WO2017163492A1 - 吸収性物品 - Google Patents

吸収性物品 Download PDF

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Publication number
WO2017163492A1
WO2017163492A1 PCT/JP2016/085808 JP2016085808W WO2017163492A1 WO 2017163492 A1 WO2017163492 A1 WO 2017163492A1 JP 2016085808 W JP2016085808 W JP 2016085808W WO 2017163492 A1 WO2017163492 A1 WO 2017163492A1
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WO
WIPO (PCT)
Prior art keywords
absorbent article
absorbent
layer
sheet
low
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2016/085808
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
順一 野口
明乃 大槻
久実 藤川
野田　祐樹
良太 河守
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unicharm Corp
Original Assignee
Unicharm Corp
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 Unicharm Corp filed Critical Unicharm Corp
Priority to CN201680083699.XA priority Critical patent/CN108883012B/zh
Priority to KR1020187025450A priority patent/KR102433718B1/ko
Priority to MYPI2018703219A priority patent/MY184943A/en
Publication of WO2017163492A1 publication Critical patent/WO2017163492A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • A61F13/45—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 shape
    • A61F13/47—Sanitary towels, incontinence pads or napkins
    • 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 of the pads
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/51104—Topsheet, i.e. the permeable cover or layer facing the skin the top sheet having a three-dimensional cross-section, e.g. corrugations, embossments, recesses or projections
    • 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
    • A61F13/45—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 shape
    • A61F13/47—Sanitary towels, incontinence pads or napkins
    • A61F13/472—Sanitary towels, incontinence pads or napkins specially adapted for female use
    • 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 of the pads
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • 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 of the pads
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/513—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its function or properties, e.g. stretchability, breathability, rewet, visual effect; having areas of different permeability
    • 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
    • A61F13/53—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 absorbing medium
    • A61F13/534—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 absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F13/537—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 absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
    • A61F13/5376—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 absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer characterised by the performance of the layer, e.g. acquisition rate, distribution time, transfer time

Definitions

  • the present invention relates to absorbent articles such as panty liners, light incontinence pads, sanitary napkins and the like.
  • Patent Document 1 discloses an absorbent article having a groove having a specific structure in which a top sheet and an absorbent body are integrally recessed. According to the absorbent article disclosed in Patent Document 1, it is possible to quickly absorb and diffuse excretory fluid, eliminate discomfort caused by wearer's wetting, and have a leak-proof groove. It is said that it has moderate flexibility and excellent fit.
  • Patent Document 2 discloses an absorbent article in which a plurality of concave embosses are provided at specific positions of an absorbent body. According to the absorbent article disclosed in Patent Document 2, it is said that it is possible to fit a body curve without a sense of incongruity and to reduce leakage of bodily fluids.
  • the absorbent article disclosed in Patent Document 1 is said to be excellent in flexibility and the like, the strength of the absorbent body (wet strength) due to the grooves having the specific structure described above formed in the absorbent body ) Is low, when the absorbent body absorbs liquid excretion such as urine and menstrual blood, it is crushed in the width direction by the force (crotch tightening force) FW applied from the wearer's legs in the width direction of the absorbent article. As a result, there is a possibility that the absorbent article may be crushed in the width direction to cause a twist as shown in FIG.
  • the absorbent article disclosed in Patent Document 2 since the absorbent article disclosed in Patent Document 2 has a plurality of concave embosses on the absorbent body, the absorbent body has high wet strength, and even if it absorbs liquid excreta, However, since the hardness of the concave embossing itself is hard, the feel of the surface on which the concave embossing is exposed is deteriorated and the wearer feels uncomfortable. There was a fear. As described above, in the conventional absorbent article, it is difficult to achieve both the difficulty of twisting (particularly difficulty of wetting when wet) and a good wearing feeling.
  • an object of the present invention is to provide an absorbent article that is less likely to be twisted even when wet and has an excellent wearing feeling.
  • One aspect (Aspect 1) of the present invention is an absorbent article that includes an absorbent layer having liquid absorbency and has a longitudinal direction, a width direction, and a thickness direction orthogonal to each other, wherein the absorbent layer has the thickness described above. Projecting toward the skin facing surface side of the absorbent article in the direction and continuously extending in a direction intersecting the longitudinal direction, and toward the non-skin facing surface side of the absorbent article in the thickness direction The recesses and recesses extending continuously in parallel with the projections are provided with an uneven structure alternately arranged along the longitudinal direction, and the projections are on the non-skin facing surface side of the absorbent layer It is the said absorbent article which has a cavity part which the surface of the surface faces.
  • the specific concavo-convex structure in which the absorbent layer extends in a direction crossing the longitudinal direction of the absorbent article that is, the concavo-convex structure in which the cross-sectional shape along the longitudinal direction of the absorbent article has a waveform.
  • the compressive strength in the direction in which the concavo-convex structure extends is high, and the force applied from both legs of the wearer is further increased in the concavo-convex structure in the above concavo-convex structure.
  • the absorbent article according to the present embodiment can be dispersed in the thickness direction by the recesses, the absorbent article of this aspect maintains a certain strength even when wet (particularly, the compressive strength in the direction intersecting the longitudinal direction of the absorbent article). I can do it. Furthermore, since the above-mentioned concavo-convex structure can provide moderate flexibility (specifically, ease of bending in the longitudinal direction, cushioning properties in the thickness direction, etc.) and good touch to the absorbent layer. The absorbent article according to the present aspect can provide a wearer with a good feeling of wear by such appropriate flexibility and good touch. Therefore, the absorbent article of this embodiment can realize both the difficulty of twisting (particularly difficulty of wetting when wet) and a good wearing feeling, which were difficult with conventional absorbent articles.
  • the direction intersecting the longitudinal direction is the width direction of the absorbent article.
  • the above uneven structure extends in the width direction of the absorbent article where the force transmitted from the legs of the wearer is the strongest among the directions intersecting the longitudinal direction. Therefore, in the absorbent article of this aspect, the above-described twist is further less likely to occur.
  • a layer having liquid absorbency tends to decrease in strength when absorbing liquid excretion such as urine excreted from the wearer (that is, the wet strength tends to be low).
  • the absorbent article according to the present aspect is more absorbent than the absorbent layer on at least one of the skin-facing surface side and the non-skin-facing surface side of the absorbent layer, the strength of which tends to decrease when wet in the thickness direction. Since a low-absorbing layer having low properties (that is, a relatively high strength when wet) is bonded, the strength of the absorbent layer (particularly wet strength) is reinforced, and a certain level of strength or higher is maintained even when wet. It is easy to maintain, and the above-mentioned twist is more difficult to occur.
  • the low absorption layer is a layer having a thickness larger than that of the absorption layer.
  • the thickness of the above-described low absorption layer is larger than that of the absorption layer, and even in the low absorption layer, the force applied from both legs of the wearer can be dispersed in the thickness direction.
  • the absorbent article of this aspect is more difficult to twist in the direction intersecting the longitudinal direction.
  • the low absorption layer is a layer having relatively high strength when wet, as described above, the above-described twist is less likely to occur particularly when the absorbent article is wet.
  • the low absorbent layer in the absorbent article according to aspect 3 or 4, includes a plurality of heat-fusible fibers and the heat-fusible fibers are fused together.
  • the absorbent layer does not contain heat-fusible fibers, or the content of heat-fusible fibers is lower than that of the low-absorption layer.
  • the absorbent article according to this aspect 5 has a high rigidity because the low-absorbent layer includes heat-fusible fibers and has a plurality of fused portions where the heat-fusible fibers are fused to each other, and intersects the longitudinal direction.
  • the compressive strength (particularly compressive strength when wet) is higher, while the absorbent layer does not contain heat-fusible fibers or contains less mass than the low absorbent layer (mass)
  • the absorbent article of the present aspect is not included in the absorption layer or less than the fusion part in the low absorption layer.
  • the absorbent article according to the present aspect can more surely realize both the above-mentioned difficulty of bending (particularly, difficulty of being wet) and a good wearing feeling.
  • the low-absorbent layer is composed of an air-through nonwoven fabric. In the thickness direction, the absorbent layer is disposed on the non-skin facing surface side.
  • the above-mentioned low-absorbent layer is composed of an air-through nonwoven fabric that is particularly easy to maintain the wet strength, and the air-through nonwoven fabric is formed of the absorbent layer in the thickness direction of the absorbent article. Since it is disposed on the non-skin facing surface side, liquid excretion such as urine can be quickly absorbed into the absorbent layer, and the absorbent layer is reinforced by the air-through nonwoven fabric, so that the wet strength of the absorbent article Can be more reliably maintained, and as a result, the above-mentioned twist (particularly, the twist when wet) can be more reliably prevented.
  • the absorbent article according to Aspect 7 does not include a liquid-absorbing layer in addition to the above-described absorbent layer.
  • the absorbent article of this aspect 7 does not include a liquid-absorbing layer that tends to decrease in strength when wet, in addition to the above-described absorbent layer, it is easy to maintain wet strength as an absorbent article. Therefore, the absorbent article according to this aspect can realize both the difficulty of twisting when wet and a good wearing feeling more reliably.
  • the absorbent layer is a top sheet.
  • the absorbent article of this aspect 8 since the above-described absorbent layer is a surface sheet, liquid excretion such as urine excreted from the wearer can be quickly absorbed and retained in the surface sheet having liquid absorbency. In addition, it is not necessary to separately provide an absorbent body having a liquid absorbing property (or a thin absorbent body is sufficient even if a separate absorbent body is provided), so that the absorbent article can be thinned as a whole. Excellent flexibility and wearing feeling can be obtained.
  • FIG. 1 is a partially broken perspective view of a panty liner 1 according to an embodiment of the present invention.
  • 2 is a partial cross-sectional view of the panty liner 1 according to the embodiment of the present invention, taken along line II-II in FIG.
  • FIG. 3 is a plan view schematically showing a state in which the conventional panty liner 1 ′ is crushed in the width direction by the wearer's crotch tightening force FW and twisted.
  • width direction refers to “a direction in which the length of a vertically long object in a plan view is short (short direction)”
  • longitudinal direction refers to a “length of a vertically long object in a plan view”.
  • ⁇ Long direction '', ⁇ thickness direction '' refers to ⁇ perpendicular to the object placed on the horizontal surface in the unfolded state '', and these width direction, longitudinal direction and thickness direction are respectively They are orthogonal to each other.
  • “relatively proximal to the skin surface of the wearer when wearing the absorbent article” is defined as “skin facing surface”.
  • “Side”, and “the distal side relative to the skin surface of the wearer when the absorbent article is worn” is referred to as “the non-skin facing surface side”.
  • FIG. 1 is a partially cutaway perspective view of a panty liner 1 (absorbent article) according to an embodiment of the present invention
  • FIG. 2 is a partial cross-sectional view of the panty liner 1 taken along line II-II in FIG. is there.
  • FIG. 3 is a plan view schematically showing a state in which the conventional panty liner 1 ′ is crushed in the width direction by the wearer's crotch tightening force FW .
  • the panty liner 1 has a shape whose outer shape is long in the longitudinal direction L in plan view, and the outer edge of the substantially central portion of the longitudinal direction L is slightly in the width direction W. It has a narrow, oblong, vertically long shape.
  • the outer shape of the absorbent article is not particularly limited, and depending on various uses and the like as long as the length dimension in the longitudinal direction L is longer than the width dimension in the width direction W. Any shape (for example, a rectangle, an ellipse, a bowl, etc.) can be adopted.
  • the panty liner 1 which concerns on this embodiment consists of an absorptive sheet
  • the surface 2a on the skin facing surface side of the top sheet 2 forms a surface a on the skin facing surface side of the panty liner 1
  • the surface on the non-skin facing surface side of the back sheet 3 is A surface b on the non-skin facing surface side of the panty liner 1 is formed.
  • between the top sheet 2 and the low absorbent sheet 4 and between the low absorbent sheet 4 and the back sheet 3, as shown in FIG. are joined via the first adhesive layer a 1 and the second adhesive layer a 2 by.
  • a plurality of pressure-sensitive adhesive layers 6 continuously extending in the width direction W are arranged on the surface of the back sheet 3 on the non-skin facing surface side along the longitudinal direction L (so-called , In the form of stripes), and a surface for the non-skin-facing surface of the clothing fixing adhesive portion for protecting the clothing fixing adhesive portion before use.
  • a release sheet 5 is disposed.
  • the pressure-sensitive adhesive forming the pressure-sensitive adhesive layer is not particularly limited as long as it can fix the absorbent article to the wearer's clothes (for example, underwear).
  • any pressure-sensitive adhesive containing a styrene polymer or the like is used.
  • An agent can be used.
  • the arrangement pattern of the adhesive layer in the adhesive part for fixing clothes is not particularly limited, and the adhesive layer may extend intermittently in the width direction W or may extend in the longitudinal direction L. .
  • the panty liner 1 When the panty liner 1 is worn, the above-mentioned release sheet 5 is peeled off, and the panty liner 1 is placed on the non-skin facing surface side surface of the back sheet 3 by the wear fixing adhesive portion. It fixes to the inner surface of the clothes 7 (for example, underwear), and it wears so that the surface sheet 2 may oppose a wearer's skin surface. Then, when liquid excrement such as urine is discharged from the wearer, the liquid excrement is supplied to the surface of the surface sheet 2 of the panty liner 1 on the skin facing surface side, and is absorbed and held in the surface sheet 2.
  • seat is the skin of the said panty liner 1 in the thickness direction T of the panty liner 1
  • Specific concave-convex structure in which concave portions 22 that are recessed in the direction Db toward the non-skin facing surface side of the panty liner 1 and that extend continuously in parallel with the convex portions 21 are alternately arranged along the longitudinal direction L 20 is provided.
  • the convex portion 21 in the concavo-convex structure 20 has a hollow portion 23 that faces the surface 2 b on the non-skin facing surface side of the topsheet 2.
  • the top sheet 2 made of an absorbent sheet has the specific uneven structure 20 extending in the width direction W of the panty liner 1 (that is, as shown in FIG. 2, the longitudinal direction of the panty liner 1).
  • the concavo-convex structure 20 having a corrugated cross-sectional shape along L, the compressive strength in the direction in which the concavo-convex structure 20 extends (that is, the width direction W of the panty liner 1) is high.
  • the panty liner 1 Since the force applied from both legs can be dispersed in the thickness direction T by the convex portion 21 and the concave portion 22 in the concavo-convex structure 20, the panty liner 1 according to the present embodiment is supplied at the time of drying (that is, liquid excrement is supplied). To maintain a certain strength (especially the compressive strength in the width direction W of the panty liner 1) even when wet. Can, twist as described above is less likely to occur. Furthermore, the above-mentioned specific concavo-convex structure 20 has moderate flexibility (specifically, ease of bending in the longitudinal direction L, cushioning properties in the thickness direction T, etc.) and good touch with respect to the top sheet 2. Since it can provide, the panty liner 1 which concerns on this embodiment can provide a wearer with a favorable wearing feeling by such moderate softness
  • the top sheet 2 can be in direct contact with the skin surface of the wearer, and the skin facing surface side in the thickness direction T of the panty liner 1.
  • the surface 2a that forms the surface a on the skin facing surface side of the panty liner 1 and the surface 2b on the non-skin facing surface side that is the surface opposite to the surface 2a are provided.
  • an absorptive sheet having a certain absorptivity and liquid retention is provided.
  • Such a surface sheet 2 is an example of an “absorbing layer having liquid absorbency” in the absorbent article of the present invention.
  • the “liquid absorbency” means a property that has both the absorbability of absorbing liquid such as liquid excrement and the liquid retainability of holding the absorbed liquid,
  • a property that allows the supplied liquid to pass through almost without being retained specifically, the amount of permeation is larger than the amount of retained liquid
  • (Liquid permeability) is a different property.
  • the topsheet 2 has a vertically long plan view shape in a direction along the longitudinal direction L of the panty liner 1 in plan view.
  • the shape of the surface sheet (absorbing layer) is not limited to a specific shape, and any surface shape and size can be adopted.
  • the absorbent sheet constituting the top sheet 2 is not particularly limited as long as it is a liquid-absorbing sheet.
  • a fiber sheet such as a nonwoven fabric, a woven fabric, or a knitted fabric formed from water-absorbing fibers; Arbitrary absorptive sheets, such as a resin sheet formed by the above, can be used.
  • the nonwoven fabric formed with the water absorbing fiber from points, such as liquid absorbency, a softness
  • non-woven fabric used for the top sheet is not particularly limited.
  • any non-woven fabric such as spunlace non-woven fabric, air-through non-woven fabric, spunbond non-woven fabric, point bond non-woven fabric, melt blown non-woven fabric, and combinations thereof (for example, SMS non-woven fabric).
  • SMS non-woven fabric for example, SMS non-woven fabric.
  • hydrophilic fibers as the water-absorbing fibers from the viewpoint of liquid absorbency and liquid retention
  • examples of such hydrophilic fibers include cellulose fibers such as cotton and pulverized pulp; Examples include regenerated cellulose fibers such as rayon and fibril rayon; semi-synthetic cellulose fibers such as acetate and triacetate; thermoplastic resin fibers and composite fibers subjected to hydrophilic treatment.
  • cellulose fibers such as cellulose fibers, regenerated cellulose fibers, and semi-synthetic cellulose fibers because they are excellent in liquid absorbency, liquid retention, flexibility, touch, and the like.
  • the nonwoven fabric used for the top sheet is, in addition to the above-mentioned hydrophilic fibers, polyolefin fibers such as polyethylene (PE) and polypropylene (PP); polyester fibers such as polyethylene terephthalate (PET); hydrophobic fibers such as heat-fusible fibers
  • PE polyethylene
  • PET polyethylene terephthalate
  • hydrophobic fibers such as heat-fusible fibers
  • it may contain a heat-resistant thermoplastic resin fiber, it is preferable to contain a hydrophilic fiber at a mass ratio of 50% by mass or more from the viewpoint of securing a certain level of absorption performance or more.
  • the nonwoven fabric used for the top sheet may contain heat-fusible fibers in order to improve sheet strength in addition to hydrophilic fibers.
  • the nonwoven fabric used for the topsheet does not contain heat-fusible fibers or even if it contains heat-fusible sheets It is preferable to contain by content (mass ratio) smaller than content (mass ratio) of a property fiber.
  • the non-woven fabric used for the top sheet does not contain heat-fusible fibers, or if it contains a lower content than the content of heat-fusible fibers in the low-absorbency sheet, heat-sealing
  • the bonding part (fusion part) formed by fusion of the absorbent fibers does not exist in the nonwoven fabric constituting the surface sheet, or even if it exists, the liquid-absorbing property constituting the low-absorbent sheet is low. Since the number of joints (fused parts) in the low-absorbent sheet is smaller than that of the low-absorbent sheet, the surface sheet has a lower rigidity than the low-absorbent sheet, and the surface sheet has an appropriate flexibility. It becomes easy to ensure the property and good touch.
  • an absorbent article provided with such a surface sheet and a low-absorbency sheet is difficult to twist due to the above-described low-absorbency sheet (low-absorbent layer) having low liquid absorbency (particularly difficult to twist when wet).
  • the above-mentioned absorption layer With the above-mentioned absorption layer, it is easy to ensure moderate flexibility and good touch.
  • the basis weight of the surface sheet (absorbing layer) is not particularly limited as long as it does not impair the effects of the present invention, and any basis weight that takes into account absorbability, liquid retention, difficulty in twisting, flexibility, etc. may be adopted. it can.
  • Examples of such a basis weight include a basis weight within a range of 10 g / m 2 to 100 g / m 2 , and preferably within a range of 20 g / m 2 to 50 g / m 2 .
  • the basis weight can be measured according to JIS L 1906 5.2.
  • the thickness of the surface sheet (absorbing layer) is not particularly limited as long as it does not impair the effects of the present invention.
  • a thickness in the range of 0.001 mm to 5.0 mm can be adopted. From the standpoints of holding property, difficulty in twisting, flexibility, and touch, it is preferably in the range of 0.01 mm to 3.0 mm, and more preferably in the range of 0.1 mm to 1.0 mm.
  • the thickness of the top sheet and the low-absorbency sheet described below can be measured according to the following ⁇ Measurement method of thickness of various sheets>. In addition, it can measure similarly about the thickness of various sheets (for example, back sheet etc.) other than a surface sheet and a low absorption sheet.
  • a sample sheet having a predetermined size (for example, 100 mm ⁇ 100 mm) is cut out from the measurement target sheet.
  • the cut sample sheet is set in an automated compression tester “KES FB-3A” manufactured by Kato Tech Co., Ltd., and the thickness (mm) when the pressure on the sample sheet by the measurement terminal of the tester is 49 Pa. ) And the measured thickness (mm) is taken as the thickness of the sample sheet.
  • the surface sheet 2 protrudes in the direction Da toward the skin opposing surface side of the said panty liner 1 in the thickness direction T of the panty liner 1, and of the panty liner 1
  • a convex portion 21 extending continuously in the width direction W, and a concave portion 22 recessed in the direction Db toward the non-skin facing surface side of the panty liner 1 in the thickness direction T and continuously extending in parallel with the convex portion 21.
  • the protrusion 21 has a surface 2 b on the non-skin-facing surface side of the surface sheet 2. It has a facing cavity 23.
  • the surface sheet 2 as the absorbent layer includes the specific concavo-convex structure 20 extending in the width direction W of the panty liner 1 so that the concavo-convex structure 20 extends.
  • the width direction W is high in compressive strength, and furthermore, the force applied from both legs of the wearer can be dispersed in the thickness direction T by the convex portions 21 and the concave portions 22 in the concave-convex structure 20 described above. Needless to say, a constant strength (particularly, compressive strength in the width direction W) can be maintained even when wet, and twisting is less likely to occur.
  • the specific concavo-convex structure 20 imparts appropriate softness (specifically, ease of bending in the longitudinal direction L, cushioning property in the thickness direction T, etc.) and good touch to the top sheet 2. Therefore, the panty liner 1 according to the present embodiment can provide a wearer with a better wearing feeling due to such appropriate flexibility and good touch.
  • the convex portion 21 and the concave portion 22 extend in the width direction W of the panty liner 1. If it is the “direction intersecting the longitudinal direction” of the article, it is not limited to the “width direction” in the above embodiment.
  • the “direction intersecting the longitudinal direction” of the absorbent article means a direction in which an angle with the longitudinal direction of the absorbent article is within a range of 45 ° or more and 90 ° or less.
  • the absorbent article of the present invention has a specific concavo-convex structure in which the absorbent layer extends in a direction intersecting the longitudinal direction of the absorbent article, so that the compressive strength in the direction in which the concavo-convex structure extends is high.
  • the force applied from both legs can be dispersed in the thickness direction by the projections and depressions in the concavo-convex structure described above, so that even when wet, a constant strength (especially the compressive strength in the direction intersecting the longitudinal direction of the absorbent article) ) Can be maintained, and twisting is less likely to occur.
  • the panty liner 1 among the “direction intersecting the longitudinal direction” of the panty liner 1 (absorbent article), the “width direction” on which the force transmitted from both legs of the wearer is most strongly applied, Since the concavo-convex structure 20 described above extends, the panty liner 1 according to the present embodiment is less likely to cause the above-described twist.
  • the pitch of the protrusions in the concavo-convex structure is not particularly limited, and is, for example, 0.5 mm to 5.0 mm. Although a pitch within the range can be adopted, it is preferably within a range of 1.0 mm to 4.0 mm from the viewpoint of cushioning properties and touch.
  • the pitch of this convex part can be measured as a space
  • the surface sheet 2 in this embodiment is joined to the low-absorbency sheet 4 on the surface 2b on the non-skin facing surface side of the recess 22 of the uneven structure 20.
  • the low absorbent sheet 4 is not an essential component in the absorbent article of the present invention. Therefore, when the absorbent article does not have such a low absorbent sheet, a surface sheet is used. May be bonded to the absorber or the back sheet (if it also does not have an absorber) on the non-skin facing surface side surface of the concave portion of the concave-convex structure.
  • the means for joining the top sheet and these constituent members is not particularly limited, and for example, a heat-melting method such as a hot-melt adhesive or heat sealing. Any joining means can be employed.
  • the method for forming the above-described specific concavo-convex structure on the top sheet is not particularly limited, and for example, any shaping method such as a method using gear stretching or a method using vacuum forming or press forming may be adopted. Can do.
  • the surface sheet 2 is comprised as an absorption layer which has liquid absorptivity.
  • the topsheet is configured as an absorbent layer having liquid absorbency, liquid excreta such as urine excreted from the wearer can be quickly absorbed and retained in the topsheet having liquid absorbency.
  • a layer having excellent liquid absorbency such as an absorber generally has a tendency to decrease in strength when wet, and the absorbent article is likely to be twisted. Therefore, the absorption layer having the above-described specific uneven structure (surface having liquid absorbency) By configuring the absorbent article so as not to include a layer having excellent liquid absorbency such as an absorbent body other than the sheet, the wet strength of the absorbent article is less likely to be reduced (that is, when wet) It will be difficult to absorb absorbent articles).
  • the absorbent article has a surface sheet having the above-described specific concavo-convex structure as an absorbent layer having liquid absorbency and does not include a liquid absorbent layer in addition to the surface sheet, It is possible to more reliably realize both the difficulty of twisting and the excellent wearing feeling.
  • the low absorbent sheet 4 having low liquid absorbency is positioned between the top sheet 2 and the back sheet 3 in the thickness direction T of the panty liner 1 as shown in FIG. And is bonded to the top sheet 2 and functions to reinforce the strength (particularly the wet strength) of the top sheet (absorbing layer).
  • Such a low-absorbency sheet 4 is lower in liquid absorbency than the above-described surface sheet 2 (absorbing layer) (that is, has a relatively high strength when wet). 2, the strength (particularly the wet strength) of the topsheet 2 is reinforced, and the panty liner 1 can easily maintain a certain strength or more even when wet, and the twist becomes even less likely to occur. Yes.
  • the sheet material constituting the low-absorbency sheet is not particularly limited as long as it has lower liquid absorbency than the absorbent layer, but from the viewpoint of wet strength, difficulty of twisting, flexibility, etc., use a hydrophobic nonwoven fabric. Is preferred.
  • the degree of hydrophobicity is sufficient if it is hydrophobic to the extent that it does not absorb the dropped water when water is dropped on the surface of the hydrophobic nonwoven fabric, Hydrophobic (so-called water repellency) to the extent that when the water is dripped onto the surface of the hydrophobic nonwoven fabric, the dripped water is repelled on the surface of the hydrophobic nonwoven fabric to form water droplets in terms of wet strength and difficulty in twisting. More preferably,
  • the type of the hydrophobic nonwoven fabric used for the low-absorbency sheet is not particularly limited as long as it has a lower liquid absorbency than the absorbent layer.
  • the same type of nonwoven fabric as the above-described topsheet is used. be able to.
  • the low absorption layer is composed of an air-through nonwoven fabric that is particularly easy to maintain wet strength and is bonded to the surface of the absorption layer on the non-skin facing surface side, liquid absorption waste such as urine is quickly absorbed into the absorption layer.
  • the absorbent layer is reinforced by the low-absorbent layer, so that the wet strength of the absorbent article can be more reliably maintained, and as a result, the above-described twist (particularly, the twist when wet) can be more reliably achieved. Can be prevented.
  • the low-absorbency sheet is composed of a hydrophobic nonwoven fabric having a single-layer structure using a hydrophobic nonwoven fabric alone, it is from a hydrophobic laminated nonwoven fabric having a laminated structure using two or more hydrophobic nonwoven fabrics. It may be configured.
  • the low-absorbency sheet is composed of a hydrophobic laminated nonwoven fabric, the wet strength and flexibility of the absorbent article can be easily adjusted by adjusting the number of laminated layers of the hydrophobic laminated nonwoven fabric.
  • the fiber constituting the hydrophobic nonwoven fabric used for the low-absorbency sheet is not particularly limited as long as it has hydrophobicity.
  • polyolefin fibers such as PE and PP; polyester fibers such as PET
  • a hydrophobic thermoplastic resin fiber such as various composite fibers such as a core-sheath composite fiber can be used.
  • the hydrophobic nonwoven fabric used for the low absorption layer may contain heat-fusible fibers in order to improve rigidity.
  • the above-mentioned absorption layer contains heat-fusible fibers.
  • the heat-fusible fiber is contained in a content (mass ratio) larger than the content (mass ratio) of the heat-fusible fiber in the absorption layer.
  • the hydrophobic nonwoven fabric used for the low-absorbing layer contains heat-fusible fibers in a content higher than the content of the heat-fusible fibers in the absorbent layer
  • the heat-fusible fibers in the hydrophobic nonwoven fabric Since the number of joints (fused parts) formed by the fusion of the resin is larger than the number of joints (fused parts) in the nonwoven fabric constituting the absorbent layer, the rigidity of the low absorbent layer is greater than that of the absorbent layer. It becomes high, and it becomes easy to ensure moderate softness
  • the basis weight of the low-absorbency sheet is not particularly limited as long as the effect of the present invention is not impaired, and any basis weight considering wet strength, flexibility and the like can be adopted.
  • Examples of such a basis weight include a basis weight within a range of 20 g / m 2 to 200 g / m 2 , and preferably within a range of 30 g / m 2 to 100 g / m 2 .
  • seat consists of the above-mentioned hydrophobic laminated nonwoven fabric
  • the total basic weight of the basic weight of each layer which comprises the said hydrophobic laminated nonwoven fabric should just be in the above-mentioned range.
  • the thickness of the low-absorbency sheet is not particularly limited as long as the effect of the present invention is not impaired.
  • a thickness in the range of 0.01 mm to 8.0 mm can be adopted. From the viewpoint of wet strength and flexibility, it is preferably in the range of 0.05 mm to 5.0 mm, more preferably in the range of 0.1 mm to 3.0 mm.
  • the total thickness of each layer which comprises the said hydrophobic laminated nonwoven fabric should just be in the above-mentioned range.
  • the thickness of the low-absorbency sheet is preferably larger than the thickness of the absorption layer. If the thickness of the low absorption layer is larger than the thickness of the absorption layer, the force applied from the legs of the wearer can be dispersed in the thickness direction even in the low absorption layer, making the absorbent article more difficult to twist. Can do.
  • the low absorption layer is a layer having a relatively high strength when wet as described above, the above-described twist can be further prevented from occurring particularly when the absorbent article is wet.
  • the topsheet 2 low absorbent sheet 4 has been bonded to each other via the first adhesive layer A 1 consisting of a hot melt adhesive, in the present invention, the absorption layer and the low absorbing layer
  • the bonding form is not limited to such a form as long as the effect of the present invention is not hindered, and the absorbing layer and the low absorbing layer may be bonded by any bonding means such as heat fusion.
  • the joined portion fused portion
  • the bonding state can be maintained well, and the function of reinforcing the absorption layer by the above-described low absorption layer can be more reliably exhibited. As a result, twisting is less likely to occur in the absorbent article.
  • the low absorbent sheet 4 (low absorbent layer) is disposed on the non-skin facing surface side of the top sheet 2 (absorbent layer) in the thickness direction T of the panty liner 1 (absorbent article).
  • the low absorption layer may be arrange
  • the absorbent article of the present invention since the low absorbent sheet (low absorbent layer) is not an essential component, the absorbent article is made of a low absorbent sheet (low in consideration of flexibility of the absorbent article). It is also possible to adopt a configuration in which the absorption layer) is omitted.
  • the back sheet 3 is disposed at a position on the non-skin facing surface side in the thickness direction T of the panty liner 1 and is discharged from the wearer while having air permeability. It is configured by a liquid-impermeable sheet that functions to prevent permeation of liquid excrement such as urine and prevent the liquid excretion from leaking into the clothes of the wearer.
  • the liquid-impermeable sheet constituting the back sheet 3 is not particularly limited.
  • a hydrophobic nonwoven fabric a resin film such as polyethylene or polypropylene having air permeability, a laminate in which the nonwoven fabric is bonded to the resin film, SMS Arbitrary liquid-impermeable sheets, such as laminated nonwoven fabrics, can be used.
  • a hydrophobic nonwoven fabric it is preferable to use a hydrophobic nonwoven fabric in terms of liquid impermeability, wet strength, flexibility, and the like.
  • the degree of hydrophobicity is the same as the above-described low-absorbency sheet, and when water is dropped on the surface of the hydrophobic nonwoven fabric, it does not absorb the dropped water. Hydrophobic is sufficient, but when water is dropped on the surface of the hydrophobic nonwoven fabric from the viewpoints of wet strength, difficulty in spilling, and difficulty in leaking liquid excreta, It is more preferable that it is hydrophobic (so-called water repellency) to the extent that it is repelled to form water droplets.
  • the kind of hydrophobic nonwoven fabric used for the back sheet is not particularly limited as long as the effect of the present invention is not impaired.
  • any nonwoven fabric such as spunbond nonwoven fabric, point bond nonwoven fabric, meltblown nonwoven fabric, and SMS nonwoven fabric may be employed. Can do.
  • the lower limit of the fineness of the fibers constituting the ultrafine fiber layer is not particularly limited, but is, for example, about 0.1 dtex.
  • the SMS nonwoven fabric is a laminated nonwoven fabric having a three-layer structure of spunbond / meltblown / spunbond, and the SMS nonwoven fabric has both air permeability and a certain strength (particularly due to the spunbond layer).
  • it is a nonwoven fabric that can more effectively suppress the permeation of liquid excrement (especially by the meltblown layer that is an ultrafine fiber layer), when using such a nonwoven fabric as a back sheet, in the back sheet, Leakage of liquid excreta can be more effectively suppressed while ensuring excellent air permeability and difficulty in bending (especially when it is wet).
  • constituent fiber of the hydrophobic nonwoven fabric used for the back sheet is not particularly limited as long as it has hydrophobicity.
  • polyolefin fibers such as PE and PP
  • polyester fibers such as PET
  • core-sheath type composite fibers Hydrophobic thermoplastic resin fibers such as various composite fibers can be used.
  • the basis weight of the back sheet is not particularly limited as long as it does not hinder the effects of the present invention, and any basis weight considering wet strength, flexibility, air permeability, liquid impermeability, etc. may be adopted. it can.
  • Examples of such a basis weight include a basis weight within a range of 8 g / m 2 to 60 g / m 2 , and preferably within a range of 15 g / m 2 to 50 g / m 2 .
  • the thickness of the back sheet is not particularly limited as long as the effect of the present invention is not impaired.
  • a thickness in the range of 0.01 mm to 5.0 mm can be adopted, but the wet strength and flexibility, From the viewpoint of air permeability and liquid impermeability, it is preferably in the range of 0.05 mm to 3.0 mm.
  • the panty liner 1 includes the top sheet 2, the low absorbent sheet 4, and the back sheet 3 between the sheets (that is, the top sheet 2 and the low absorbent sheet 4. And between the low-absorbent sheet 4 and the back sheet 3), which are joined to each other via the first adhesive layer A 1 and the second adhesive layer A 2 made of hot-melt adhesive. Yes.
  • the first adhesive layer and the second sheet are respectively provided.
  • the arrangement pattern of the adhesive in the first adhesive layer A 1 and the second adhesive layer A 2 is each a plurality spiral arrangement pattern of longitudinally extending L
  • the arrangement pattern is not limited to such an arrangement pattern, and an arbitrary arrangement pattern such as an omega shape, a wavy line shape, a zigzag shape, a stripe shape, or a belt shape extending in the longitudinal direction and / or the width direction is adopted. Can do.
  • each arrangement pattern does not overlap in the thickness direction of an absorbent article ( That is, it is preferable that the arrangement pattern of the first adhesive layer and the arrangement pattern of the second adhesive layer do not overlap in plan view.
  • each junction point that can be a starting point of bending is formed in a certain number or more, so that absorption The strength of the entire absorbent article is improved and the absorbent article is more difficult to twist, and more appropriate flexibility can be provided. Thereby, it is possible to more effectively and reliably realize both the difficulty of twisting (particularly, difficulty of twisting when wet) and the excellent wearing feeling.
  • the arrangement pattern in which the first adhesive layer and the second adhesive layer do not overlap in the thickness direction of the absorbent article refers to the arrangement pattern of the first adhesive layer and the arrangement pattern of the second adhesive layer.
  • a mode in which each arrangement pattern partially overlaps in the thickness direction of the absorbent article is also included.
  • the means for joining the sheets is not particularly limited as long as the effect of the invention is not hindered.
  • the sheets may be joined together by arbitrary joining such as heat fusion. It may be joined by means.
  • the joined portions fused portions
  • the joined portions are not easily affected by decomposition by liquid excrement such as urine, so joining even when the absorbent article is wet. The state can be maintained satisfactorily, and the absorbent article is less likely to be twisted.
  • the panty liner 1 does not include an absorbent body for absorbing and holding liquid excrement such as urine in addition to the top sheet 2 as an absorbent layer, but in the absorbent article of the present invention. May be provided with such an absorber as long as the effects of the present invention are not impaired. Specifically, as long as the absorbent article of the present invention does not impair the effects of the present invention, for example, the absorbent article can absorb and retain liquid excretion at a position between the top sheet and the low absorbent sheet. The body may be placed.
  • the absorber is not particularly limited as long as it can absorb and retain liquid excreta, and any absorber known in the art can be used.
  • an absorbent core made of an absorbent material is covered with a core wrap sheet such as a hydrophilic tissue.
  • the absorbent material constituting the absorbent core include hydrophilic fibers and superabsorbent polymers. More specifically, cellulose fibers such as pulverized pulp and cotton; regenerated cellulose fibers such as rayon and fibrillar rayon. A semi-synthetic cellulose fiber such as acetate and triacetate; a granular material composed of a superabsorbent polymer such as sodium acrylate copolymer; and any combination of two or more of these.
  • the present invention can be applied to various absorbent articles such as sanitary napkins and (light) incontinence pads in addition to the panty liner of the above-described embodiment.
  • the absorbent article of the present invention is not limited to the above-described embodiment, and can be appropriately combined and changed without departing from the object and spirit of the present invention.
  • ordinal numbers such as “first” and “second” are used to distinguish items with the ordinal numbers, and mean the order, priority, importance, etc. of each item. Not what you want.
  • Panty liner an example of an absorbent article
  • Top sheet an example of an absorbent layer having liquid absorbency
  • Back sheet 4
  • Low absorption sheet an example of a low absorption layer
  • Release sheet 6
  • Adhesive layer 7 Clothing A 1 1st adhesive layer A 2 2nd adhesive layer

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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)
PCT/JP2016/085808 2016-03-23 2016-12-01 吸収性物品 Ceased WO2017163492A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201680083699.XA CN108883012B (zh) 2016-03-23 2016-12-01 吸收性物品
KR1020187025450A KR102433718B1 (ko) 2016-03-23 2016-12-01 흡수성 물품
MYPI2018703219A MY184943A (en) 2016-03-23 2016-12-01 Absorbent article

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JP2016-059124 2016-03-23
JP2016059124A JP6223490B2 (ja) 2016-03-23 2016-03-23 吸収性物品

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005052225A (ja) * 2003-08-06 2005-03-03 Uni Charm Corp 体液吸収構造体及びその製法
JP2007014635A (ja) * 2005-07-08 2007-01-25 Kao Corp 吸収性物品

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000271170A (ja) * 1999-03-25 2000-10-03 Uni Charm Corp 表面構造体を有する吸収性物品
SG114551A1 (en) * 2001-06-08 2005-09-28 Uni Charm Corp Absorbent article and methods of manufacturing the same
CN2885193Y (zh) * 2003-12-25 2007-04-04 尤妮佳股份有限公司 贴身衬垫
JP4705541B2 (ja) 2006-09-25 2011-06-22 大王製紙株式会社 吸収性物品
JP5552091B2 (ja) 2011-05-27 2014-07-16 花王株式会社 吸収性物品
JP6091135B2 (ja) 2012-09-28 2017-03-08 ユニ・チャーム株式会社 水解性吸収性物品
JP5707467B2 (ja) * 2013-10-18 2015-04-30 ユニ・チャーム株式会社 吸収性物品の製造装置、及び製造装置の改造方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005052225A (ja) * 2003-08-06 2005-03-03 Uni Charm Corp 体液吸収構造体及びその製法
JP2007014635A (ja) * 2005-07-08 2007-01-25 Kao Corp 吸収性物品

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KR102433718B1 (ko) 2022-08-17
CN108883012B (zh) 2022-03-04
JP2017169804A (ja) 2017-09-28
KR20180125955A (ko) 2018-11-26
CN108883012A (zh) 2018-11-23
MY184943A (en) 2021-04-30

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