WO2019107192A1 - Article absorbant - Google Patents

Article absorbant Download PDF

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Publication number
WO2019107192A1
WO2019107192A1 PCT/JP2018/042536 JP2018042536W WO2019107192A1 WO 2019107192 A1 WO2019107192 A1 WO 2019107192A1 JP 2018042536 W JP2018042536 W JP 2018042536W WO 2019107192 A1 WO2019107192 A1 WO 2019107192A1
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WO
WIPO (PCT)
Prior art keywords
skin
sheet
absorbent article
facing
fiber
Prior art date
Application number
PCT/JP2018/042536
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English (en)
Japanese (ja)
Inventor
友美 古川
耕平 桑畑
Original Assignee
花王株式会社
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 花王株式会社 filed Critical 花王株式会社
Priority to CN201880069774.6A priority Critical patent/CN111315335B/zh
Priority to RU2020118979A priority patent/RU2748689C1/ru
Publication of WO2019107192A1 publication Critical patent/WO2019107192A1/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
    • 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
    • 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
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/512—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its apertures, e.g. perforations

Definitions

  • the present invention relates to an absorbent article such as a disposable diaper.
  • Soft stool is an excrement often found particularly in low-aged children, and its viscosity is different and heterogeneous compared to normal stool. Therefore, if the soft feces absorption capability of the diaper is insufficient, the time for which the wearer's skin comes into contact with the soft feces will be long, and the skin may be stimulated to cause skin troubles such as skin inflammation.
  • Patent Document 1 discloses an absorbent article having a sublayer between a top sheet having a large number of openings and an absorbent core. Have been described. Moreover, the absorbent article which distribute
  • JP 2011-235115 A JP, 2008-100106, A JP, 2011-200443, A
  • the present invention is an absorbent article comprising a liquid-retaining absorbent core, and a skin-facing fiber structure disposed on the skin-facing surface side of the absorbent core.
  • the absorbent article is planarly viewed from the skin-facing surface side, and the skin-facing fibrous structure has a plurality of low density areas with relatively low fiber density and a high density area with relatively high fiber density. And each low density region is surrounded by the high density region.
  • FIG. 1 is a plan view schematically showing the skin-facing surface, that is, the front sheet side, of a disposable diaper according to an embodiment of the absorbent article of the present invention. It is a top view in a state.
  • FIG. 2 is a cross-sectional view schematically showing a cross section taken along line II-II of FIG.
  • FIG. 3 is a partially enlarged plan view showing the low density area and the high density area of the disposable diaper of the present embodiment.
  • FIG. 4 is a partially enlarged cross-sectional view in which a part of a cross-sectional view of the disposable diaper of the present embodiment is enlarged.
  • FIG. 5 is the partial expanded sectional view which expanded a part of cross-sectional view of the disposable diaper of other embodiment of this invention (FIG. 4 equivalent view).
  • Patent Document 1 does not describe anything about the fiber density of the top sheet and the fiber density of the sublayer, and nothing about the relationship between the fiber density of the top sheet and the fiber density of the sublayer.
  • Patent Document 2 and Patent Document 3 describe using an intermediate sheet having a fiber density higher than the fiber density of the surface sheet in the absorbent article.
  • an intermediate sheet having a high fiber density is lower in fiber density than the intermediate sheet and adjacent to the back surface side of the top sheet having liquid permeation holes, the fiber density of the surface sheet other than the liquid permeation holes.
  • the present invention relates to an absorbent article which absorbs inhomogeneous soft stools of different viscosities efficiently and the soft stools are less likely to adhere to the skin of the wearer.
  • the disposable diaper 1 which is one Embodiment of the absorbent article of this invention is shown by FIG.1 and FIG.2.
  • the diaper 1 has a ventral side 1F disposed on the ventral side of the wearer when worn, a dorsal side 1R disposed on the dorsal side, and a crotch 1M located therebetween, and crotch from the ventral side 1F It has a longitudinal direction X which extends to the back side 1R via the portion 1M and which corresponds to the longitudinal direction of the wearer, and a transverse direction Y which is orthogonal to this.
  • the front-rear direction of the wearer is a direction extending from the ventral side 1F to the dorsal side 1R via the crotch 1M.
  • the crotch portion 1M is in the range of 25 to 60%, preferably 30 to 50% of the total length of the diaper 1 around the bisector CL when the diaper 1 is equally divided in the longitudinal direction X into two.
  • the crotch portion 1M has an excretion portion facing portion which is disposed to face both the urine excretion portion and the feces excretion portion (anus) of the wearer when the diaper 1 is worn, and the excretion portion facing portion is usually a diaper It is located at or near the central portion in the longitudinal direction X of 1.
  • the diaper 1 comprises a liquid-retaining absorbent core 40, a skin-facing fibrous structure 10 disposed on the skin-facing surface side of the absorbent core 40, and an absorbent core 40, as shown in FIGS. It is equipped with a liquid impermeable or liquid impermeable back sheet 3 disposed on the non-skin facing surface side.
  • the skin-facing fibrous structure 10 is disposed on the skin-facing surface side, and is a liquid-permeable surface sheet 2 that can contact the wearer's skin when worn, and a fluid disposed adjacent to the non-skin-facing surface of the surface sheet 2
  • a permeable intermediate sheet 5 is provided.
  • the skin-facing fiber structure 10 is formed by laminating the surface sheet 2 and the intermediate sheet 5.
  • the absorbent core 40 is covered with the core wrap sheet 41 and constitutes the absorbent body 4.
  • the diaper 1 has an elongated hourglass shape in which a substantially central portion in the longitudinal direction X located in the crotch 1M narrows inward and extends in one direction, that is, the longitudinal direction X in plan view as shown in FIG.
  • the "skin-facing surface” is a surface of the absorbent article or a component thereof (for example, the surface sheet 2) that faces the skin of the wearer when the absorbent article is worn, ie, relatively worn. It is the side close to the skin of the person, and the "non-skin facing side” is the side of the absorbent article or its component that is directed to the side (dressing side) opposite to the skin side when wearing the absorbent article, Far from the wearer's skin.
  • “at the time of wearing” means the state where the usual proper wearing position, ie, the correct wearing position of the absorptive article, was maintained, and when the absorptive article has shifted from the wearing position. Not included.
  • the top sheet 2 and the back sheet 3 each have a size larger than that of the absorber 4 and extend outward from the outer edge of the absorber 4.
  • the surface sheet 2 will be described in detail later.
  • the back sheet 3 forms the outline of the diaper 1 in the unfolded and stretched state as shown in FIG.
  • various materials conventionally used for this type of absorbent article can be used without particular limitation.
  • the back sheet 3 includes, for example, a form of a liquid-impermeable film sheet alone and a form in which an exterior sheet is laminated on the non-skin facing surface of the film sheet, that is, the outer surface side. It is a non-woven fabric.
  • the absorber 4 has a long shape in the longitudinal direction X in plan view as shown in FIG. 1 and extends from the ventral side 1F to the dorsal side 1R.
  • the absorbent core 40 and the core wrap sheet 41 are joined by a known joining means such as a hot melt adhesive.
  • the absorbent core 40 has a single-layer structure, and in a plan view as shown in FIG. 1, has an hourglass shape in which a substantially central portion in the longitudinal direction, that is, the longitudinal direction X is inwardly narrowed.
  • the absorbent core 40 is formed by stacking a core-forming material containing an absorbent material.
  • materials generally used as a material for forming this type of absorbent core can be used without particular limitation, and examples thereof include hydrophilic fibers such as wood pulp, synthetic fibers treated with a hydrophilizing agent, and water absorption. Polymer particles. That is, the absorbent core 40 may be a piled body of hydrophilic fibers, or one obtained by supporting the piled water absorbent polymer particles on the piled body.
  • a water-permeable sheet material can be used as the core wrap sheet 41, and for example, paper, non-woven fabric, etc. can be used.
  • the intermediate sheet 5 is a sheet separate from the absorbent body 4 and interposed between the top sheet 2 and the absorbent body 4 and is also called a sublayer or a second sheet.
  • the intermediate sheet 5 has a rectangular shape in plan view as shown in FIG.
  • the intermediate sheet 5 covers 30 to 70% of the skin-facing surface of the absorbent body 4 with the longitudinal direction aligned with the longitudinal direction X, and further covers 40 to 60%. preferable.
  • the intermediate sheet 5 is disposed in the crotch 1M.
  • the length (width) of the intermediate sheet 5 in the transverse direction Y is equal to or shorter than that of the absorbent body 4.
  • the crotch portion 1M includes the discharge portion facing portion, and the intermediate sheet 5 is disposed at the discharge portion facing portion.
  • the intermediate sheet 5 and each of the surface sheet 2 and the absorbent body 4 (core wrap sheet 41) are entirely or partially bonded by a known bonding means such as an adhesive.
  • the intermediate sheet 5 will be described in detail later.
  • Side sheets 6 are disposed on the left and right sides of the front sheet 2 along the longitudinal direction X, respectively.
  • the side sheet 6 has an inner edge along the longitudinal direction X and an outer edge along the longitudinal direction X located on the outer side of the lateral direction Y than the inner edge, as shown in FIG. In view, the inner edge overlaps the absorber 4, and the outer edge extends outward in the lateral direction Y from the side edge along the longitudinal direction X of the absorber 4, as shown in FIG. It is joined with 3.
  • a thread-like elastic member 60 is fixed in a stretched state along the longitudinal direction X between the side sheets 6 and the back sheet 3 in the left and right leg portions disposed around the legs of the wearer, whereby the diaper A pair of leg gathers are formed on the leg portion when 1 is worn by the contraction of the elastic member 60.
  • a thread-like elastic member 61 is fixed to the inner edge of the side sheet 6 in a stretched state along the longitudinal direction X, whereby at least the crotch 1M is contracted by the contraction of the elastic member 61 when the diaper 1 is worn.
  • the inner edge side of the side sheet 6 is erected toward the wearer's skin side from the junction with the back sheet 3 to form a leak-barrier cuff.
  • This leak-barrier cuff can prevent so-called lateral leak of the drainage fluid such as urine to the outside in the lateral direction Y.
  • the top sheet 2, the back sheet 3, the absorber 4, the intermediate sheet 5, the side sheets 6, and the elastic members 60 and 61 are bonded to each other by a known bonding means such as a hot melt adhesive.
  • the diaper 1 is a so-called spreadable disposable diaper, and as shown in FIG. 1, a pair of fastening tapes 7 and 7 are provided on both side edges along the longitudinal direction X of the back side 1R of the diaper 1 .
  • a fastening portion (not shown) made of a male member of a mechanical surface fastener is attached to the fastening tape 7.
  • an attachment area 8 made of a female member of a mechanical surface fastener is formed on the non-skin facing surface of the ventral side portion 1F of the diaper.
  • the attachment region 8 is a non-skin facing surface of the back sheet 3 forming the non-skin facing surface of the flank 1F, with a female member of a mechanical surface fastener by a known bonding means such as an adhesive or heat seal. It is formed by joining and fixing, and the fastening portion of the fastening tape 7 can be detachably fastened.
  • FIG. 3 is a partially enlarged plan view showing the low density region LR and the high density region HR of the diaper 1 when the diaper 1 is viewed in plan from the top sheet 2 side.
  • FIG. 4 shows a partially enlarged cross-sectional view in which a part of the cross-sectional view of the diaper 1 is enlarged.
  • the top sheet 2 has a plurality of openings 2 h penetrating the top sheet 2 as shown in FIGS. 1 and 2.
  • the openings 2 h may be provided in the entire area of the surface sheet 2, but in the diaper 1, the openings 2 h are provided in the crotch 1 M of the surface sheet 2.
  • the plurality of openings 2 h are provided in the surface sheet 2, in the diaper 1, as shown in FIGS. 3 and 4, the skin facing surface of the intermediate sheet 5 is exposed from each opening 2 h It has become.
  • the crotch portion 1M has the excretory part opposing part, and the excretory part opposing part is the fecal excretory part opposing part 2R disposed opposite to the fecal excretory part of the wearer. It has on the back side 1R side.
  • the plurality of apertures 2h of the top sheet 2 be provided only in the feces excretory part facing part 2R.
  • excrement such as soft stool can be efficiently collected from the opening 2h, for example, and the collected excrement other than the feces excrement part facing part 2R It is possible to suppress liquid return from the site.
  • the openings 2 h may be dispersed in the surface direction of the surface sheet 2 as shown in FIG. 1, but in the diaper 1, the plurality of the openings 2 h are uniformly distributed in the in-plane direction of the surface sheet 2 doing. Specifically, a row of apertures in which a plurality of apertures 2 h are arranged in series along the horizontal direction Y at regular intervals is arranged at regular intervals in the longitudinal direction X. And, in the diaper 1, between the openings 2h and 2h adjacent to each other in the lateral direction Y constituting one opening row, the opening 2h forming another opening row adjacent to the one opening row Are arranged in a staggered arrangement.
  • the shape of the openings 2h is not particularly limited, but from the viewpoint of preventing the flow of excremented loose feces and the like in the lateral direction Y and preventing leakage, the surface sheet 2 is viewed in plan view from the top
  • X is formed in a long shape.
  • the openings 2h are formed in a rectangular shape long in the longitudinal direction X.
  • the area ratio of the openings 2h is preferably 5% or more, more preferably 10% or more, and 20% or less, from the viewpoint of improving the absorption performance of excrement such as soft stools. 18% or less is more preferable, and specifically, 5% or more and 20% or less is preferable, and 10% or more and 18% or less is more preferable.
  • the area ratio of the openings 2h is measured by the following method.
  • 5 mm 2 or more is preferable, and 7 mm 2 or more is more preferable, and 20 mm as an area (surface area) per hole 2 h formed in the crotch 1 M in plan view of the surface sheet 2.
  • 2 or less is preferable, 15 mm 2 or less is more preferable, 5 mm 2 or more and 20 mm 2 or less is preferable, and 7 mm 2 or more and 15 mm 2 or less is more preferable.
  • 20 g / m 2 or more is preferable, 25 g / m 2 or more is more preferable, 36 g / m 2 or less is preferable, 32 g / m 2 or less is more preferable, and 20 g / m 2 or more is 36 g / m 2 preferably 2 or less, 25 g / m 2 or more 32 g / m 2 or less is more preferable.
  • the basis weight of the surface sheet 2 is a value measured in a state where the openings 2 h are removed.
  • the fiber density (book / mm 2 ) of the fibers forming the topsheet 2 is higher than the fiber density of the fibers forming the intermediate sheet 5.
  • the fiber density of the surface sheet 2 from the viewpoint of absorbing a low viscosity feces efficiently, preferably 100 / mm 2 or more, more preferably 150 present / mm 2 or more, 300 lines / mm 2 or less, more preferably 250 lines / mm 2 or less, preferably 100 / mm 2 or more 300 lines / mm 2 or less, more preferably 150 present / mm 2 or more 250 lines / mm 2 or less.
  • the fiber density of the fibers of the top sheet 2 is measured by the following measurement method.
  • the fiber density of the top sheet 2 is a value measured without the openings 2 h.
  • the cut surface of the surface sheet 2 is adjusted to a magnification (150 to 500 times that can measure about 30 to 60 fiber cross sections) using a scanning electron microscope and then adjusted per fixed area (about 0.5 mm 2) the number of cross sections of the fibers that are cut by the cutting surface of) were measured to determine the area of the field portion of the measurement of the number of fiber cross section. then, in terms of the number of cross sections of fibers per 1 mm 2, the fiber density this (Book / mm 2 ) Measurement is performed at three points and the average is the fiber density of the sample For example, JCM-5100 (trade name) manufactured by JEOL Ltd. is used for the scanning electron microscope It can be used.
  • an outer edge portion 2 h 1 having a higher fiber density than that of the portion of the top sheet 2 excluding the openings 2 h is formed at the outer edge of the opening 2 h of the top sheet 2.
  • the fiber density (book / mm 2 ) of the fibers forming the outer edge portion 2 h 1 is preferably 300 fibers / mm 2 or more, 350 fibers / mm 2 from the viewpoint of more efficiently absorbing the soft stool excreted in the surface sheet 2.
  • the above is more preferable, 500 lines / mm 2 or less is preferable, 450 lines / mm 2 or less is more preferable, 300 lines / mm 2 or more and 500 lines / mm 2 or less are preferable, 350 lines / mm 2 or more and 450 lines / mm 2 The following are more preferable.
  • the fiber density of the fibers of the outer edge portion 2h1 is measured by the same method as the above-described fiber density measurement method.
  • the entire intermediate sheet 5 is made of a non-woven fabric formed of synthetic fibers.
  • Total basis weight of the intermediate sheet 5 is preferably 15 g / m 2 or more, 25 g / m 2 or more, and preferably from 50g / m 2 or less, more preferably 40g / m 2, 15g / m 2 or more 50g / M 2 or less is preferable, and 25 g / m 2 or more and 40 g / m 2 or less are more preferable.
  • the fiber density of the fibers forming the intermediate sheet 5 is lower than the fiber density of the fibers forming the top sheet 2.
  • the intermediate sheet 5 is adjacent to the non-skin facing surface of the high density layer 51 having a relatively high fiber density and the high density layer 51 and has a relatively low fiber density. It has a two-layer structure having a density layer 52.
  • the low density layer 52 is located on the surface sheet 2 side (skin facing surface side), and the high density layer 51 is located on the absorber 4 side (non-skin facing surface side).
  • the fiber density of the fibers on the surface sheet 2 side is relatively low, and the fiber density of the fibers on the non-skin facing surface side is relatively high.
  • the fiber density of the fibers forming the intermediate sheet 5 is measured by the same method as the method of measuring the fiber density described above.
  • the fiber density (book / mm 2 ) of the fibers forming the high density layer 51 is lower than the fiber density of the fibers forming the topsheet 2.
  • the fiber density of the fibers forming the dense layer 51 from the same viewpoint, preferably 20 present / mm 2 or more, more preferably 25 present / mm 2 or more, preferably 50 present / mm 2 or less, 30 lines / mm 2 or less is more preferable, 20 lines / mm 2 or more and 50 lines / mm 2 or less are preferable, and 25 lines / mm 2 or more and 30 lines / mm 2 or less are more preferable.
  • the fiber density (book / mm 2 ) of the fibers forming the low density layer 52 is lower than the fiber density of each of the fibers forming the high density layer 51 and the surface sheet 2.
  • the fiber density of the fibers forming the low-density layer 52 from the same viewpoint, preferably three / mm 2 or more, more preferably five / mm 2 or more, preferably 45 present / mm 2 or less, 10 lines / mm 2 or less is more preferable, 3 lines / mm 2 or more and 45 lines / mm 2 or less are preferable, and 5 lines / mm 2 or more and 10 lines / mm 2 or less are more preferable.
  • the low density region LR and the high density region HR are formed by the surface sheet 2 having the openings 2h having the physical properties as described above and the intermediate sheet 5 lower than the fiber density of the fibers forming the surface sheet 2 It is done. Specifically, when the diaper 1 is planarly viewed from the surface sheet 2 side, the low density region LR is an area from the opening 2 h of the surface sheet 2 in the portion where the surface sheet 2 and the intermediate sheet 5 overlap in the thickness direction. The skin opposing surface of the sheet 5 is exposed and formed.
  • the high density region HR is formed by the portion of the top sheet 2 excluding the openings 2 h in the portion where the top sheet 2 and the intermediate sheet 5 overlap in the thickness direction.
  • the boundary H1 between the low density region LR and the high density region HR is formed by the outer edge portion 2h1 of the opening 2h in the surface sheet 2 at the portion where the surface sheet 2 and the intermediate sheet 5 overlap in the thickness direction. And is formed to be higher than the fiber density of the high density region HR.
  • the skin-facing fiber structure 10 has a plurality of low density regions LR and a high density region HR, as viewed from above the skin-facing surface, and each low density region LR It is surrounded by a high density area HR. Therefore, even when the excrement excreted by the wearer is heterogeneous soft stool, the low-density region HR holds and absorbs the low-viscosity stool, and the high-density stool is retained and absorbed in the low-density region LR. It can be efficiently absorbed in response to heterogeneous viscosities of different viscosities.
  • the entire periphery of the low density region LR is not surrounded by the high density region HR, and 50% or more of the entire periphery of the low density region LR is high It is a meaning also including the state surrounded by the density region HR.
  • the shape of the low density region LR is the same as the shape of the opening 2 h of the surface sheet 2 described above because the low density region LR is formed by exposing the intermediate sheet 5 from the opening 2 h of the surface sheet 2.
  • the area per low density region LR is formed by exposing the intermediate sheet 5 from the opening 2 h of the surface sheet 2 in the low density region LR
  • the area of the opening 2 h of the surface sheet 2 described above is is the same as the area per, from the viewpoint of improving the absorption performance of excrement loose stool, etc., preferably 5 mm 2 or more, more preferably 7 mm 2 or more, preferably 20 mm 2 or less, 18 mm 2 or less, more preferably, preferably 5 mm 2 or more 20 mm 2 or less, more preferably 7 mm 2 or more 18 mm 2 or less.
  • the low density region LR (opening 2h) relative to the surface area of the skin-facing fiber structure 10 (area of the portion where the surface sheet 2 and the intermediate sheet 5 are laminated) formed by laminating the surface sheet 2 and the intermediate sheet 5
  • the percentage of the total area is preferably 5% or more, more preferably 10% or more, and preferably 20% or less, more preferably 18% or less, from the viewpoint of improving the absorption performance of feces such as soft stools. In particular, 5% or more and 20% or less are preferable, and 10% or more and 18% or less are more preferable.
  • the ratio of the total area of the low density region LR to the surface area of the skin-facing fiber structure 10 is measured by the following method.
  • the low density region LR when the low density region LR is provided in the feces excretory part facing part 2R, the soft feces, urine and the like collected from the high density area HR are liquid from a site other than the feces excretory part facing part 2R. It is possible to suppress returning. Further, when the low density regions LR are arranged in a staggered arrangement, stool with high viscosity can be efficiently held and absorbed.
  • the fiber density at the boundary H1 with the high density area HR surrounding the low density area LR is higher than the fiber density of the high density area HR. Therefore, low viscosity stool easily flows by capillary action from the low density region LR or from the high density region HR to the high fiber density boundary portion H1, and the absorption performance of excrement such as soft stool is improved.
  • the low-density region LR, the high-density region HR, and the boundary H1 relate to the contact angle of the fibers constituting the skin-facing surface with ion exchange water, such as stools with low viscosity to the absorbent 4 side.
  • the contact angle of the high density region HR which is a portion excluding the openings 2 h in the surface sheet 2, is the same as that in the surface sheet 2 from the viewpoint of improving the retraction and reducing the liquid residue of the excrement on the skin facing surface of the diaper 1.
  • the contact angle is lower than the contact angle of the boundary portion H1 which is the outer edge portion 2h1 of the aperture 2h.
  • the contact angle of the low density region LR formed by exposing the intermediate sheet 5 from the opening 2 h of the surface sheet 2 is higher than the contact angle of the high density region HR which is a portion excluding the opening 2 h in the surface sheet 2.
  • the contact angle of the boundary portion H1 in other words, the contact angle of the fibers constituting the skin facing surface side of the outer edge portion 2h1 of the opening 2h in the top sheet 2 is preferably 75 degrees or more, 80 degrees or more More preferably, 95 degrees or less is preferable, 90 degrees or less is more preferable, 75 degrees or more and 95 degrees or less are preferable, and 80 degrees or more and 90 degrees or less are more preferable.
  • the contact angle of the high density region HR in other words, the contact angle of the fibers constituting the skin facing surface of the portion of the topsheet 2 excluding the openings 2h is preferably 65 degrees or more, more preferably 70 degrees or more, 90 degrees or less is preferable, 80 degrees or less is more preferable, 65 degrees or more and 90 degrees or less are preferable, and 70 degrees or more and 80 degrees or less are more preferable.
  • the contact angle of the low density region LR in other words, the contact angle of the fibers constituting the skin facing surface side of the intermediate sheet 5 at least in the portion exposed from the opening 2h, is preferably 60 degrees or more, more preferably 65 degrees or more 85 degrees or less is preferable, 75 degrees or less is more preferable, 60 degrees or more and 85 degrees or less are preferable, and 65 degrees or more and 75 degrees or less are more preferable.
  • the contact angle of the boundary portion H1, the contact angle of the high density region HR, and the contact angle of the low density region LR are measured by the following measurement method.
  • the fiber is removed from the predetermined site, and the contact angle of water to the fiber is measured.
  • an automatic contact angle meter MCA-J manufactured by Kyowa Interface Science Co., Ltd. is used as a measuring device. Distilled water is used to measure the contact angle.
  • the amount of liquid discharged from an inkjet type water droplet discharge part (manufactured by Cluster Technology, pulse injector CTC-25 with a discharge hole diameter of 25 ⁇ m) is set to 20 picoliter, and a water droplet is dropped right above the fiber. The state of dropping is recorded on a high-speed recording device connected to a camera installed horizontally.
  • the recording device is preferably a personal computer in which a high-speed capture device is incorporated.
  • a high-speed capture device is incorporated.
  • an image is recorded every 17 msec.
  • the recorded video the first image in which water droplets have dropped on fibers taken out of the non-woven fabric, attached software FAMAS (the software version is 2.6.2, the analysis method is the droplet method, the analysis method is the ⁇ / 2 method)
  • the image processing algorithm is non-reflection, the image processing image mode is frame, the threshold level is 200, curvature correction is not performed, and image analysis is performed to calculate the angle between the surface of the water droplet and the fiber. And the contact angle.
  • non-woven fabric for example, non-woven fabric, air-through non-woven fabric, spun-bonded non-woven fabric, melt-blown non-woven fabric manufactured by the card method containing thermally fusible synthetic resin such as polyethylene, polyethylene terephthalate, polypropylene etc. It is possible to use various non-woven fabrics such as spunlace non-woven fabric and needle punched non-woven fabric; As the top sheet 2, it is preferable to use an air through non-woven fabric or a spun-bonded non-woven fabric, from the viewpoint of facilitating the passage of soft stool without damaging the texture of the skin facing surface.
  • the openings 2 h formed in the surface sheet 2 various methods for forming the openings conventionally used in this type of absorbent article can be used without particular limitation.
  • the openings 2 h may be heated By forming by cutting or pressing for cutting, an outer edge portion 2 h 1 having a relatively high fiber density is formed.
  • an air through non-woven fabric for example, an air through non-woven fabric, a heat roll non-woven fabric, a spun bond non-woven fabric, a spun bond (S-bond) containing a heat fusible synthetic resin such as polyethylene, polyethylene terephthalate or polypropylene.
  • Meltblown (M)-Spunbond (S) Nonwovens, SMMS Nonwovens, Resin Bonded Nonwovens, Needle Punched Nonwovens, Spunlace Nonwovens, Airlaid Nonwovens can be used. It is preferable to use an air through non-woven fabric as the intermediate sheet.
  • any non-woven fabric is in contact with the net at the time of manufacture (disposed on the net) and not in contact with the net surface, and high temperature air or high pressure It has a surface (air surface) opposite to the net surface, to which the water flow is directly applied.
  • the fiber density is higher in the net surface than in the air surface.
  • the temperature of the high-temperature air or the pressure of the high-pressure water stream, the moving speed of the web, and the like are adjusted so that the fiber density of the non-woven fabric obtained and the contact angle on the air surface side become desired values.
  • the two-layer intermediate sheet 5 having the high density layer 51 and the low density layer 52 can be manufactured.
  • the absorbent article of this invention was demonstrated based on the preferable embodiment, the absorbent article of this invention can be variously changed, without being restrict
  • the diaper 1 described above has a boundary portion H1 with a higher fiber density than the high density region HR at the boundary with the high density region HR surrounding the low density region LR.
  • the boundary portion H1 Heterogeneous soft stool can be efficiently absorbed also by the diaper 1 shown in FIG.
  • the skin-facing fiber structure 10 is configured by laminating two sheets of the top sheet 2 and the middle sheet 5.
  • the skin facing fiber structure 10 does not necessarily have to be composed of two sheets of the top sheet 2 and the intermediate sheet 5.
  • it may be composed of one sheet having the low density region LR and the high density region HR.
  • the skin-facing fiber structure 10 includes the surface sheet 2 and the intermediate sheet 5, and the skin-facing surface of the intermediate sheet 5 is exposed from the openings 2h of the surface sheet 2 to form the low density region LR.
  • the intermediate sheet 5 may not necessarily be provided.
  • the skin-facing fiber structure 10 does not include the intermediate sheet 5 and includes the surface sheet 2 and the core wrap sheet 41 covering the skin-facing surface of the absorbent core, and the skin-facing surface of the core wrap sheet 41 is the surface sheet
  • the low density region LR may be formed so as to be exposed from the openings 2 h of 2.
  • the core wrap sheet 41 it is necessary to use a non-woven fabric formed of synthetic fibers, and to use a non-woven fabric having a fiber density of constituent fibers lower than that of the fibers forming the top sheet 2.
  • the diaper 1 mentioned above uses the nonwoven fabric of 2 layer structure which has the high density layer 51 and the low density layer 52 as the intermediate sheet 5, it is not necessary to necessarily use the nonwoven fabric of 2 layer structure, for example, a surface sheet A single layer non-woven fabric having a fiber density lower than the fiber density of 2 may be used.
  • the absorbent article of the present invention is not limited to the above-mentioned unfolded disposable diaper, but includes a wide range of articles used for absorbing body fluid (urine, soft feces, menstrual blood, etc.) discharged from the human body. Also included are disposable diapers, sanitary napkins, sanitary pants and the like.
  • the present invention further discloses the following absorbent article.
  • An absorbent article comprising: a liquid-retaining absorbent core; and a skin-facing fiber structure disposed on the skin-facing surface side of the absorbent core, wherein the absorbent article is viewed in plan from the skin-facing surface side.
  • the skin-facing fiber structure has a plurality of low density regions with relatively low fiber density and a high density region with relatively high fiber density, each low density region having the high density.
  • An absorbent article surrounded by a density region.
  • the absorbent article in a plan view from the skin facing side, the area of each of said low-density region is 5 mm 2 or more 20 mm 2 or less, the absorbent article according to ⁇ 1>.
  • the absorbent article When the absorbent article is planarly viewed from the skin facing surface side, the ratio of the total area of the plurality of low density regions to the surface area of the skin facing fiber structure is 5% or more and 15% or less.
  • the absorbent article has a boundary portion at the boundary between each of the low density regions and the high density region surrounding each of the low density regions when the absorbent article is planarly viewed from the skin facing surface side, and the fiber density of the boundary portion is The absorbent article according to any one of ⁇ 1> to ⁇ 3>, which is higher than the fiber density of the high density region.
  • ⁇ 5> With regard to the contact angle of the fibers constituting the skin-facing surface with ion exchange water, the contact angle of the high density region is smaller than the contact angle of the boundary portion, and the contact angle of the low density region is greater than the contact angle of the high density region.
  • the absorbent article according to ⁇ 4> which is also small.
  • the ⁇ 1> to ⁇ 5> has a longitudinal direction corresponding to the longitudinal direction of the wearer and a lateral direction orthogonal to the longitudinal direction, and each of the low density regions is formed in a shape elongated in the longitudinal direction.
  • ⁇ 7> The absorbent article according to any one of ⁇ 1> to ⁇ 6>, wherein the plurality of low density regions are provided on a feces excrement part opposing part disposed opposite to a feces excrement part of a wearer.
  • the skin-facing fibrous structure comprises a surface sheet disposed on the skin-facing surface side, and a liquid-permeable intermediate sheet disposed adjacent to the non-skin-facing surface of the surface sheet, the surface sheet comprising:
  • the high density region is formed by a portion excluding the holes in the surface sheet, and the low density region is a surface facing the skin of the intermediate sheet.
  • ⁇ 9> The absorbent article according to ⁇ 8>, wherein the fiber density of the fibers on the skin facing surface side of the intermediate sheet is lower than the fiber density of the fibers on the non-skin facing surface side.
  • the skin-facing fiber structure comprises a surface sheet disposed on the skin-facing surface, and a core wrap sheet disposed between the surface sheet and the absorbent core to cover the skin-facing surface of the absorbent core.
  • the surface sheet has holes distributed in the surface direction, the high density region is formed by a portion excluding the holes in the surface sheet, and the low density region is the core.
  • the absorbent article according to any one of the above ⁇ 8> to ⁇ 10>, wherein ⁇ 12>
  • the area ratio of the openings is preferably 5% or more, more preferably 10% or more, and preferably 20% or less, and more preferably 18% or less.
  • ⁇ 13> It has a ventral side disposed on the ventral side of the wearer when worn, a dorsal side disposed on the dorsal side, and a crotch positioned between them, and the top sheet is seen in plan view, the crotch the area per of the apertures formed (surface area), preferably 5 mm 2 or more, more preferably 7 mm 2 or more, preferably 20 mm 2 or less, more preferably 15 mm 2 or less, wherein ⁇ 8> ⁇ ⁇
  • ⁇ 14> 20 g / m 2 or more is preferable, 25 g / m 2 or more is more preferable, 36 g / m 2 or less is preferable, and 32 g / m 2 or less is more preferable Preferred is the absorbent article according to any one of the above ⁇ 8> to ⁇ 13>.
  • the fiber density of the topsheet is preferably 100 / mm 2 or more, more preferably 150 present / mm 2 or more, preferably 300 lines / mm 2 or less, more preferably 250 lines / mm 2 or less, wherein ⁇ 8> The absorbent article according to any one of ⁇ 14>.
  • the outer edge portion of the opening of the surface sheet is formed with an outer edge portion having a higher fiber density than the portion of the surface sheet excluding the opening, and the fiber density of the fibers forming the outer edge portion (book / mm 2 ) is preferably 300 lines / mm 2 or more, more preferably 350 lines / mm 2 or more, preferably 500 lines / mm 2 or less, more preferably 450 lines / mm 2 or less, the above ⁇ 8> to ⁇ 15>
  • the absorbent article according to any one of the above.
  • the intermediate sheet is composed of a non-woven fabric formed of synthetic fibers, and the total basis weight of the intermediate sheet is preferably 15 g / m 2 or more, more preferably 25 g / m 2 or more, and 50 g / m 2 or less.
  • the intermediate sheet has a two-layer structure having a high density layer having a relatively high fiber density, and a low density layer adjacent to the non-skin facing surface of the high density layer and having a relatively low fiber density.
  • the difference between the fiber density of the fibers forming the low density layer of the intermediate sheet (book / mm 2 ) and the fiber density of the fibers forming the high density layer (book / mm 2 ) is 5 / mm
  • the number is preferably 2 or more, more preferably 10 / mm 2 or more, preferably 20 / mm 2 or less, and more preferably 15 / mm 2 or less, said ⁇ 8>
  • the fiber density of the fibers forming the high density layer (book / mm 2 ) is lower than the fiber density of the fibers forming the surface sheet, and the fiber density of the fibers forming the high density layer is 20 this / mm 2 or more, more preferably 25 present / mm 2 or more, preferably 35 present / mm 2 or less, more preferably 30 lines / mm 2 or less, the absorbent article according to ⁇ 18>.
  • the fiber density (book / mm 2 ) of the fibers forming the low density layer is lower than the fiber density of each of the fibers forming the high density layer and the surface sheet, and the fibers forming the low density layer fiber density is of, three / mm 2 or more, more preferably five / mm 2 or more, preferably 15 present / mm 2 or less, more preferably ten / mm 2 or less, the ⁇ 18> or ⁇ 19
  • the area per one low density region is the same as the area of each one of said apertures of the topsheet is preferably 5 mm 2 or more, more preferably 7 mm 2 or more, preferably 20 mm 2 or less, 18 mm
  • the surface area of the skin-facing fiber structure (the area of the portion where the surface sheet and the intermediate sheet are laminated) formed by laminating the surface sheet and the intermediate sheet 5% or more is preferable, 10% or more is more preferable, and 20% or less is preferable, and the ratio of a total area is an absorbent article as described in said ⁇ 21> as 18% or less is more preferable.
  • the contact angle of the fibers constituting the skin facing surface side of the outer edge portion of the hole in the surface sheet which is the boundary portion between the low density region and the high density region is preferably 82 degrees or more, and 83 degrees or more
  • ⁇ 24> 78 degrees or more are preferable, 79 degrees or more are more preferable, and the contact angle of the fiber which comprises the skin opposing surface side of the part except the said opening in the said surface sheet which is the contact angle of the said high density area
  • region is 82 degrees or less
  • ⁇ 26> It has a ventral side disposed on the ventral side of the wearer when worn, a dorsal side disposed on the dorsal side, and a crotch portion located therebetween, the crotch portion being a part of the wearer's urine when worn And the excretory part opposing part disposed opposite to both feces excretory parts, the excretory part opposing part being the feces excretory part opposing part disposed opposite to the fecal excretory part of the wearer.
  • the absorbent article according to any one of ⁇ 8> to ⁇ 25>, wherein the plurality of apertures of the top sheet are preferably provided only in the feces excretory part opposing part.
  • the intermediate sheet has a longitudinal direction corresponding to the front-rear direction of the wearer and a transverse direction orthogonal thereto, and the intermediate sheet has the longitudinal direction aligned with the longitudinal direction, and the absorbent core is covered with the core wrap sheet.
  • Example 1 The diaper which has the structure similar to the diaper 1 shown in FIG.1 and FIG.2 provided with the skin opposing fiber structure 10 which has the surface sheet 2 shown in FIG.3 and FIG.4 and the intermediate sheet 5 was manufactured.
  • a spun bond nonwoven fabric having a basis weight of 26 g / m 2 containing a polypropylene resin was used.
  • the intermediate sheet a web containing polyethylene resin loaded on air flow is dropped and deposited on the net, and the web on the net moving at a speed of 80 m / s is opposite to the net side.
  • An air through nonwoven fabric with a basis weight of 35 g / m 2 was used, which was produced by penetrating air at 135 ° C.
  • Example 2 Change the physical properties etc. using the spun bond nonwoven fabric which has the boundary part H1 whose contact angle to the fiber density and ion exchange water is higher than the high density area HR at the boundary between the low density area LR and the high density area HR as the surface sheet
  • a diaper with the same configuration as in Example 1 was produced except that the top sheet and the intermediate sheet were used.
  • the physical properties and the like of the surface sheet and the intermediate sheet are shown in Table 1 below.
  • Example 3 A surface sheet in which the spun bond non-woven fabric used in Example 2 is used as a surface sheet, and further, an intermediate sheet in which the fiber density on the skin opposing surface side is lower than the fiber density on the non-skin opposing surface side is used.
  • a diaper of the same configuration as Example 1 was manufactured except that an intermediate sheet was used.
  • As an intermediate sheet a web is formed by dropping and depositing fibers containing polyethylene resin loaded on a stream onto a net, and the web on the net moving at a speed of 100 m / s is from the opposite side to the net surface side Using the air through non-woven fabric manufactured by penetrating air at 135 ° C. at a wind speed of 1 m / s, the surface on the net side of the manufactured air through non-woven fabric was used on the skin opposing surface side.
  • Table 1 The physical properties and the like of the surface sheet and the intermediate sheet are shown in Table 1 below.
  • Comparative Example 1 A diaper of the same configuration as Example 1 was produced except that the top sheet and the middle sheet were used with the same fiber density.
  • the physical properties and the like of the surface sheet and the intermediate sheet are shown in Table 1 below.
  • the pseudo-soft stool used is a suspension prepared by dissolving or dispersing bentonite in water, and adjusting the bentonite concentration to set the viscosity of the pseudo soft stool with high viscosity to 40 mPa ⁇ s, and the pseudo-soft stool with low viscosity.
  • the viscosity was 240 mPa ⁇ s.
  • the disposable diapers of Examples 1 to 3 are compared Compared with the disposable diaper of Example 1, it turned out that the amount of loose stools WB is low. From this, compared with the disposable diaper of Comparative Example 1, the disposable diapers of Examples 1 to 3 can efficiently absorb inhomogeneous soft stools having different viscosities, and can reduce the occurrence of skin troubles of the wearer. Can be expected.
  • non-uniform soft stools having different viscosities are efficiently absorbed to make it difficult for the soft stools to adhere to the skin of the wearer.

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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 est une couche jetable (1) pourvue : d'un noyau absorbant de rétention de liquide (40); et d'une structure de fibre faisant face à la peau (10) disposée sur le côté de surface faisant face à la peau du noyau absorbant (40). Lorsque la couche jetable (1) est vue dans une vue en plan à partir du côté de surface faisant face à la peau, la structure de fibre faisant face à la peau (10) comprend : une pluralité de régions de faible densité (LR) ayant une densité de fibres relativement faible; et une région de haute densité (HR) ayant une densité de fibres relativement élevée, et chacune des régions de faible densité (LR) étant entourée par la région de haute densité (HR). La structure de fibre faisant face à la peau (10) est pourvue d'une feuille de surface (2) disposée sur le côté de surface faisant face à la peau.
PCT/JP2018/042536 2017-11-29 2018-11-16 Article absorbant WO2019107192A1 (fr)

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Citations (6)

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JPS62170565A (ja) * 1986-01-20 1987-07-27 ユニ・チヤ−ム株式会社 吸収性物品の表面材およびその製法
JPH1014979A (ja) * 1996-06-28 1998-01-20 Uni Charm Corp 使い捨ての体液吸収性物品
JPH1080445A (ja) * 1996-09-09 1998-03-31 Kao Corp 吸収性物品の表面シート
JP2001276121A (ja) * 2000-03-31 2001-10-09 Uni Charm Corp 体液吸収性着用物品
JP2003116909A (ja) * 2001-10-12 2003-04-22 Kao Corp 吸収性物品
JP2005319042A (ja) * 2004-05-07 2005-11-17 Kao Corp 吸収性物品の表面シート

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JP3058572B2 (ja) * 1994-12-13 2000-07-04 ユニ・チャーム株式会社 体液吸収性物品
JPH108445A (ja) * 1996-06-25 1998-01-13 Kawasaki Steel Corp 管路の布設方法
JP5021398B2 (ja) * 2007-08-29 2012-09-05 王子ネピア株式会社 吸収性物品
JP5498474B2 (ja) * 2011-12-14 2014-05-21 花王株式会社 積層不織布の製造方法

Patent Citations (6)

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Publication number Priority date Publication date Assignee Title
JPS62170565A (ja) * 1986-01-20 1987-07-27 ユニ・チヤ−ム株式会社 吸収性物品の表面材およびその製法
JPH1014979A (ja) * 1996-06-28 1998-01-20 Uni Charm Corp 使い捨ての体液吸収性物品
JPH1080445A (ja) * 1996-09-09 1998-03-31 Kao Corp 吸収性物品の表面シート
JP2001276121A (ja) * 2000-03-31 2001-10-09 Uni Charm Corp 体液吸収性着用物品
JP2003116909A (ja) * 2001-10-12 2003-04-22 Kao Corp 吸収性物品
JP2005319042A (ja) * 2004-05-07 2005-11-17 Kao Corp 吸収性物品の表面シート

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RU2748689C1 (ru) 2021-05-28
CN111315335A (zh) 2020-06-19

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