WO2020246383A1 - 吸収性物品 - Google Patents

吸収性物品 Download PDF

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Publication number
WO2020246383A1
WO2020246383A1 PCT/JP2020/021337 JP2020021337W WO2020246383A1 WO 2020246383 A1 WO2020246383 A1 WO 2020246383A1 JP 2020021337 W JP2020021337 W JP 2020021337W WO 2020246383 A1 WO2020246383 A1 WO 2020246383A1
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WO
WIPO (PCT)
Prior art keywords
resin film
liquid
impermeable resin
exterior
woven fabric
Prior art date
Application number
PCT/JP2020/021337
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
歩美 永橋
Original Assignee
大王製紙株式会社
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 大王製紙株式会社 filed Critical 大王製紙株式会社
Publication of WO2020246383A1 publication Critical patent/WO2020246383A1/ja

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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
    • A61F13/45—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
    • A61F13/514—Backsheet, i.e. the impermeable cover or layer furthest from 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
    • A61F13/56—Supporting or fastening means

Definitions

  • the present invention relates to absorbent articles such as pad-type absorbent articles used by being fixed to the inner surface of lower body underwear (hereinafter, also simply referred to as underwear) without inseam such as briefs and shorts.
  • Absorbent articles such as disposable diapers and sanitary napkins include an absorber, a liquid-permeable top sheet that covers the front side of the absorber, and a liquid-impermeable resin film that covers the back side of the absorber as basic elements. ing. Further, in order to make the outer surface of the product feel like a cloth, it is often practiced to cover the back side of the liquid-impermeable resin film with an exterior non-woven fabric. In this case, the exterior non-woven fabric and the liquid-impermeable resin film are generally adhered via a hot melt adhesive over the entire area where they overlap.
  • the main object of the present invention is to suppress the deterioration of the appearance due to the wrinkles of the exterior nonwoven fabric.
  • the present inventor adhered the liquid-impermeable resin film and the exterior non-woven fabric in a state where tension was applied during production, and after releasing the tension, the exterior non-woven fabric was released. It was found that a large number of fine wrinkles are generated on the exterior non-woven fabric as a result of the liquid-impermeable resin film shrinking more than that.
  • the absorbent articles described below solve the above problems based on this finding.
  • a liquid-impermeable resin film that covers the back side of the absorber and It has an exterior non-woven fabric that covers the back side of the liquid-impermeable resin film.
  • the exterior non-woven fabric is adhered to the liquid-impermeable resin film.
  • the design is printed on the liquid-impermeable resin film. The design is visible from the outer surface of the product through the exterior non-woven fabric.
  • absorbent articles The region that overlaps with at least a part of the design is a non-adhesive region in which the exterior nonwoven fabric and the liquid-impermeable resin film are not adhered.
  • An absorbent article characterized by that.
  • the region that overlaps at least a part of the design is a non-adhesive region in which the exterior nonwoven fabric and the liquid-impermeable resin film are not adhered, the region is larger than the exterior nonwoven fabric during production. Even if the liquid-impermeable resin film shrinks significantly, wrinkles are not formed on the exterior nonwoven fabric, at least in the non-adhesive region. Therefore, at least in the non-adhesive region, the wrinkles of the exterior non-woven fabric do not stand out against the background of the design, and the appearance of the design does not deteriorate.
  • the liquid-impermeable resin film and the exterior non-woven fabric extend over the front and rear edges of the absorbent article.
  • the design is printed on the liquid-impermeable resin film at the front end and the rear end of the absorbent article.
  • the front end portion and the rear end portion of the absorbent article are adhesive regions in which the exterior nonwoven fabric and the liquid-impermeable resin film are adhered.
  • a liquid-impermeable resin film and an exterior non-woven fabric often extend over the front and rear edges of the article, and the design is printed on the front and rear edges of the article. Often there is.
  • a non-adhesive region up to the front and rear ends of the article.
  • a gap between the exterior non-woven fabric and the liquid-impermeable resin film may open at the front and rear ends of the article, which may lead to deterioration of appearance and wearing feeling. Therefore, as in this aspect, it is preferable that the front and rear ends of the article are not an adhesive region but an adhesive region even if there is a design.
  • the liquid-impermeable resin film and the exterior non-woven fabric extend over both side edges of the absorbent article.
  • the design is printed on the liquid-impermeable resin film on both sides of the absorbent article. Both sides of the absorbent article are adhesive regions to which the exterior nonwoven fabric and the liquid-impermeable resin film are adhered.
  • the absorbent article of the first or second aspect is adhesive regions to which the exterior nonwoven fabric and the liquid-impermeable resin film are adhered.
  • An elastic member is fixed between the liquid-impermeable resin film and the exterior non-woven fabric, or on the front surface of the liquid-impermeable resin film, and the fixed portion of the elastic member is an elastic region contracted together with the elastic member. It has become The design is printed on the liquid-impermeable resin film in the stretchable region.
  • the stretchable region is an adhesive region in which the exterior non-woven fabric and the liquid-impermeable resin film are adhered.
  • an elastic member is fixed between the liquid-impermeable resin film and the exterior non-woven fabric, or on the front surface of the liquid-impermeable resin film.
  • a stretchable area is formed, and the design is often printed in the stretchable area.
  • the elastic member may not be fixed, or the wrinkles formed in the stretchable region may become unnecessarily large and irregular. Therefore, as in this aspect, it is preferable that the stretchable region is not a non-adhesive region but an adhesive region even if there is a design.
  • a pad-type absorbent article having a crotch portion including the center in the anteroposterior direction, a front portion extending forward from the center in the anteroposterior direction, and a rear portion extending posteriorly from the center in the anteroposterior direction.
  • An adhesive layer is provided on the back surface of the exterior nonwoven fabric.
  • the design is printed on the liquid-impermeable resin film in the region having the pressure-sensitive adhesive layer.
  • the region having the pressure-sensitive adhesive layer is an adhesive region in which the exterior non-woven fabric and the liquid-impermeable resin film are bonded.
  • the exterior nonwoven fabric having the adhesive layer may be displaced from the liquid-impermeable resin film to which the adhesive layer is fixed, and the adhesive layer may not sufficiently prevent the pad-type absorbent article from being displaced. is there. Therefore, as in this embodiment, it is preferable that the region having the pressure-sensitive adhesive layer is not a non-adhesive region but an adhesive region even if there is a design.
  • ⁇ Sixth aspect> Prepare a test piece in which the front and rear edges of the exterior non-woven fabric and the liquid-impermeable resin film are aligned with each other, and the exterior non-woven fabric and the liquid-impermeable resin film maintain the adhesive state of the product.
  • the exterior non-woven fabric and the liquid-impermeable resin film were removed and the dimensions of the exterior non-woven fabric alone in the front-rear direction and the dimensions of the liquid-impermeable resin film alone were measured in the unfolded state, respectively.
  • the ratio of the dimension in the front-rear direction of the liquid-impermeable resin film alone to the dimension in the front-rear direction of the exterior nonwoven fabric alone is 97.5 to 99.0%.
  • the liquid-impermeable resin film and the exterior non-woven fabric are not particularly limited, but wrinkles are more likely to occur on the exterior non-woven fabric especially when the difference in shrinkage ratio is large. Therefore, in the case of the combination of the liquid-impermeable resin film and the exterior non-woven fabric as in this embodiment, the wrinkle-suppressing effect is particularly remarkable when the above-mentioned non-adhesive region is provided (the technical significance is great).
  • FIG. 1 is a sectional view taken along the line AA of FIG. It is a cross-sectional view of BB of FIG. (A) is a cross-sectional view taken along the line CC of FIG. 1, and (b) is a cross-sectional view taken along the line DD of FIG. It is a perspective view which shows the usage method of a pad type disposable diaper schematicly. It is a top view which shows the back side of the pad type disposable diaper in the unfolded state.
  • FIG. 1 to 5 show a pad-type disposable diaper 200.
  • the dotted pattern portion in the cross-sectional view shows an adhesive as a joining means for joining the constituent members located on the front side and the back side thereof, and is a solid, bead, curtain, summit or spiral coating of hot melt adhesive, or pattern coating.
  • the fixed part of the elastic member is formed by (transfer of hot melt adhesive by the letterpress method) or by coating the elastic member on the outer peripheral surface of the elastic member such as comb gun or sure wrap coating instead of or together with this. is there.
  • hot melt adhesive examples include EVA type, adhesive rubber type (elastomer type), olefin type, polyester / polyamide type and the like, but they can be used without particular limitation.
  • a joining means for joining each component a means by material welding such as a heat seal or an ultrasonic seal can also be used.
  • the pad-type disposable diaper 200 has a crotch portion M including the center 201 of the anteroposterior LD, a front portion F1 extending anterior to the center 201 of the anteroposterior LD, and extending posteriorly of the center 201 of the anterior-posterior LD. It has a rear portion B1 to be used.
  • the dimensions of each part can be appropriately determined.
  • the total length (length in the front-rear direction) L1 of the article can be about 200 to 480 mm, and the total width W1 can be about 120 to 200 mm.
  • the pad-type disposable diaper 200 includes an absorber 23 built in a range including the crotch portion M, a liquid-permeable top sheet 22 that covers the front side of the absorber 23, and a liquid-impermeable resin that covers the back side of the absorber 23. It has a film 21 and.
  • the non-woven fabric in the following description a known non-woven fabric can be appropriately used depending on the site and purpose.
  • constituent fibers of the non-woven fabric examples include olefin-based fibers such as polyethylene and polypropylene, polyester-based and polyamide-based synthetic fibers (including single-component fibers and composite fibers such as core sheaths), as well as recycled rayon and cupra. Fibers, natural fibers such as cotton, and the like can be selected without particular limitation, and these can be mixed and used. In order to increase the flexibility of the non-woven fabric, it is preferable that the constituent fibers are crimped fibers.
  • the non-woven fabric generally has a short fiber non-woven fabric, a long fiber non-woven fabric, a spunbond non-woven fabric, a melt blown non-woven fabric, a spunlace non-woven fabric, a thermal bond (air-through) non-woven fabric, and a needle punch depending on the fiber length, the sheet forming method, the fiber bonding method, and the laminated structure.
  • non-woven fabrics It is classified into non-woven fabrics, point-bonded non-woven fabrics, laminated non-woven fabrics (SMS non-woven fabrics having a melt blown layer sandwiched between spunbond layers, SMMS non-woven fabrics, etc.), and any of these non-woven fabrics can be used.
  • SMS non-woven fabrics having a melt blown layer sandwiched between spunbond layers, SMMS non-woven fabrics, etc.
  • the absorber 23 a composite fiber of pulp fibers, an aggregate of filaments such as cellulose acetate, or a non-woven fabric is basically used, and a highly absorbent polymer is mixed and fixed as needed. .. If necessary, the absorber 23 can be wrapped with crepe paper or a non-woven fabric (not shown). Further, the shape of the absorber 23 can be an appropriate shape such as a rectangular shape, but in the illustrated example, a constricted portion 23n narrower than both front and rear sides is provided in the range of the front-rear direction LD including the crotch portion M. It has a shape (approximately an hourglass shape).
  • the fiber weight and the weight of the absorbent polymer in the absorber 23 can be appropriately determined, but the fiber weight is preferably about 100 to 600 g / m 2, and the weight of the absorbent polymer is about 0 to 400 g / m 2. It is preferable to do so.
  • a liquid-impermeable resin film 21 is provided on the back side of the absorber 23.
  • the liquid-impermeable resin film 21 in addition to a polyethylene film or the like, a sheet having moisture permeability without impairing water shielding can be used from the viewpoint of preventing stuffiness.
  • This water-impervious / moisture-permeable sheet is a microporous sheet obtained by melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet in a uniaxial or biaxial direction. Can be used.
  • the liquid-impermeable resin film 21 protrudes around the absorber 23, but does not have to protrude around the absorber 23.
  • the outer surface (back surface) of the liquid-impermeable resin film 21 is covered with the exterior non-woven fabric 25.
  • Various non-woven fabrics can be used as the exterior non-woven fabric 25.
  • the front side of the absorber 23 is covered with a top sheet 22.
  • the absorber 23 partially protrudes from the side edge of the top sheet 22, but the width of the top sheet 22 can be widened so that the side edge of the absorber 23 does not protrude.
  • a perforated or non-perforated non-woven fabric, a perforated plastic sheet, or the like is used as the top sheet 22 .
  • the front and rear ends of the pad-type disposable diaper 200 are end flap portions EF in which the absorber 23 does not exist, which extend from the front and rear ends of the absorber 23 to both front and rear sides, respectively.
  • the material constituting the end flap portion EF is not particularly limited, but in the illustrated example, the portions of the liquid-impermeable resin film 21, the exterior non-woven fabric 25, and the top sheet 22 extending to both the front and rear sides of the absorber 23. It has become.
  • both sides of the pad-type disposable diaper 200 are side flap portions SF extending to the side of the absorber.
  • the material constituting the side flap portion SF is not particularly limited, but in the illustrated example, the width direction of the absorber 23 in the liquid-impermeable resin film 21, the exterior non-woven fabric 25, the top sheet 22, and the gather sheet 62. It is a part that extends to both sides of the WD. Including these, the materials can be bonded by welding the materials such as heat seal and ultrasonic seal in addition to the hot melt adhesive shown by the dot pattern in the drawing.
  • both sides of the widthwise WD of the surface of the disposable diaper stand up from the side of the top sheet 22 toward the skin (protrusion).
  • the rising gather 60 is provided over the entire front-rear direction.
  • the root portion 65 fixed to the region including the side flap portion SF, the protruding portion 66 extending from the root portion 65, and both ends of the protruding portion in the front-rear direction are fixed in an inverted state.
  • the rising gather 60 is formed by a gather sheet 62 folded back at the tip, and a plurality of gather elastic members 63 may be provided at intervals as shown in the illustrated example, or one each may be provided.
  • the elongation rate of the portion having the gathered elastic member 63 is not particularly limited, but is usually preferably 150 to 350%, more preferably 200 to 300%.
  • the root portion 65 of the rising gather 60 in the illustrated example is provided only on the side flap portion SF, and is joined to the side portion of the liquid-impermeable resin film 21 and the side portion of the exterior nonwoven fabric 25, but the side flap portion It may extend from the SF to the side of the region overlapping the absorber 23.
  • both ends of the LD in the front-rear direction are inverted portions, but the portion between them is a non-fixed rising portion 68, and the rising portion 68 is a contraction of the gather elastic member 63.
  • the diaper is attached, the diaper is attached to the body in a boat shape, and the contraction force of the gather elastic member 63 acts on the diaper. Therefore, the contraction force of the gather elastic member 63 causes the gather 60 to stand up and elastically adhere to the legs. As a result, so-called lateral leakage from around the legs is prevented.
  • the material of the gather sheet 62 a plastic sheet or a melt-blown non-woven fabric can be used, but from the viewpoint of touch to the skin, a non-woven fabric treated with water repellent treatment such as silicone is preferably used.
  • a non-woven fabric treated with water repellent treatment such as silicone is preferably used.
  • the gather elastic member 63 styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicone, polyester, etc., which are formed in a thread shape, a string shape, a strip shape, etc., are usually used. The material used can be used.
  • Each side flap portion SF has an elongated side elastic member 64 extending in the front-rear direction LD in the range of the front-rear direction LD including the crotch portion M, and the region having the side elastic member 64 is a side elastic member. It has an elastic region A1 (side gather) that is contracted in the front-rear direction LD due to the contraction of 64 and can be extended in the front-rear direction LD. As shown in the illustrated example, the side elastic member 64 is provided between the gather sheet 62 and the liquid-impermeable resin film 21 on the outside of the width direction WD near the joint start end in the joint portion of the gather sheet 62, and also on the side.
  • the liquid-impermeable resin film 21 can also be provided between the liquid-impermeable resin film 21 and the exterior non-woven fabric 25 in the flap portion SF.
  • only one side elastic member 64 may be provided on each side, or a plurality of side elastic members 64 may be provided on each side.
  • the side elastic member 64 the same material as the gather elastic member 63 can be used.
  • the side elastic member 64 may exist only in the expansion / contraction region A1, or may exist on the front side, the rear side, or both sides of the expansion / contraction region A1. In the latter case, the side elastic member 64 may be finely cut at one place or a large number of places other than the expansion / contraction region A1, may not be fixed to the sheet sandwiching the side elastic member 64, or may be both. Therefore, the non-stretchable region A2 (substantially equivalent to not providing an elastic member) is set.
  • the range of the anterior-posterior LD of the telescopic region A1 can be appropriately determined, but it is desirable to include at least the crotch portion M, and when the absorber 23 has the constricted portion 23n, up to the same anteroposterior position as the anteroposterior end portion thereof. It is preferable that it extends to both sides of the anteroposterior LD.
  • the adhesive layer 30 is provided on the back surface of the pad-type disposable diaper 200, that is, on the back surface of the exterior nonwoven fabric 25 in the illustrated example. As shown in the illustrated example, it is desirable that the pressure-sensitive adhesive layer 30 is peelably coated with a release sheet 31 and the release sheet 31 is peeled off to expose the pressure-sensitive adhesive layer 30 at the time of use.
  • the adhesive layer 30 is continuously provided along the front-rear direction, but it may be provided on each of the front side portion F1 and the rear side portion B1, or may be provided on only one of them, or the front and back of the crotch portion M or the like. It may be provided only in the middle part of the direction.
  • a plurality of pressure-sensitive adhesive layers 30 it is preferable to provide at least one of each in the front side portion F1 and the rear side portion B1.
  • the pressure-sensitive adhesive layer 30 is preferably sized and arranged so that the entire adhesive layer 30 fits within the region overlapping the absorber 23.
  • the width W3 of the pressure-sensitive adhesive layer 30 is about 60 to 80% of the width W2 of the absorber 23, and the length L3 in the front-rear direction (total length when a plurality of adhesive layers are provided in the front-rear direction) is the total length L2 of the absorber 23. It is preferably about 60 to 110%, or about 60 to 100% of the total length of the article L1.
  • the pressure-sensitive adhesive layer 30 may extend from the region overlapping the absorber 23 to the end flap portion EF.
  • Designs 40 to 43 are printed on the liquid-impermeable resin film 21.
  • Designs 40 to 43 are visibly provided as designs 40 to 43 from the outer surface of the product, that is, the ground color (usually white, light blue, light green) of the liquid-impermeable resin film 21 and the exterior non-woven fabric 25.
  • the shape and the like are not particularly limited as long as they are provided in different colors.
  • Designs 40 to 43 include, for example, decorative patterns (including polka dots and floral patterns, as well as pictures and one-point characters), usage and landmarks 40 (use assistance), functional displays such as size, manufacturers, and It can be a product name, a mark display such as a characteristic function, or a combination of a plurality of these. Designs 40 to 43 may be printed on the back surface of the liquid impermeable resin film 21, but are printed on the front surface of the liquid impermeable resin film 21 as long as they are visible from the outer surface of the product. You may.
  • the mark 40 for confirming the mounting position is printed on the liquid-impermeable resin film 21 as a design. More specifically, in the example shown in FIG. 7, a mark 40 for confirming the mounting position can be visually recognized from the back side (outside) of the pad-type disposable diaper 200 at a portion to be located at the lowermost 101 of the underwear 100 on both sides. It is provided as such.
  • the pad-type disposable diaper 200 can be attached to the underwear 100 as shown in FIG.
  • the mark 40 can be used for this mounting.
  • the marks 40 on both sides of the pad type disposable diaper 200 exposed from the leg opening LO of the underwear 100 are placed on the underwear 100.
  • the "part that should be located at the bottom 101 of the underwear 100" can be appropriately determined depending on the product, but when the shape and structure are symmetrical in the front-back direction as shown in the illustrated example, it can be the center of the LD in the front-back direction. Further, when the absorber 23 has the constricted portion 23n, the center of the constricted portion 23n in the front-rear direction can be set as "a portion to be located at the lowermost portion 101 of the underwear 100".
  • the mark 40 can be appropriately selected from those capable of displaying the position, such as a circle (example shown in FIG. 8), a triangle, a quadrangle, a star shape (example shown in FIG. 7), an arrow shape, or a character.
  • the mark 40 can be provided by printing, can also be provided by shape processing such as embossing, or can be provided in combination of both. Since the embossed mark 40 has irregularities, there is an advantage that the position can be grasped by touching the mark 40 when it is difficult to see.
  • the mark 40 may be provided on any existing member as long as it can be seen from the back side of the pad-type disposable diaper 200, or a dedicated member may be added.
  • the mark 40 may be printed on the back surface of the liquid-impermeable resin film 21 so that the mark 40 can be seen through the exterior non-woven fabric 25.
  • a printing sheet made of paper or the like on which the mark 40 is printed is interposed between the liquid-impermeable resin film 21 and the exterior non-woven fabric 25 so that the mark 40 of the printing sheet can be seen through the exterior non-woven fabric 25. May be good.
  • the mark 40 may be printed directly on the back surface of the exterior nonwoven fabric 25.
  • the size of the mark 40 can be appropriately determined, but the size (total length) of the LD in the front-rear direction should be 8 to 20 mm in consideration of displaying a local part and visibility in normal use.
  • the dimension (total width) of the WD in the width direction is preferably 8 to 20 mm.
  • the position of the mark 40 should be closer to the side edge. Therefore, in the pad type disposable diaper 200 having the side flap portion SF as shown in the illustrated example, it is preferable to provide the pad type disposable diaper 200 on the side flap portion SF.
  • the distance 40d between the side edge of the pad-type disposable diaper 200 and the mark 40 in the width direction WD is preferably 35 mm or less.
  • the mark 40 is lateral to the side edge of the constricted portion 23n and is WD center in the width direction from the side elastic member 64. It is preferable that it is provided on the side.
  • the pad-type disposable diaper 200 having the constricted portion 23n and the side flap portion SF as described above has a ship shape in a state of being attached to the underwear by providing the side elastic member 64 on the side flap portion SF, and particularly around the legs of the wearer. The fit to is high.
  • the side flap portion SF of the crotch portion M is exposed from the leg opening LO of the underwear 100 in a state of being attached to the underwear.
  • the portion having the mark 40 is contracted by the side elastic member 64, the mark 40 may be hidden in the wrinkles or the shape of the mark 40 may be deformed, so that the mark 40 may be difficult to see.
  • the mark 40 is provided on the side of the side edge of the constricted portion 23n and on the WD center side in the width direction of the side elastic member 64. If so, the mark 40 is not located at the portion where the wrinkles are formed deepest (that is, it does not overlap with the side elastic member 64), so that the deterioration of the visibility of the mark 40 can be suppressed.
  • the distance 64d between the side edge of the pad-type disposable diaper 200 and the side elastic member 64 in the width direction WD is preferably 15 mm or less.
  • the expansion / contraction region A1 by the side elastic member 64 is provided on both front and rear sides of the mark 40, and the range of the front-rear direction LD having the mark 40 is preferably the non-stretchable region A2. .. As described above, when the range of the front-rear direction LD having the mark 40 is the non-stretchable region A2, the mark 40 is less likely to be hidden in the wrinkles or the shape of the mark 40 is less likely to collapse, and the visibility of the mark 40 becomes visible. Becomes good.
  • the marks 41 for confirming the deviation are provided so as to be visible from the back side at each position at intervals on both the front and rear sides of the mark 40. Is preferable. In this way, if the mark 41 for checking the deviation is provided at each position spaced apart from each other on both the front and rear sides of the mark 40 for checking the mounting position, as shown in FIG. It is preferable because it is easy to understand (however, FIG. 10 shows a state in which there is no deviation).
  • misalignment confirmation mark 41 when viewed from the front of the underwear 100 while attached to the underwear 100, if only the misalignment confirmation mark 41 can be seen on both sides of the pad type disposable diaper 200 exposed from the leg opening LO of the underwear 100, the mounting position. It becomes clear at a glance that is shifted later.
  • the deviation confirmation mark 41 has the same shape and dimensions as the above-mentioned mounting position confirmation mark 40, and can be formed on the same member by the same means.
  • a vertical reference line 42 adjacent to the inside of the width direction WD of each mark 40 for confirming the mounting position and extending linearly in the front-rear direction LD, and these vertical reference lines 42.
  • a horizontal reference line 43 extending linearly in the width direction WD is provided so as to be visible from the back side of the pad-type disposable diaper 200 along the portion between the two, which should be located at the lowermost portion 101 of the underwear 100. It is also preferable to have it.
  • the vertical reference line 42 and the horizontal reference line 43 it becomes easy to grasp the orientation of the pad-type disposable diaper 200 when it is attached to the underwear 100.
  • the vertical reference line 42 is adjacent to the mark 40.
  • the vertical reference line 42 is also exposed from the leg opening LO of the underwear 100 when attached to the underwear 100, the orientation of the pad-type disposable diaper 200 when attached to the underwear 100 by visually recognizing the vertical reference line 42. Can be easily confirmed if is appropriate.
  • the vertical reference line 42 and the horizontal reference line 43 can be formed on the same member as the above-mentioned mark 40 for confirming the mounting position by the same means.
  • the vertical reference line 42 has a width 42w of about 7 to 30 mm
  • the side edge of the pressure-sensitive adhesive layer 30 has a width-wise separation distance 42d with respect to the edge of the vertical reference line 42 on the width direction WD center side. It is preferably 10 mm or less and extends linearly along the anteroposterior LD. Since the vertical reference line 42 and the side edge of the adhesive layer 30 have such a positional relationship, the pad type disposable diaper 200 can be easily adjusted while adjusting the orientation of the pad type disposable diaper 200 with reference to the vertical reference line 42. Can be attached to the underwear 100.
  • non-adhesive area, adhesive area As shown in FIGS. 3, 4 and 7, the region overlapping at least a part of the designs 40 to 43 is a non-adhesive region 10 (in the figure) in which the exterior nonwoven fabric 25 and the liquid-impermeable resin film 21 are not adhered. Area with a diagonal line pattern). Therefore, even if the liquid-impermeable resin film 21 shrinks more than the exterior nonwoven fabric 25 during manufacturing, wrinkles are not formed on the exterior nonwoven fabric 25 at least in the non-adhesive region 10. Therefore, at least in the non-adhesive region 10, the wrinkles of the exterior nonwoven fabric 25 do not stand out against the background of the designs 40 to 43, and the appearance of the designs 40 to 43 does not deteriorate.
  • FIG. 11A is a photograph of a sample when the region overlapping the design (vertical reference line 42) is the adhesive region 11
  • FIG. 11B is a design (vertical) having the same pattern as that of FIG. It is a photograph of the sample when the non-adhesive region 10 is provided in the region overlapping the reference line 42).
  • FIG. 11A when the region overlapping the design (vertical reference line 42) is the adhesive region of the exterior nonwoven fabric 25 and the liquid-impermeable resin film 21, fine wrinkles 15 are formed on the exterior nonwoven fabric 25. Wrinkles 15 are conspicuous in the area where the design (vertical reference line 42) overlaps with each other, and the appearance is deteriorated.
  • wrinkles are not formed and deterioration of the appearance is suppressed.
  • the non-adhesive area is the same as or covers the entire area overlapping the designs 40 to 43. It is preferable to have 10. However, as described below, it is preferable that the region where the designs 40 to 43 are located is not the non-adhesive region 10 but the adhesive region 11 depending on the portion.
  • the liquid-impermeable resin film 21 and the exterior non-woven fabric 25 extend over the front and rear edges of the article, and designs 40 to 43 are printed on the front and rear ends of the pad-type disposable diaper 200.
  • the non-adhesive region 10 is provided up to the front and rear ends of the pad-type disposable diaper 200, the gap between the exterior non-woven fabric 25 and the liquid-impermeable resin film 21 opens at the front and rear ends of the pad-type disposable diaper 200, and looks good. And may lead to deterioration of wearing comfort. Therefore, as shown in FIG.
  • this portion is the non-adhesive region 10. It is preferable that the outer non-woven fabric 25 and the liquid-impermeable resin film 21 are adhered to each other in the adhesive region 11. In this case, within a range of 20 mm from the front end and the rear end of the pad-type disposable diaper 200 to the center side of the LD in the front-rear direction, it is preferable that the portion without the design 40 to 43 print occupies an area of 80% or more. ..
  • the size of the LD in the front-rear direction of the adhesive region 11 can be appropriately determined, and is usually about 2 to 40 mm.
  • the non-adhesive region 10 when the non-adhesive region 10 is provided up to the front and rear ends of the pad type disposable diaper 200, if the width is narrow, for example, about 2 to 30 mm, the gap of the non-adhesive region 10 is provided.
  • the opening is inconspicuous, and deterioration of appearance and fit can be suppressed.
  • the portion without the design 40 to 43 print occupies 90% or more of the area.
  • the size of the WD in the width direction of the adhesive region 11 can be appropriately determined, and is usually about 2 to 40 mm.
  • an elastic member (side elastic member 64) is fixed to the front surface of the liquid-impermeable resin film 21 to form an elastic region A1 and the elastic region A1 is formed.
  • the designs 40 to 43 are printed on the region A1
  • the non-adhesive region 10 is provided up to the elastic region A1
  • the wrinkles 15 formed in the elastic region A1 become unnecessarily large and irregular.
  • an elastic member is provided between the liquid-impermeable resin film 21 and the exterior nonwoven fabric 25, if the non-adhesive region 10 is provided up to the stretchable region A1, the elastic member cannot be fixed at that portion. Therefore, as shown in FIGS.
  • the stretchable region A1 is the exterior non-woven fabric. It is preferable that the adhesive region 11 is formed by bonding the 25 and the liquid-impermeable resin film 21. In this case, in the stretchable region A1, it is preferable that the portion having no design 40 to 43 print occupies 90% or more of the area.
  • the adhesive layer 30 for the purpose of preventing slippage is provided on the back surface of the exterior nonwoven fabric 25, and the design 40 extends to the region having the adhesive layer 30.
  • the exterior nonwoven fabric 25 having the adhesive layer 30 is fixed to the liquid-impermeable resin film 21.
  • the adhesive layer 30 will be misaligned and the pad-type absorbent article will not be sufficiently displaced. Therefore, as shown in FIGS. 7 and 8, even if the designs 40 to 43 are printed on the liquid-impermeable resin film 21 in the region having the adhesive layer 30, the region having the adhesive layer 30 is still present.
  • the outer non-woven fabric 25 and the liquid-impermeable resin film 21 are adhered to each other in the adhesive region 11.
  • the portion having no design 40 to 43 print occupies 90% or more of the area.
  • the liquid-impermeable resin film 21 and the exterior nonwoven fabric 25 are not particularly limited, but when the difference in shrinkage ratio is large, wrinkles 15 are more likely to occur on the exterior nonwoven fabric 25. Therefore, in a normal case, a specimen in which the front and rear edges of the exterior nonwoven fabric 25 and the liquid-impermeable resin film 21 are aligned and the exterior nonwoven fabric 25 and the liquid-impermeable resin film 21 maintain the adhesive state of the product is used.
  • the exterior non-woven fabric 25 and the liquid-impermeable resin film 21 of this specimen are removed, and in the unfolded state, the dimensions of the exterior non-woven fabric 25 alone and the front-rear direction of the liquid-impermeable resin film 21 alone are
  • the ratio of the dimensions in the front-rear direction of the liquid-impermeable resin film 21 alone to the dimensions in the front-rear direction of the exterior nonwoven fabric 25 alone is 97.5 to 99.0%.
  • the non-adhesive region 10 of the above is provided, the effect of suppressing the wrinkle 15 is particularly remarkable (that is, when the liquid-impermeable resin film 21 shrinks to some extent more than the exterior non-woven fabric 25 after releasing the tension during production).
  • the specimen can be the product itself.
  • the exterior nonwoven fabric 25 and the liquid-impermeable resin film 21 maintain the adhesive state of the product.
  • the above dimensions can be measured by cutting out a specimen whose front and rear edges of the transparent resin film 21 match.
  • the "front-back direction” means the direction indicated by the symbol LD in the figure (vertical direction), and the “width direction” means the direction indicated by the WD in the figure (horizontal direction), and the front-back direction and the width direction. Are orthogonal.
  • Front surface means the surface of the member that is closer to the wearer's skin when worn
  • back surface means the surface of the member that is farther from the wearer's skin when worn.
  • Elongation rate means the value when the natural length is 100%. For example, an elongation rate of 200% is synonymous with an elongation ratio of 2 times.
  • Methodsuke is measured as follows. After pre-drying the sample or test piece, leave it in a test room or device under standard conditions (test location: temperature 23 ⁇ 1 ° C., relative humidity 50 ⁇ 2%) to bring it to a constant weight. Pre-drying refers to making a sample or test piece constant in an environment at a temperature of 100 ° C. It is not necessary to pre-dry the fibers having an official moisture content of 0.0%. A sample having a size of 100 mm ⁇ 100 mm is cut out from the test piece in a constant weight state using a sampling template (100 mm ⁇ 100 mm). The weight of the sample is measured and multiplied by 100 to calculate the weight per square meter, which is used as the basis weight.
  • the "thickness" is automatically measured using an automatic thickness measuring device (KES-G5 handy compression measurement program) under the conditions of a load of 0.098 N / cm 2 and a pressurized area of 2 cm 2 .
  • KS-G5 handy compression measurement program automatic thickness measuring device
  • Expanded state means a state in which it is deployed flat without shrinkage or slack.
  • the dimensions of each part mean the dimensions in the unfolded state, not in the natural length state.
  • test or measurement shall be performed in a test room or equipment under standard conditions (test location: temperature 23 ⁇ 1 ° C, relative humidity 50 ⁇ 2%). To do.
  • the present invention can be used for pad-type disposable diapers having an adhesive layer on the back surface, sanitary napkins, and other pad-type absorbent articles fixed to the inner surface of underwear.

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dermatology (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
PCT/JP2020/021337 2019-06-03 2020-05-29 吸収性物品 WO2020246383A1 (ja)

Applications Claiming Priority (2)

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JP2019-103913 2019-06-03
JP2019103913A JP7295705B2 (ja) 2019-06-03 2019-06-03 吸収性物品

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TW (1) TW202045111A (enrdf_load_stackoverflow)
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005103178A (ja) * 2003-10-02 2005-04-21 Kao Corp 吸収性物品
JP2013074980A (ja) * 2011-09-30 2013-04-25 Daio Paper Corp 使い捨ておむつ
JP2017217318A (ja) * 2016-06-09 2017-12-14 大王製紙株式会社 パンツタイプ使い捨ておむつ

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008136515A (ja) 2006-11-30 2008-06-19 Oji Nepia Kk パンツ型使い捨ておむつ
JP5754986B2 (ja) 2011-03-02 2015-07-29 ユニ・チャーム株式会社 使い捨ておむつ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005103178A (ja) * 2003-10-02 2005-04-21 Kao Corp 吸収性物品
JP2013074980A (ja) * 2011-09-30 2013-04-25 Daio Paper Corp 使い捨ておむつ
JP2017217318A (ja) * 2016-06-09 2017-12-14 大王製紙株式会社 パンツタイプ使い捨ておむつ

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