direction) inner end portions of the side sheets 18 stand up on the wearer's skin side based on the contractile force exerted by the leak-proof wall elastic members 16 , similar to the diaper 1 .
  • a leak-proof wall portion 15 is formed.
  • a pair of fastening tapes 29 extending outward from both sides in the left-right direction (horizontal direction) are provided on the back side of the diaper 2 in the longitudinal direction.
  • a target sheet (not shown in FIG. 9) for engaging the fastening tape 29 when the diaper 2 is worn is provided on the non-skin side of the diaper 2 on the ventral side (front waist portion 30) in the longitudinal direction.
  • a hook-and-loop fastener 29f having a plurality of hook members is provided on the skin side surface of the fastening tape 29 on the free end side (left-right direction outer side).
  • a stretchable region 28 that can stretch in the horizontal direction.
  • the stretchable region 28 is formed by arranging a stretchable sheet member such as a stretchable nonwoven fabric or an elastic member such as a plurality of rubber threads in a predetermined region in a stretched state. When the diaper 2 is worn, the stretchability of the stretchable region 28 makes it easier for the portion sandwiched between the pair of fastening tapes 29, 29 to fit along the waist of the wearer.
  • a carrier layer 60 and an adhesive layer 70 similar to those of the diaper 1 are provided between the liquid-impermeable sheet 13a and the outer sheet 25 of the diaper 2 in the thickness direction.
  • the carrier layer 60 is a layer that carries microcapsules containing a functional material, and is formed of a hot-melt adhesive or the like.
  • the adhesive layer 70 is a joining portion for joining the liquid-impermeable sheet 13a and the exterior sheet 25 together.
  • the diaper 2 in the unfolded state shown in FIG. 9A When wearing the diaper 2, for example, the diaper 2 in the unfolded state shown in FIG. 9A is placed on the crotch portion of the wearer, and the region on the front side of the center position CL in the longitudinal direction is on the abdomen of the wearer. Applying, the area behind the central position CL in the longitudinal direction is applied to the back side (buttock side) of the wearer. Then, the pair of fastening tapes 29, 29 are wound along the waist of the wearer from the back side to the abdomen side, and the hook-and-loop fastener 29f is engaged with the target sheet on the abdomen side of the wearer. As a result, a waist opening BH and a pair of leg openings LH, LH, which are substantially similar to those of the diaper 1, are formed, and the position of the diaper 2 can be fixed with respect to the wearer's body (crotch portion).
  • the center region FC when vertically divided into three equal parts is located in the wearer's crotch. That is, as with the diaper 1, the microcapsules are held in the wearer's crotch region.
  • the crotch portion central region FC
  • the crotch portion is pinched between the legs or the like, thereby breaking the microcapsules and making it easier for the functional material to be released from the inside. Therefore, when the diaper 2 is worn, the function of the functional material can be exhibited at an appropriate timing.
  • the diaper 2 has a portion where the stretchable region 28 and the carrier layer 60 overlap when viewed in the thickness direction (see FIG. 9A).
  • the elastic region 28 provided between the fastening tapes 29, 29 laterally expands.
  • the carrying layer 60 that overlaps the stretchable region 28 is also pulled in the lateral direction, and the microcapsules held in this region are broken, facilitating the release of the functional material. Therefore, when the diaper 2 is put on, the function of the functional material can be easily exhibited.
  • FIG. 10A is a schematic plan view of the napkin 3 viewed from the skin side in the thickness direction.
  • FIG. 10B is a schematic plan view of the napkin 3 viewed from the non-skin side in the thickness direction.
  • FIG. 11 is a schematic cross section taken along line GG in FIG. 10A. The "longitudinal direction" in FIG.
  • the napkin 3 is a sheet-like member having a vertically long shape in plan view, and a liquid-permeable top sheet 26, a liquid-absorbing absorbent main body 10, and a liquid-impermeable back sheet 27 are arranged on the skin side in the thickness direction. It is laminated in order from the non-skin side to the non-skin side (see FIG. 11).
  • These members 26, 10, and 27 are respectively joined to adjacent members in the thickness direction with an adhesive HMA such as a hot-melt adhesive.
  • an adhesive HMA such as a hot-melt adhesive. Examples of the application pattern of the adhesive HMA include an ⁇ pattern, a spiral pattern, and a stripe pattern.
  • the planar shapes of the top sheet 26 and the back sheet 27 are the same, and their planar sizes are larger than the planar size of the absorbent body 10 .
  • the absorbent body 10 is held between the sheets 26 and 27 by bonding or welding the outer peripheral edges 26e and 27e of the sheets 26 and 27 to each other.
  • the approximately central portion in the longitudinal direction of the top sheet 26 and the back sheet 27 extends outward in the width direction, thereby serving as a fixing portion for placing and fixing the napkin 3 on underwear (not shown).
  • a wing portion 20w is formed.
  • the absorbent main body 10 has an absorbent core 11, a skin-side sheet 11t and a non-skin-side sheet 11s.
  • the absorbent core 11 is a member that absorbs and retains liquid such as menstrual blood (excreted fluid).
  • the absorbent core 11 has cellulose-based water-absorbent fibers, which are liquid-absorbent fibers, and thermoplastic resin fibers, and these fibers are mixed with each other, as shown by the dashed line in FIG. It is shaped vertically. Pulp fibers, for example, are used as the liquid-absorbing fibers.
  • thermoplastic resin fiber for example, a composite fiber having a so-called sheath-core structure in which the sheath is made of polyethylene (PE) and the core is made of polyethylene terephthalate (PET) is used.
  • a superabsorbent polymer as an example of the liquid-absorbent granules, a superabsorbent polymer (so-called SAP) similar to that of the diaper 1 may be used.
  • the skin-side sheet 11t is a sheet member having substantially the same planar shape as the absorbent core 11, and is joined with an adhesive HMA so as to cover the skin-side surface of the absorbent core 11.
  • a flexible sheet having excellent liquid permeability such as an air-through nonwoven fabric is used.
  • other types of non-woven fabric, tissue paper, etc. may be used.
  • the non-skin side sheet 11s is a sheet member having substantially the same planar shape as the absorbent core 11, and is joined with an adhesive HMA so as to cover the non-skin side of the absorbent core 11.
  • a flexible sheet such as SMS (spunbond/meltblown/spunbond) nonwoven fabric is used for the non-skin side sheet 11s.
  • other types of non-woven fabric, tissue paper, etc. may be used.
  • the top sheet 26 is a member that contacts the user's skin when the napkin 3 is in use, and allows liquid such as menstrual blood to permeate from the skin side to the non-skin side in the thickness direction and move to the absorbent main body 10 .
  • the top sheet 26 is formed of an appropriate nonwoven fabric such as an air-through nonwoven fabric, but other sheets may be used as long as they are liquid-permeable and flexible.
  • the skin side of the top sheet 26 is formed with a plurality of pressed portions E, E . It is pressed in the thickness direction and joined and integrated.
  • the compressed portions E linear compressed portions EL20 and dotted compressed portions ED20 are formed.
  • a plurality of linear compressed parts EL20 are formed continuously along the outer peripheral edge of the absorbent main body 10, thereby forming a substantially annular shape that is elongated in the longitudinal direction as a whole.
  • the pressed dotted portions ED20 are discretely formed in a substantially closed region defined on the top sheet 26 by the pressed linear portions EL20.
  • the back sheet 27 prevents the liquid that passes through the top sheet 26 and is absorbed by the absorbent main body 10 from seeping out to the clothing side (non-skin side) such as underwear when the napkin 3 is used. That is, the back sheet 27 of the napkin 3 is a member corresponding to the liquid-impermeable sheet 13 a of the diaper 1 .
  • the back sheet 27 is made of an appropriate resin film such as polyethylene (PE), but other sheets may be used as long as they are liquid-impermeable and flexible.
  • the non-skin side of the backsheet 27 is provided with a carrier layer 60 similar to that of the diaper 1 described above.
  • the carrier layer 60 is a layer that carries microcapsules containing a functional material, and is formed of a hot-melt adhesive or the like.
  • an adhesive portion 80 is formed for attaching and fixing the napkin 3 to the user's underwear or the like when the napkin 3 is used.
  • the adhesive portion 80 is formed at a portion between a pair of wing adhesive portions 80w formed in a substantially rectangular shape on the non-skin side surfaces of the wing portions 20w of the back sheet 27 and the pair of wing adhesive portions 80w in the width direction.
  • the main body adhesive portion 80c is formed by applying an appropriate adhesive HMA to a plurality of belt-like regions along the longitudinal direction at the overlapping portion of the back sheet 27 and the absorbent main body 10, as shown in FIG. 10B, for example. ing.
  • the body adhesive part 80c is attached to the inner side of the crotch part of the underwear, and the napkin 3 is worn together with the underwear, thereby adjusting the position of the absorbent body 10 with respect to the user's body. keep it from slipping.
  • the wing adhesive portion 80w is formed, for example, in a substantially rectangular shape by applying an appropriate adhesive HMA to the region where the wing portion 20w is formed.
  • the wing portions 20w are folded toward the non-skin side and folded back toward the center in the width direction, and the wing adhesive portions 80w are adhered to the outside of the crotch portion of the underwear.
  • the napkin 3 is fixed in such a manner that the crotch portion of the underwear is sandwiched between the main body adhesive portion 80c and the wing adhesive portion 80w, and misalignment and the like during use can be suppressed.
  • the center region FC when vertically divided into three equal parts is located in the crotch of the wearer. That is, as with the diaper 1, the microcapsules are held in the wearer's crotch region.
  • the crotch portion central region FC
  • the function of the functional material can be naturally exhibited.
  • the underpants type diaper 1, the tape type diaper 2, and the sanitary napkin 3 were explained as examples of the absorbent article, but the present invention is to form the carrier layer 60 at a predetermined position. It can also be applied to absorbent articles other than the above as long as the absorbent articles are capable of For example, a carrier layer 60 may be provided on a urine absorbing pad, panty liner, or the like to carry the microcapsules.
  • 1 diapers (absorbent articles, pants-type diapers), 2 diapers (absorbent articles, tape-type diapers), 3 napkins (absorbent articles, sanitary napkins), 10 absorbent body, 10ea superior (anterior, ventral), 10eb superior (posterior, dorsal), 11 absorbent core, 11b core wrap sheet, 11c neck portion, 11t skin side sheet, 11s non-skin side sheet, 12 topsheet, 13 back sheet, 13a liquid-impermeable sheet (film), 13b outer sheet, 15 leak-proof wall portion, 16 leak-proof wall elastic member, 17 leg elastic member, 18 side seats, 20 waist member, 20w wing part, 25 outer sheet, 26 top sheet, 26e outer peripheral edge, 27 back sheet, 27e outer peripheral edge, 28 elastic region, 29 fastening tape, 29f hook-and-loop fastener, 30 front girth, 31 skin-side sheet, 32 non-skin-side sheet, 32h aperture, 35 waist elastic member, 36 skin sheet, 40 rear waist part, 40

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

La présente invention concerne un article absorbant (1) qui comprend un corps principal absorbant (10) qui est pourvu d'un noyau absorbant (11) et d'une feuille imperméable aux liquides (13a) qui est disposée sur le côté non tourné vers la peau du noyau absorbant (11) dans la direction de l'épaisseur. Cet article absorbant (1) présente une couche de support (60), qui supporte des microcapsules qui contiennent un agent fonctionnel, sur le côté non tourné vers la peau de la feuille imperméable aux liquides (13a) dans la direction de l'épaisseur dans une région centrale (FC) qui est positionnée au centre si cet article absorbant est divisé en trois parties égales dans la direction longitudinale.
PCT/JP2022/037143 2021-10-20 2022-10-04 Article absorbant WO2023068036A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021171953A JP2023061803A (ja) 2021-10-20 2021-10-20 吸収性物品
JP2021-171953 2021-10-20

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WO2023068036A1 true WO2023068036A1 (fr) 2023-04-27

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PCT/JP2022/037143 WO2023068036A1 (fr) 2021-10-20 2022-10-04 Article absorbant

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JP (1) JP2023061803A (fr)
WO (1) WO2023068036A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012075569A (ja) * 2010-09-30 2012-04-19 Unicharm Corp 吸収性物品
JP2018050869A (ja) * 2016-09-28 2018-04-05 大王製紙株式会社 吸収性物品
JP2020179048A (ja) * 2019-04-26 2020-11-05 ユニ・チャーム株式会社 吸収性物品
WO2021205751A1 (fr) * 2020-04-06 2021-10-14 ユニ・チャーム株式会社 Article absorbant type culotte

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012075569A (ja) * 2010-09-30 2012-04-19 Unicharm Corp 吸収性物品
JP2018050869A (ja) * 2016-09-28 2018-04-05 大王製紙株式会社 吸収性物品
JP2020179048A (ja) * 2019-04-26 2020-11-05 ユニ・チャーム株式会社 吸収性物品
WO2021205751A1 (fr) * 2020-04-06 2021-10-14 ユニ・チャーム株式会社 Article absorbant type culotte

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