WO2019188565A1 - Structure étirable pour article vestimentaire jetable et article vestimentaire jetable de type culotte ayant une structure étirable - Google Patents

Structure étirable pour article vestimentaire jetable et article vestimentaire jetable de type culotte ayant une structure étirable Download PDF

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Publication number
WO2019188565A1
WO2019188565A1 PCT/JP2019/011377 JP2019011377W WO2019188565A1 WO 2019188565 A1 WO2019188565 A1 WO 2019188565A1 JP 2019011377 W JP2019011377 W JP 2019011377W WO 2019188565 A1 WO2019188565 A1 WO 2019188565A1
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Prior art keywords
nonwoven fabric
fabric layer
holes
sheet
interval
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PCT/JP2019/011377
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English (en)
Japanese (ja)
Inventor
彩 草野
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大王製紙株式会社
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Publication of WO2019188565A1 publication Critical patent/WO2019188565A1/fr

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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
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • 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
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/496—Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/514—Backsheet, i.e. the impermeable cover or layer furthest from the skin

Definitions

  • the present invention relates to a stretchable structure of a disposable wearing article and a pants-type disposable wearing article having the stretchable structure.
  • a stretchable structure in order to improve the fit of each part.
  • a disposable diaper of a pants type or a tape type it is widely performed to provide a stretchable structure in the waistline direction at the waistline part or to provide a stretchable structure in a direction along the leg circumference at the leg circumference part.
  • sanitary napkins are also widely used to provide longitudinal stretch structures called three-dimensional gathers and flat gathers (for example, patents). Reference 1 to 3).
  • a typical example of such a stretchable structure for a disposable wearing article is an elongated elastic member provided between the overlapping first nonwoven fabric layer and the second nonwoven fabric layer along the stretch direction and spaced from each other. It is to be prepared.
  • the first non-woven fabric layer and the second non-woven fabric layer form a planar stretchable region and play a role of covering and concealing the elastic member, and the elastic member built in between the first non-woven fabric layer and the second non-woven fabric layer is elastic stretch It plays the role of generating power for
  • the elastic member is fixed in the first nonwoven fabric layer and the second nonwoven fabric layer at least at both ends of the stretchable region in the stretched state.
  • the elastic member, the first nonwoven fabric layer, and the second nonwoven fabric layer are integrated, and the first nonwoven fabric layer and the second nonwoven fabric layer are contracted by the contraction force of the elastic member to include wrinkles (including ridges).
  • the elastic member is stretched not only in the natural length state but also in a stretched state
  • the elastic member is stretched against the contraction force of the elastic member
  • the wrinkles are deployed.
  • the first nonwoven fabric layer and the second nonwoven fabric layer are in a developed state having no wrinkles at the limit of elastic elongation, wrinkles are accompanied with the contraction of the elastic member, and wrinkles are most closely gathered in the natural length state.
  • an elastic member is extended over the whole expansion-contraction direction of an expansion-contraction area
  • region is a 1st nonwoven fabric layer and a 2nd nonwoven fabric layer
  • the first nonwoven fabric layer and the second nonwoven fabric layer need to be contracted as the elastic member contracts. That is, it is necessary to join the first nonwoven fabric layer and the second nonwoven fabric layer and to fix the elastic member to the first nonwoven fabric layer and the second nonwoven fabric layer.
  • a hot melt adhesive is almost always selected.
  • the bonding form between the first nonwoven fabric layer and the second nonwoven fabric layer is often performed by welding such as ultrasonic welding in order to reduce the amount of hot melt adhesive used.
  • the form performed by is also used persistently. For example, by joining the first nonwoven fabric layer and the second nonwoven fabric layer via a hot melt adhesive at the passing position of the elastic member, the first nonwoven fabric layer and the second nonwoven fabric layer can be joined.
  • the first nonwoven fabric layer and the second nonwoven fabric layer are arranged in the direction perpendicular to the expansion / contraction direction and are intermittently arranged in the expansion / contraction direction, in addition to the combined use of fixing the elastic member to the nonwoven fabric layer. And a mode in which the first nonwoven fabric layer and the second nonwoven fabric layer are joined via a hot melt adhesive that is intermittently arranged in a direction orthogonal to the stretching direction and that is substantially continuous in the stretching direction. It has been. (See Patent Documents 1 to 6)
  • Patent Documents 7 and 8 are bonded to the first nonwoven fabric layer and the second nonwoven fabric layer by an adhesive applied in the form of a spiral or stripe on the entire surface of one nonwoven fabric layer, and the first nonwoven fabric layer.
  • the elastic member is fixed to the second nonwoven fabric layer.
  • the formation of the holes in the first nonwoven fabric layer and the second nonwoven fabric layer is performed by melting, cutting out, or punching before or after joining the first nonwoven fabric layer and the second nonwoven fabric layer.
  • Patent Document 9 is formed by welding the joint portions of the first nonwoven fabric layer and the second nonwoven fabric layer with an interval in the expansion / contraction direction and the direction orthogonal thereto, and then overlapping the joint portions with holes. To form.
  • the thing of patent document 9 WHEREIN Since joining of a 1st nonwoven fabric layer and a 2nd nonwoven fabric layer is an edge of a hole, and an elastic member does not cross a joined part, air permeability in parts other than a hole, flexible It is considered that a ridge that extends excellently across the elastic member is formed by the arrangement of the joints. However, in the case of the one described in Patent Document 9, such beautiful wrinkles are not formed unless bonding and perforation are performed at the same time. For example, when the thing of patent document 9 is manufactured using the nonwoven fabric in which the hole penetrated in the thickness direction was formed beforehand, since the position of a hole and a junction part has to shift, it is a valley located between ridges.
  • the part is formed not only in the row portion of the joint portion but also in the row portion of the hole where the nonwoven fabric layer is likely to be bent, so that the wrinkles are branched and the trough valley portion is partially widened. There is a risk that the appearance will deteriorate due to the regular shape.
  • a main problem of the present invention is to provide a stretchable structure for disposable wearing articles that is excellent in air permeability and flexibility and in which a more organized bag is formed.
  • the stretchable structure of the disposable wearing article that has solved the above problems is as follows. ⁇ First aspect> Along the stretch direction, the first nonwoven fabric layer and the second nonwoven fabric layer, which are partly or entirely overlapped, and arranged between the first nonwoven fabric layer and the second nonwoven fabric layer with an interval in the orthogonal direction perpendicular to the stretch direction.
  • a plurality of elongated elastic members extending The elastic member is fixed to the first nonwoven fabric layer and the second nonwoven fabric layer at least at both ends in the stretchable direction in the stretchable region,
  • the stretchable region has a sheet joint portion where the first nonwoven fabric layer and the second nonwoven fabric layer are joined, At least one of the first nonwoven fabric layer and the second nonwoven fabric layer is a perforated nonwoven fabric in which holes penetrating in the thickness direction are arranged.
  • the sheet joint is formed in a striped pattern that is spaced apart in the orthogonal direction and substantially continuous in the expansion and contraction direction
  • the array of holes is an array of holes arranged at intervals in the orthogonal direction, and arranged at intervals in the expansion and contraction direction, The interval in the orthogonal direction of the holes in the row of holes is narrower than the interval in the orthogonal direction of the sheet joint portion, A stretchable structure for a disposable wearing article.
  • the sheet joint portion is formed in a striped pattern that is spaced in the orthogonal direction orthogonal to the stretch direction and substantially continuous in the stretch direction, so that it has good air permeability and flexibility. Can be secured.
  • the first nonwoven fabric layer and the second nonwoven fabric layer are integrated in each sheet bonding portion.
  • the wrinkles are formed in a wave shape along each other.
  • the first nonwoven fabric layer and the second nonwoven fabric generally follow the shape of the first nonwoven fabric layer and the second nonwoven fabric layer in the sheet joint portion. Corrugations are formed on both the front and back surfaces of the layers so as to be wavy.
  • the first nonwoven fabric layer and the second nonwoven fabric layer can be freely deformed in the region between the adjacent sheet joint portions.
  • the portion having the holes is weak and easily bends in a state where the holes can be deformed independently.
  • the first nonwoven fabric layer and the second nonwoven fabric layer is a perforated nonwoven fabric, and there is a hole in one region across the sheet joint portion, there is no hole in the other region, In this area, a wrinkle is formed so that the hole becomes a crease, whereas in the other area, a wrinkle that does not align with this is formed (not in the orthogonal direction).
  • the ridges branch or the valleys partially widen, making it difficult to form a uniform ridge as a whole.
  • the hole arrangement is such that the hole rows arranged in the orthogonal direction are spaced apart in the expansion / contraction direction, and the holes in the orthogonal direction in the hole row are arranged.
  • holes exist in all the regions between adjacent sheet joint portions, and the holes form a row in the direction perpendicular to the expansion and contraction direction.
  • a continuous ridge in which the hole becomes a crease is easily formed over the entire area delimited by the joint portion. That is, the ridges are less likely to branch or the valleys are partially widened, and as a whole, well-organized ridges extending along the row of holes are easily formed.
  • the sheet joining portion is “substantially continuous in the stretching direction”, as described in Patent Document 4, at least the direction orthogonal to the stretching direction (the first nonwoven fabric layer and the unfolded state) It means that it is continuous (continuous without interruption) when viewed from the direction parallel to the second nonwoven fabric layer and orthogonal to the elastic stretchable member, and as long as the sheet junction is continuous in the stretchable direction (first nonwoven fabric layer).
  • the second nonwoven fabric layer are continuously joined in the stretching direction), and the sheet joint portion is intermittently arranged in the stretching direction (the first nonwoven layer and the second nonwoven layer are intermittent in the stretching direction). It is also meant to include forms that are joined together.
  • the interval in the orthogonal direction of the holes in the row of holes is not less than 1/6 and less than 1/2 of the interval in the orthogonal direction of the sheet joint portion.
  • the sheet joint is formed by a hot melt adhesive disposed in a portion overlapping the elastic member.
  • Such a sheet joint portion can be manufactured by sandwiching an elastic member coated with a hot melt adhesive between the first nonwoven fabric layer and the second nonwoven fabric layer, and is widely used in the field of disposable wearing articles. Yes.
  • the first nonwoven fabric layer and the second nonwoven fabric layer shrink together with the elastic member at the sheet joint portion, and the fiber structure becomes dense. Therefore, in principle, wrinkles are easily cut off at the sheet joint.
  • the influence of the holes becomes dominant with respect to the formation of the wrinkles. Regardless, as a whole, it is easy to form a well-shaped ridge extending along the row of holes.
  • ⁇ Fourth aspect> The diameter of the hole in the perforated nonwoven fabric decreases as it goes from the opposite side to the opposing nonwoven layer side to the opposing nonwoven layer side, The elastic structure of the disposable wearing article according to any one of the first to third aspects.
  • the diameter of the hole means a dimension in a direction that passes through the center of gravity of the hole and is orthogonal to the expansion / contraction direction (therefore, the diameter is a circle in the case of an ellipse, and the major axis is an ellipse).
  • the hole has a dimension in the expansion / contraction direction of 0.3 to 3.0 mm and a dimension in the orthogonal direction of 0.3 to 5.0 mm,
  • the orthogonal spacing of the holes in the row is 1.0 to 5.0 mm;
  • An interval in the stretch direction of the row is 2.5 to 10.0 mm;
  • An interval between the sheet joints in the orthogonal direction is 5 to 10 mm;
  • the dimension of the sheet joint portion in the orthogonal direction is 0.5 to 5.0 mm.
  • the hole array of the perforated nonwoven fabric is a matrix in which a row of holes linearly arranged at a predetermined interval in the orthogonal direction repeats at a predetermined interval in the expansion / contraction direction,
  • the elastic structure of the disposable wearing article according to any one of the first to fifth aspects.
  • the nonwoven fabric layer on the skin side of the wearer is a nonporous nonwoven fabric
  • the opposite nonwoven fabric layer is the porous nonwoven fabric
  • the nonwoven fabric layer on the skin side By making the nonwoven fabric layer on the skin side a non-porous nonwoven fabric, it is possible to eliminate the influence of the pores on the touch. Moreover, since only one of the first nonwoven fabric layer and the second nonwoven fabric layer has a hole, the skin is not exposed at the time of wearing, and leakage through the hole can be prevented.
  • the wrinkles formed on the skin-side nonwoven fabric layer are thin wrinkles, and the wrinkles formed on the opposite nonwoven fabric layer are thick wrinkles that are gently bent. Therefore, since the contact area between the skin-side nonwoven fabric layer and the skin is small and the gap between the heel and the heel increases, the air permeability is particularly excellent. The opposite side of the ridge is unlikely to be deformed to impair the beauty such as falling down, and has excellent shape stability.
  • Both the first nonwoven fabric layer and the second nonwoven fabric layer are the perforated nonwoven fabric, and the holes of one perforated nonwoven fabric do not overlap with the holes of the other perforated nonwoven fabric,
  • the elastic structure of the disposable wearing article according to any one of the first to seventh aspects.
  • ⁇ Ninth aspect> An integrated exterior body from the front body to the back body, or an exterior body provided separately for the front body and the back body, and an interior body that is attached to the middle part in the width direction of the exterior body and covers both the front and back of the crotch part
  • the exterior body in at least one of the front body and the back body has a stretchable structure according to any one of the first to eighth aspects over at least a width direction range corresponding to the space between the side seal portions in a partial range in the front-rear direction. Is provided so that the expansion / contraction direction of the expansion / contraction region is the width direction, A pants-type disposable wearing article characterized by that.
  • the above-described stretchable structure is suitable for an exterior body of a pants-type disposable wearing article.
  • FIG. 2 is a sectional view taken along line 2-2 of FIG.
  • FIG. 3 is a cross-sectional view taken along the line 3-3 in FIG. 1.
  • FIG. 8 (A) 4-4 sectional view of FIG. 8 and (b) 5-5 sectional view of FIG. It is a top view which shows the example of arrangement
  • 11A is a sectional view taken along the line 6-6 in FIG. 11
  • FIG. 11B is a sectional view taken along the line 7-7 in FIG. 11, and FIG. It is a top view which expands and shows the principal part of the exterior body of the expansion
  • Hot melt adhesives can be applied by known methods such as slot coating, continuous line or dotted line bead coating, spiral coating, Z coating, etc., or pattern coating (transfer of hot melt adhesive in relief printing). Can be applied. Instead of or together with this, at the fixing portion of the elastic member, the hot melt adhesive can be applied to the outer peripheral surface of the elastic member, and the elastic member can be fixed to the adjacent member.
  • hot melt adhesives examples include EVA, adhesive rubber (elastomer), olefin, and polyester / polyamide types, which can be used without any particular limitation.
  • a joining means for joining the constituent members means by material welding such as heat sealing or ultrasonic sealing can be used.
  • the pants-type disposable diaper shown in FIGS. 1 to 6 includes a front exterior body 12F constituting the front body F, a rear exterior body 12B constituting the rear body B, and a rear exterior body from the front exterior body 12F through the crotch portion.
  • An interior body 200 provided inside the exterior bodies 12F and 12B so as to extend to the body 12B. Both side portions of the front exterior body 12F and both side portions of the rear exterior body 12B are joined to form a side seal portion 12A.
  • the openings formed by the front and rear end portions of the exterior bodies 12F and 12B become the waist openings WO through which the wearer's torso passes, and the lower edges of the exterior bodies 12F and 12B and the interior body 200 on both sides in the width direction of the interior body 200.
  • the portions surrounded by the side edges are leg openings LO through which the legs pass.
  • the interior body 200 is a portion that absorbs and holds excrement such as urine, and the exterior bodies 12F and 12B are portions that support the interior body 200 with respect to the wearer's body.
  • the symbol Y in the figure indicates the total length of the diaper in the unfolded state (the length in the front-rear direction from the edge of the waist opening WO of the front body F to the edge of the waist opening WO of the back body B), and the symbol X in the unfolded state. The full width of the diaper is shown.
  • the pants-type disposable diaper includes a waist region T defined as a front-rear direction range (a front-rear direction range extending from the waist opening WO to the upper end of the leg opening LO) having the side seal portion 12A, and a portion that forms the leg opening LO.
  • An intermediate region L defined as a front-rear direction range (between a front-rear direction region having the side seal portion 12A of the front body F and a front-rear direction region having the side seal portion 12A of the rear body B).
  • the waistline region T can be divided into a “waist portion” W that conceptually forms the edge of the waist opening and a “waist lower portion” U that is a lower portion than this.
  • the waist opening WO side is more waist-like than the waist opening WO side boundary.
  • the waist opening WO side becomes the waist portion W with respect to the absorbent body 56 or the interior body 200.
  • These lengths in the front-rear direction vary depending on the size of the product and can be determined as appropriate.
  • the waist portion W can be 15 to 40 mm and the waist lower portion U can be 65 to 120 mm.
  • both side edges of the intermediate region L are wrapped in a U-shape or a curved shape along the circumference of the leg of the wearer, and this is a portion into which the wearer's leg is put.
  • the unfolded pants-type disposable diaper has a substantially hourglass shape as a whole.
  • the fixing of the inner body 200 to the outer bodies 12F and 12B is not particularly limited, and can be performed by, for example, a hot melt adhesive.
  • the inner surface of the exterior body 12F, 12B is applied to the back surface of the interior body 200, that is, the back surface of the liquid-impermeable sheet 11 in this case and the hot melt adhesive applied to the root portion 65 of the rising gather 60. Is fixed.
  • the inner / outer joint part 201 that fixes the inner body 200 and the outer bodies 12F and 12B can be provided in almost the entire region where both overlap, for example, the inner body 200 may be provided in a portion excluding both ends in the width direction. it can.
  • the interior body 200 can take any shape, but is rectangular in the illustrated form. As shown in FIGS. 3 to 5, the interior body 200 includes a top sheet 30 on the body side, a liquid-impermeable sheet 11, and an absorbent element 50 interposed therebetween. Yes, it is the main body that takes up the absorption function.
  • Reference numeral 40 denotes an intermediate sheet (second sheet) provided between the top sheet 30 and the absorbent element 50 in order to quickly transfer the liquid that has passed through the top sheet 30 to the absorbent element 50. Shows a rising gather 60 that extends from both sides of the interior body 200 so as to contact the legs of the wearer in order to prevent excrement from leaking to both sides of the interior body 200.
  • the top sheet 30 has a property of allowing liquid to pass through, and examples thereof include a porous or non-porous nonwoven fabric, a porous plastic sheet, and the like.
  • the nonwoven fabric is not particularly limited as to what the raw fiber is.
  • synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of them. Etc. can be illustrated.
  • the nonwoven fabric may be manufactured by any processing.
  • processing method examples include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method.
  • spunlace method a spunlace method
  • thermal bond method a melt blown method
  • melt blown method a melt blown method
  • needle punch method an air through method
  • point bond method a point bond method.
  • the spunbond method and spunlace method are preferable.
  • the air-through method, point bond method, and thermal bond method are preferable processing methods. .
  • the top sheet 30 may be composed of one sheet or may be composed of a laminated sheet obtained by bonding two or more sheets. Similarly, the top sheet 30 may be composed of one sheet or two or more sheets in the planar direction.
  • the both sides of the top sheet 30 may be folded back to the back side at the side edge of the absorbent element 50, or may be projected to the side from the side edge of the absorbent element 50 without being folded back.
  • the top sheet 30 may be fixed to a member adjacent to the back side by a joining means by material welding such as heat sealing or ultrasonic sealing, or a hot melt adhesive for the purpose of preventing positional deviation with respect to the back side member. desirable.
  • the top sheet 30 is fixed to the surface of the intermediate sheet 40 and the surface of the packaging sheet 58 located on the front side of the absorber 56 by a hot melt adhesive applied to the back surface thereof.
  • An intermediate sheet (also referred to as “second sheet”) 40 having a higher liquid permeation rate than the top sheet 30 can be provided in order to quickly transfer the liquid that has permeated through the top sheet 30 to the absorber.
  • This intermediate sheet 40 not only improves the absorption performance by the absorbent by quickly transferring the liquid to the absorbent body, but also prevents the “reversed” phenomenon of the absorbed liquid from the absorbent body, so that the top sheet 30 is always dried. It can be made into the state which carried out.
  • the intermediate sheet 40 can be omitted.
  • the intermediate sheet 40 examples include the same material as the top sheet 30, spunlace nonwoven fabric, spunbond nonwoven fabric, SMS nonwoven fabric, pulp nonwoven fabric, mixed sheet of pulp and rayon, point bond nonwoven fabric, or crepe paper.
  • an air-through nonwoven fabric is preferable because it is bulky.
  • the resin used for the core may be polypropylene (PP), but polyester (PET) having high rigidity is preferable.
  • Basis weight is preferably 20 ⁇ 80g / m 2, more preferably 25 ⁇ 60g / m 2.
  • the thickness of the raw fiber of the nonwoven fabric is preferably 2.0 to 10 dtex.
  • the intermediate sheet 40 in the illustrated form is arranged in the center shorter than the width of the absorbent body 56, but may be provided over the entire width.
  • the length in the longitudinal direction of the intermediate sheet 40 may be the same as the entire length of the diaper, may be the same as the length of the absorbent element 50, or may be within a short length range centered on the region that receives the liquid.
  • the intermediate sheet 40 may be fixed to a member adjacent to the back side by a bonding means by material welding such as heat sealing or ultrasonic sealing, or a hot melt adhesive for the purpose of preventing positional displacement with respect to the back side member. desirable.
  • the intermediate sheet 40 is fixed to the surface of the portion of the packaging sheet 58 located on the front side of the absorbent body 56 with a hot melt adhesive applied to the back surface thereof.
  • the material of the liquid-impermeable sheet 11 is not particularly limited.
  • a plastic film made of an olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric provided with a plastic film on the surface of the nonwoven fabric, or a plastic film For example, a laminated sheet in which a nonwoven fabric or the like is laminated and bonded to each other can be exemplified.
  • the liquid-impermeable sheet 11 is preferably made of a liquid-impermeable and moisture-permeable material that is preferably used from the viewpoint of preventing stuffiness.
  • a microporous plastic film obtained by kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene, forming a sheet, and then stretching in a uniaxial or biaxial direction.
  • an olefin resin such as polyethylene or polypropylene
  • non-woven fabric using microdenier fibers leakproof reinforcement by reducing the voids of the fibers by applying heat or pressure, and methods such as coating with a superabsorbent resin or hydrophobic resin or water repellent
  • a sheet that is liquid-impermeable without using a plastic film can also be used as the liquid-impermeable sheet 11.
  • the liquid-impermeable sheet 11 has a width that can be accommodated on the back side of the absorbent element 50 as shown in the drawing, and in order to improve leakage prevention, the liquid-impermeable sheet 11 wraps around both sides of the absorbent element 50 so that the side of the top sheet 30 of the absorbent element 50 It can also extend to both sides.
  • the width of this extended portion is suitably about 5 to 20 mm on the left and right.
  • the rising gather 60 is for preventing side leakage, extends across the entire front-rear direction LD along both side portions of the interior body 200, and stands up from the side of the interior body 200 to the front side.
  • the rising gather 60 in the illustrated example is such that the base side portion rises obliquely toward the center in the width direction, and the tip side portion rises obliquely outward in the width direction from the intermediate portion, but is not limited thereto. However, it is possible to make appropriate changes such as a configuration in which the whole stands up in the center in the width direction.
  • the rising gather 60 in the illustrated example folds the belt-shaped gathered nonwoven fabric 62 having a length equal to the length in the front-rear direction of the interior body 200 in the width direction WD at the tip portion and folded in two.
  • a plurality of elongated gather elastic members 63 are fixed along the longitudinal direction and spaced apart in the width direction WD between the folded portion and the sheet in the vicinity thereof.
  • the base end portion (the end portion on the side opposite to the sheet folding portion in the width direction WD) of the rising gather 60 opposite to the front end portion is fixed to the side portion on the back side of the liquid-impermeable sheet 11 in the interior body 200.
  • a portion 65 other than the root portion 65 is a main body portion 66 (a portion on the folded portion side) extending from the root portion 65.
  • the main body portion 66 includes a root side portion extending toward the center in the width direction and a tip side portion that is folded back at the tip of the root side portion and extends outward in the width direction.
  • This form is a surface contact type rising gather 60, but a line contact type rising gather 60 that is not folded outward in the width direction can also be used.
  • the both ends of the front-back direction among the main body parts 66 are set to the fall-down part 67 fixed with respect to the side part surface of the top sheet 30 in a lying state, the front-back direction intermediate part located between these is not fixed.
  • the gather elastic member 63 along the front-rear direction LD is fixed in an extended state to at least the tip of the free portion 68.
  • the contraction force of the gather elastic member 63 acts so as to bring the both ends in the front-rear direction closer, but the both ends of the main body portion 66 are fixed so as not to stand up.
  • the free portion 68 stands up so as to abut on the body side as indicated by an arrow in FIG.
  • the free portion 68 stands up so as to open outward in the width direction at and around the crotch portion, so that the rising gather 60 abuts on the surface around the legs.
  • the fit is improved.
  • the absorption element 50 is not specifically limited, In this example, it has the absorber 56 and the packaging sheet 58 which wraps this absorber 56 whole.
  • the packaging sheet 58 can be omitted.
  • the absorber 56 can be formed of an aggregate of fibers.
  • a filament assembly obtained by opening, as necessary, synthetic fiber tows (fiber bundles) such as cellulose acetate as well as short fibers such as cotton-like pulp and synthetic fibers Can also be used. It is preferable to disperse and hold superabsorbent polymer particles in the absorber 56.
  • the absorber 56 may be rectangular, but as shown in FIG. 7, the absorber 56 includes a front end portion, a rear end portion, and a constricted portion 56 ⁇ / b> N that is located between these and narrower than the front end portion and the rear end portion.
  • the hourglass shape is preferred because the fit of the absorber 56 and the rising gather 60 around the legs is improved.
  • the size of the absorbent body 56 can be appropriately determined as long as it extends to the front, rear, left, and right of the urination port position, but preferably extends to the peripheral portion of the interior body 200 or the vicinity thereof in the front-rear direction LD and the width direction WD.
  • Reference numeral 56X indicates the width of the absorber 56.
  • the absorber 56 can contain superabsorbent polymer particles in a part or all thereof.
  • Superabsorbent polymer particles include “powder” in addition to “particles”.
  • the superabsorbent polymer particles 54 those used in this type of disposable diaper can be used as they are.
  • the material of the superabsorbent polymer particles can be used without any particular limitation, but those having a water absorption of 40 g / g or more are suitable.
  • Superabsorbent polymer particles include starch, cellulose and synthetic polymers, such as starch-acrylic acid (salt) graft copolymer, saponified starch-acrylonitrile copolymer, and sodium carboxymethylcellulose cross-link. Or an acrylic acid (salt) polymer can be used.
  • As the shape of the superabsorbent polymer particles a commonly used granular material is suitable, but other shapes can also be used.
  • the superabsorbent polymer particles those having a water absorption rate of 70 seconds or less, particularly 40 seconds or less are preferably used. If the water absorption speed is too slow, the liquid supplied into the absorber 56 is likely to cause a so-called reverse return that returns to the outside of the absorber 56.
  • the superabsorbent polymer particles those having a gel strength of 1000 Pa or more are preferably used. Thereby, even if it is a case where it is set as the bulky absorber 56, the sticky feeling after liquid absorption can be suppressed effectively.
  • the basis weight of the superabsorbent polymer particles can be appropriately determined according to the amount of absorption required for the use of the absorber 56. Therefore, although it cannot be generally stated, it can be 50 to 350 g / m 2 .
  • tissue paper particularly crepe paper, non-woven fabric, polylaminated non-woven fabric, a sheet with small holes, or the like can be used.
  • the superabsorbent polymer particles be a sheet that does not escape.
  • a nonwoven fabric is used in place of the crepe paper, a hydrophilic SMS nonwoven fabric (SMS, SSMMS, etc.) is particularly suitable, and the material can be polypropylene, polyethylene / polypropylene composite material, or the like.
  • the basis weight is preferably 5 to 40 g / m 2 , particularly 10 to 30 g / m 2 .
  • the packaging form of the packaging sheet 58 can be determined as appropriate, but from the viewpoint of ease of manufacture and prevention of leakage of the superabsorbent polymer particles from the front and rear end edges, the cylinder is formed so as to surround the front and back surfaces and both side surfaces of the absorbent body 56. It is preferable that the front and rear edge portions protrude from the front and rear of the absorbent body 56, and the overlapping portion and the overlapping portion of the front and rear protruding portions are joined by a joining means such as hot melt adhesive or material welding.
  • the exterior bodies 12F and 12B include a front exterior body 12F that is a part constituting the front body F and a rear exterior body 12B that is a part constituting the rear body B.
  • the front exterior body 12F and the rear exterior body 12B Are not continuous on the crotch side and are spaced apart in the front-rear direction LD (exterior two-split type).
  • This separation distance 12d can be, for example, about 40 to 60% of the total length Y.
  • the exterior body 12 can also be made into the integral thing which continues between crotches from the front body F to the back body B (exterior integral type).
  • the liquid-impermeable sheet 11 is not exposed on the back surface of the interior body 200.
  • the cover nonwoven fabric 20 covering the back surface of the interior body 200 is preferably provided between the front exterior body 12F and the interior body 200 and between the rear exterior body 12B and the interior body 200.
  • the material of the cover nonwoven fabric 20 is not particularly limited.
  • the same material as the outer nonwoven fabric layer 12S or the inner nonwoven fabric layer 12H of the outer package 12 (a porous nonwoven fabric layer or a nonporous nonwoven fabric layer described later) may be used. .
  • the front-rear direction range of the cover nonwoven fabric 20 is not particularly limited as long as it has portions overlapping the front exterior body 12F and the rear exterior body 12B, and extends in the front-rear direction LD over the entire front end to rear end of the interior body 200. As shown in FIG. 7, the intermediate position in the front-rear direction of the region where the rear exterior body 12B and the interior body 200 overlap from the front-rear direction intermediate position of the region where the front exterior body 12F and the interior body 200 overlap. It may extend in the front-rear direction LD.
  • the exterior bodies 12F and 12B have a waistline portion that is a front-rear direction range corresponding to the waistline region T.
  • the front exterior body 12F does not have a portion corresponding to the intermediate region L, but the rear exterior body 12B has a collar cover portion C that extends from the waist region T to the intermediate region L side. is doing.
  • the front exterior body 12F is also provided with a collar cover portion that extends from the waistline region T toward the intermediate region L, a configuration that does not provide a collar cover portion while providing a groin cover portion, and the front exterior body 12F and It is not necessary to provide a portion corresponding to the intermediate region L in both of the rear exterior bodies 12B.
  • the lower edge of the collar cover portion C is formed in a straight line shape along the width direction WD, similarly to the lower edge of the front exterior body 12F. It can also be a curve that becomes.
  • the exterior bodies 12F and 12B are formed with the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H.
  • the nonwoven fabric layer 12H is formed by folding one sheet material so that the crease is positioned on the waist opening side, and bonding two sheet materials together as shown in FIG. It can also be formed.
  • the innermost portion 12r of these sheet materials can be extended to the end of the interior body 200 on the waist opening WO side (see the example in FIG. 9).
  • at least one of the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H may be formed of a sheet material that is partially different from the other portions.
  • constituent fibers of the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H for example, synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides (including single-component fibers and composite fibers such as core sheaths)
  • synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters, and polyamides (including single-component fibers and composite fibers such as core sheaths)
  • regenerated fibers such as rayon and cupra, natural fibers such as cotton, and the like can be selected without particular limitation, and these can also be used as a mixture.
  • the constituent fibers are crimped fibers.
  • the constituent fibers of the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H may be hydrophilic fibers (including hydrophobic fibers made hydrophilic by a hydrophilizing agent) or hydrophobic fibers or water repellent fibers (water repellent fibers). (Including water-repellent fibers made water-repellent by an agent).
  • Nonwoven fabrics are generally short fiber nonwoven fabrics, long fiber nonwoven fabrics, spunbond nonwoven fabrics, meltblown nonwoven fabrics, spunlace nonwoven fabrics, thermal bond (air-through) nonwoven fabrics, needle punches, depending on fiber length, sheet formation method, fiber bonding method, and laminated structure. It is classified as non-woven fabric, point bond non-woven fabric, laminated non-woven fabric (SMS non-woven fabric with a melt-blown layer sandwiched between spunbond layers, SMMS non-woven fabric, etc.). Can do.
  • the fineness and basis weight of the constituent fibers of the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H can be determined as appropriate, but in the normal case, they are preferably about 1.8 to 6.0 dtex and about 10 to 30 g / m 2 , respectively.
  • At least one of the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H is a perforated nonwoven fabric in which holes 14 penetrating in the thickness direction are scattered.
  • the inner nonwoven fabric layer 12H on the skin side of the wearer is a non-porous nonwoven fabric and the outer nonwoven fabric layer 12S is a porous nonwoven fabric, the influence on the touch of the holes 14 is eliminated. Can do.
  • the hole 14 is provided in only one of the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H, the skin is not exposed at the time of wearing, and leakage through the hole 14 can be prevented.
  • the inner nonwoven fabric layer 12H on the skin side of the wearer may be a perforated nonwoven fabric
  • the outer nonwoven fabric layer 12S may be a nonporous nonwoven fabric.
  • both the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are perforated nonwoven fabrics, and the hole 14 of one perforated nonwoven fabric and the hole 14 of the other perforated nonwoven fabric do not overlap.
  • a structure is also preferable. In this case, higher air permeability can be obtained by making both the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H porous.
  • both the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are perforated nonwoven fabrics, and the holes 14 of one perforated nonwoven fabric and the holes 14 of the other perforated nonwoven fabric are completely or partially. May overlap.
  • both the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are perforated nonwoven fabrics, in most cases (for example, an area of 50% or more), the holes 14 of one perforated nonwoven fabric and the other perforated nonwoven fabric are formed.
  • the hole 14 of the porous nonwoven fabric does not overlap, in some cases, the hole 14 of one porous nonwoven fabric and the hole 14 of the other porous nonwoven fabric may overlap.
  • each hole 14 has a long hole shape as shown in FIG. 10B, a true circle shape as shown in FIGS. 10E and 10F, an elliptic shape as shown in FIGS. 10A and 10D, Any shape such as a polygon such as a triangle, a rectangle, and a rhombus, a star, and a cloud can be used.
  • FIG. 10 (c) holes having different shapes may be mixed, but in that case, it is preferable that the dimensions in the expansion / contraction direction are substantially the same, and that all the holes have a single shape. preferable.
  • each hole 14 is not particularly limited, but the dimension 14L in the orthogonal direction XD (the dimension of the longest part) is preferably 0.3 to 5.0 mm, particularly preferably 0.6 to 2.0 mm.
  • the ED dimension (longest part dimension) 14W is preferably 0.3 to 3.0 mm, particularly preferably 0.4 to 1.5 mm.
  • shape of the hole 14 is a long shape in one direction such as a long hole shape, an ellipse shape, a rectangular shape, a rhombus shape, etc.
  • the dimension in the longitudinal direction is preferably 1.2 to 2.5 times the dimension (longest dimension) in the direction perpendicular thereto.
  • the longitudinal direction of the hole 14 is preferably the front-rear direction LD, but may be the width direction WD or an oblique direction.
  • each hole 14 may be determined as appropriate, but the area is preferably about 0.1 to 2.7 mm 2 (particularly 0.1 to 1.0 mm 2 ). It is preferably about 0 to 15.0% (particularly 5.0 to 10.0%).
  • the planar arrangement of the holes 14 can be appropriately determined as long as the rows of the holes 14 arranged at intervals in the direction orthogonal to the expansion / contraction direction ED are arranged at intervals in the expansion / contraction direction ED.
  • the holes 14 are arranged in such a manner that the rows of holes 14 linearly arranged at a predetermined interval in the orthogonal direction XD have a predetermined interval in the expansion / contraction direction ED. It is preferable that the matrix is repeated. In this case, as shown in FIG.
  • the rows of the holes 14 linearly arranged at a predetermined interval in the orthogonal direction XD are spaced from each other in the expansion / contraction direction ED so that the positions in the orthogonal direction XD are shifted. It can be arranged in a line.
  • the example shown in FIG. 10B is a so-called zigzag (hexagonal lattice) arrangement in which the holes 14 are alternately arranged in the row of adjacent holes 14.
  • FIG. 10 (f) as long as there is a portion where the row of adjacent holes 14 is continuous in the orthogonal direction XD, the holes 14 are arranged in a wavy shape having a center line along the orthogonal direction.
  • the row of holes 14 arranged in the direction orthogonal to the expansion / contraction direction ED is included in the line of the holes 14 arranged at intervals in the expansion / contraction direction ED.
  • the orthogonal direction interval 14y and the expansion / contraction direction interval 14x of the holes 14 may be constant or may vary.
  • the orthogonal interval 14y and the expansion / contraction interval 14x of the holes 14 can be determined as appropriate, but considering air permeability, 14y is 0.9 to 8.0 mm, 14x is 2.0 to 10 mm, and particularly 14y is 1. Desirably, 0 to 3.0 mm and 14x are within a range of 3.0 to 5.0 mm.
  • the cross-sectional shape of the hole 14 is not particularly limited.
  • the hole 14 may be a punching type hole whose periphery is formed by a cut end of a fiber as shown in FIG. 16 (d).
  • 14 may be a non-punched hole 14 (the edge has a high fiber density) formed by having almost no cut ends of the fiber at the periphery of 14 and a pin inserted between the fibers and spread.
  • the punching type hole may be smaller as the diameter of the hole 14 goes to the middle in the thickness direction, or smaller as it goes to the one side in the thickness direction. .
  • the non-punched hole 14 is such that the diameter of the hole 14 decreases from the pin insertion side toward the opposite side. This includes a case where the diameter of the hole 14 continues to decrease over the entire thickness direction of the nonwoven fabric layer, and a case where the decrease in the diameter of the hole 14 almost disappears in the middle of the thickness direction.
  • a fiber is pushed out to the edge of the hole 14 on the side opposite to the pin insertion side and pushed out to the side opposite to the pin insertion side.
  • the part (burr) 14e is formed, and the protrusion 14e is not formed on the pin insertion side, and the fiber is inserted into the edge of the hole 14 on the side opposite to the pin insertion side as shown in FIG.
  • the protrusion 14e pushed out to the opposite side is formed, and the pin insertion side includes the protrusion 14e formed by pushing out the fiber to the pin insertion side.
  • the protrusion 14 e has a substantially uniform height 14 h as shown in FIG. 16A, and the protrusion 14 e as shown in FIG.
  • the protruding portion 14e has a cylindrical shape continuously in the circumferential direction of the hole, the protruding portion 14e of a part or all of the holes 14 is formed only in a part of the circumferential direction of the hole 14. Also good.
  • the projecting heights 14h, 14i, and 14j (apparent height when no pressure is measured using an optical microscope) is preferably about 0.2 to 1.2 mm.
  • the highest protrusion height 14i in the protrusion 14e is preferably about 1.1 to 1.4 times the lowest protrusion height 14j.
  • the protruding height of the protruding portion 14 e may change in the circumferential direction of the hole 14.
  • a protruding portion (burr) 14e is formed in which the protruding height i of the opposing portion in the longitudinal direction of the hole 14 is higher than the protruding height j of the opposing portion in the direction orthogonal to the longitudinal direction.
  • the protruding portion 14e of the hole 14 may have a fiber density that is lower than that of the surrounding portion, but is preferably the same or higher.
  • the fineness, basis weight and thickness of the constituent fibers of the perforated nonwoven fabric can be determined as appropriate, but in the usual case, about 1.8 to 6.0 dtex, about 15 to 25 g / m 2 and about 0.1 to 1.3 mm, respectively. Is preferable.
  • the bending resistance in the MD direction (width direction) of the perforated nonwoven fabric is preferably 35 to 100 mm, particularly 40 to 70 mm in a non-porous state before drilling, and 10 to 50 mm in the state after drilling.
  • the thickness is preferably 15 to 40 mm.
  • an elongated elastic member 19 is provided between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H, and an expansion / contraction region A2 is formed that elastically expands and contracts in the width direction WD as the elastic member 19 expands and contracts. ing. That is, in the stretchable region A2, in the natural length state, the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are contracted with the contraction of the elastic member and have a large number of wrinkles 80. Further, when the stretchable region A2 is extended in the width direction WD, the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are extended to a predetermined extension rate that can be extended without wrinkles 80.
  • the elastic member 19 can be used in any shape, e.g., a thread shape, a string shape, and a belt shape, as long as it is elongated.
  • the elastic member 19 may be made of synthetic rubber or natural rubber.
  • the elastic member 19 is fixed to the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H at least at both ends in the stretching direction ED in the stretchable region A2.
  • the fixing means for the elastic member 19 is not particularly limited, but it is preferable to use the hot melt adhesive 19H.
  • the hot melt adhesive 19H is intermittently applied to the outer peripheral surfaces of both ends of the elastic member 19 in the expansion / contraction direction ED by an application means such as a comb gun or a sure wrap nozzle, the elastic member 19 can be sandwiched between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H.
  • the elastic member 19 is fixed to the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H via the hot melt adhesive 19H only at both ends in the stretching direction ED in the stretchable region.
  • the elastic member 19 is applied to the outer nonwoven fabric layer 12S and the inner side. It can also be sandwiched between the nonwoven fabric layers 12H.
  • the elastic member 19 is fixed to the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H in the longitudinal direction as well as both ends of the stretching direction ED in the stretchable region A2 at the arrangement site.
  • the hot melt adhesive may be continuous in the orthogonal direction XD or may be intermittently disposed in the orthogonal direction XD. Further, in these cases, the continuous portion of the hot melt adhesive may extend over a plurality of elastic members.
  • the elastic member 19 that is, the stretchable region at the following site. That is, a plurality of waist elastic members 17 are spaced in the front-rear direction so as to be continuous over the entire width direction WD between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H in the waist portion W of the exterior bodies 12F and 12B. Attached. Moreover, about the 1 or several arrange
  • the waist elastic member 17 has a thickness of 155 to 1880 dtex, particularly about 470 to 1240 dtex (in the case of synthetic rubber.
  • the cross-sectional area is 0.05 to 1.5 mm 2 , particularly 0.1 to 1.
  • the rubber thread 0mm about 2), 4 is preferably provided about 3 to 22 present at intervals of ⁇ 12 mm, which by extension ratio in the width direction WD of the waist portion W 150 to 400% especially about 220-320% Preferably there is.
  • the waist portion W does not need to use the same thickness waist portion elastic member 17 in all of the front-rear direction LD or have the same elongation rate. The thickness and elongation rate may be different.
  • a plurality of waist lower part elastic members 15 made of an elongated elastic member are attached at intervals in the front-rear direction between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H in the waist lower part U of the exterior bodies 12F and 12B. It has been.
  • the waist lower elastic member 15 has a thickness of 155 to 1880 dtex, especially about 470 to 1240 dtex (in the case of synthetic rubber.
  • the cross-sectional area is 0.05 to 1.5 mm 2 , particularly 0.1 to 1.
  • the rubber thread 0mm about 2), 1 ⁇ 15mm, especially 3 to is preferably provided about 5 to 30 yarns at intervals of 8 mm, which by 200 to 350% elongation modulus in the width direction WD of the waist lower portion U, especially It is preferably about 240 to 300%.
  • cover elastic members 16 made of an elongated elastic member are attached at intervals in the front-rear direction between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H in the buttock cover portion C of the rear exterior body 12B. ing.
  • the cover elastic member 16 has a thickness of 155 to 1880 dtex, especially about 470 to 1240 dtex (in the case of synthetic rubber.
  • the cross-sectional area is 0.05 to 1.5 mm 2 , particularly 0.1 to 1.0 mm. It is preferable to provide about 2 to 10 thread rubbers with an interval of 5 to 40 mm, particularly 5 to 20 mm, and the extension ratio of the cover portion in the width direction WD is 150 to 300%, particularly 180 to 260. % Is preferred.
  • a cover portion elastic member When providing an inguinal cover portion on the front exterior body 12F, a cover portion elastic member can be similarly provided.
  • Non-stretchable area When the elastic members 15 and 16 are provided in the front-rear direction range having the absorber 56 like the lower waist portion U and the buttock cover portion C in the illustrated example, a part or all of the elastic members 15 and 16 in the width direction WD of the absorber 56.
  • the intermediate in the width direction preferably including the entire inner / outer joint portion 201 including part or all of the portion overlapping the absorber 56 and the width direction WD is defined as the non-stretchable region A1, and the width direction Both sides are taken as the stretchable area A2.
  • the waist portion W is preferably the stretchable region A2 over the entire width direction WD, but similarly to the waist lower portion U, a non-stretchable region A1 may be provided in the middle in the width direction.
  • the stretchable region A2 and the non-stretchable region A1 supply the elastic members 15 and 16 between the inner nonwoven fabric layer 12H and the outer nonwoven fabric layer 12S, and the elastic members 15 and 16 are at least both ends in the stretchable direction ED in the stretchable region A2.
  • the elastic members 15 and 16 are pressed and applied at one place in the middle of the width direction in the region that becomes the non-stretchable region A1. It can be constructed by cutting by heating, or by cutting almost the entire elastic members 15 and 16 finely by pressurization and heating, leaving the stretchability in the stretchable region A2 and killing the stretchability in the non-stretchable region A1. . In the former case, as shown in FIG.
  • the non-stretchable region A1 has an outer nonwoven fabric in a state in which the uncut stretched region A2 is continuously cut from the elastic members 15 and 16 of the stretchable region A2 to the natural length alone as the unnecessary elastic member 18. In the latter case, it remains between the layer 12S and the inner nonwoven fabric layer 12H.
  • the cut residue continuous from the elastic members 15 and 16 in the elastic region A2 and the elastic members 15 and 16 in both elastic regions A2 are continuous.
  • the cut piece of the elastic member that is not left is left between the outer nonwoven fabric layer 12 ⁇ / b> S and the inner nonwoven fabric layer 12 ⁇ / b> H in a state where the cut piece of the elastic member is contracted to the natural length alone as an unnecessary elastic member.
  • the stretchable region A2 has a sheet joining portion 70 to which the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are joined, and the sheet joining portions 70 are spaced in the orthogonal direction XD. And a striped pattern substantially continuous in the expansion / contraction direction ED.
  • seat junction part 70 is formed at intervals in the orthogonal
  • the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are integrated in each sheet joining portion 70, so that the wrinkles 80 are formed in a wave shape along each other.
  • the shape of the outer nonwoven fabric layer 12 ⁇ / b> S and the inner nonwoven fabric layer 12 ⁇ / b> H in the sheet bonding portions 70 is generally shown in FIG.
  • the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H are wavy so that they are along each other, and ridges 80 are formed on both front and back surfaces.
  • the sheet bonding portion 70 may be continuous over the entire expansion / contraction direction ED of the expansion / contraction region A2, but may be continuous only in a part of the range where the plurality of ridges 80 are formed.
  • the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H can be freely deformed in the region between the adjacent sheet bonding portions 70.
  • a portion having the holes 14 is weak and easily bent when deformed independently. Therefore, unlike the illustrated example, at least one of the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H is a perforated nonwoven fabric, and there is a hole 14 in one region across the sheet joining portion 70, but in the other region.
  • a ridge 80 is formed in one region so that the hole 14 becomes a fold, whereas the other region does not align with the ridge 80 (does not follow the orthogonal direction XD). 80 is formed. That is, the ridges 80 are branched or the valleys are partially widened, and the ridges 80 that are arranged as a whole are hardly formed.
  • the array of holes 14 is arranged such that the rows of holes 14 arranged at intervals in the orthogonal direction XD are arranged at intervals in the expansion / contraction direction ED. Further, the interval 14 y in the orthogonal direction XD of the holes 14 in the row of the holes 14 is narrower than the interval 70 y in the orthogonal direction XD of the sheet bonding portion 70.
  • the sheet A continuous ridge 80 in which the hole 14 becomes a crease is easily formed over the entire region delimited by the joint portion 70. That is, it is difficult for the ridges 80 to branch or the valleys to be partially widened, and as a whole, the well-formed ridges 80 extending along the rows of the holes 14 are easily formed.
  • the interval 14y in the orthogonal direction XD of the holes 14 in the row of holes 14 is not particularly limited as long as it is shorter than the interval 70y in the orthogonal direction XD of the sheet bonding portion 70.
  • the interval 14 y in the orthogonal direction XD of the holes 14 in the row of holes 14 is 1/6 or more and less than 1/2 of the interval 70 y in the orthogonal direction XD of the sheet bonding portions 70, it is between the adjacent sheet bonding portions 70. Since two or more holes 14 exist in all of the regions, a series of ridges 80 in which the holes 14 are broken are more easily formed. Therefore, it becomes easy to form the collar 80 further arranged. In the example shown in FIG.
  • the interval 14 y in the orthogonal direction XD of the holes 14 in the row of the holes 14 is longer than the interval in the orthogonal direction XD of the waist elastic member 19. If the hot melt adhesive 19 ⁇ / b> H arranged at the portion overlapping the elastic member 19 does not satisfy the above condition, the above condition is satisfied except for the waist portion W.
  • the sheet bonding portion 70 is not particularly limited as long as it is formed in a striped pattern that is spaced in the orthogonal direction XD and substantially continuous in the expansion / contraction direction ED.
  • the sheet joining portion 70 may be formed only by the hot melt adhesive 19 ⁇ / b> H disposed in a portion overlapping the elastic member 19.
  • Such a sheet joint portion 70 can be manufactured by sandwiching the elastic member 19 coated with the hot melt adhesive 19H between the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H, and is widely used in the field of disposable wearing articles. It is used.
  • the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H contract together with the elastic member 19 at the sheet bonding portion 70, and the fiber structure becomes dense. Therefore, as shown in FIG. 18, the ridge 80 is easily divided at the sheet joining portion 70 in principle.
  • the arrangement of the holes 14 and the arrangement relationship between the holes 14 and the sheet bonding portion 70 are employed, the influence of the holes 14 is dominant on the formation of the flange 80. In spite of the fact that 80 is likely to be divided, as a whole, it is easy to form a well-provided ridge 80 extending along the row of holes 14.
  • a stretch direction is formed in a region located between the elastic members 19 adjacent to each other in the orthogonal direction XD. It is also possible to form a sheet joint 70 that is substantially continuous with the ED. In the latter case, the sheet joining portion 70 may be formed by material welding such as heat sealing or ultrasonic sealing in addition to the hot melt adhesive.
  • the hot melt adhesive 19H for fixing both ends of the elastic member 19 may join the outer nonwoven fabric layer 12S and the inner nonwoven fabric layer 12H.
  • the dimension 70L of the sheet bonding portion 70 in the orthogonal direction XD can be determined as appropriate, but is preferably short, and is preferably 0.2 to 0.6 times the space 19y between adjacent elastic members 19 in the orthogonal direction XD, particularly 0.3. It is preferable that the ratio is 0.5 times.
  • the cross-sectional structure of the hole 14 is not particularly limited, but the diameter of the hole 14 is the non-woven fabric layer side facing from the opposite side of the facing non-woven fabric layer side (for example, in the example shown in FIGS. 11 and 12). If it becomes smaller as it goes from the outer side of the outer nonwoven fabric layer 12S to the inner side), it is easy to bend so that the opposite surface of the nonwoven fabric layer is valley-folded, as in the example shown in FIGS. Therefore, the cocoon 80 becomes more beautifully arranged.
  • the ridge 80 formed in this case the row of holes 14 is positioned at the bottom between the ridges, and as shown in FIG. The hole 14 is exposed as shown in FIG.
  • the sheet bonding portions 70 may be arranged so as to pass through the holes 14, but in that case, if the sheet bonding portions 70 are formed by the hot melt adhesive 19 ⁇ / b> H, the hot bonding from the holes 14 may be performed. The melt adhesive 19H is exposed. However, when the row of holes 14 is located at the bottom between the ridges, there is an advantage that the hot melt adhesive 19H exposed from the holes 14 is difficult to touch the skin.
  • the diameter of the holes 14 of the porous nonwoven fabric is opposite to the opposing nonwoven fabric layer side.
  • the wrinkle 80 formed in the inner side nonwoven fabric layer 12H turns into a thin wrinkle, and an outer side nonwoven fabric layer
  • the ridges 80 formed in 12S are thick folds that bend gently.
  • the contact area between the inner nonwoven fabric layer 12H and the skin is small, and the gap between the heel and the heel increases, so that the air permeability is particularly excellent.
  • the ridges 80 of the outer nonwoven fabric layer 12S are less likely to be deformed to impair the beauty such as falling down, and have excellent shape stability.
  • the arrangement of the holes 14 is not limited, but affects the shape of the eaves 80. Therefore, when the rows of the holes 14 linearly arranged at a predetermined interval in the orthogonal direction XD are in a matrix shape that repeats at a predetermined interval in the expansion / contraction direction ED, in particular, the ridge 80 extends linearly along the orthogonal direction XD. It is preferable because it tends to be neatly arranged.
  • seat junction part 70 can be determined suitably, it is especially preferable in it being in the following ranges.
  • Dimension 14W of expansion / contraction direction ED of hole 14 0.3 to 3.0 mm (particularly 0.4 to 1.5 mm)
  • Dimension 14L in the orthogonal direction XD of the hole 14 0.3 to 5.0 mm (especially 0.6 to 2.0 mm)
  • Interval 14y in the orthogonal direction XD of the holes 14 in the row 1.0 to 5.0 mm (especially 1.0 to 3.0 mm)
  • Spacing between sheet joints 70 in the orthogonal direction XD 5 to 10 mm (especially 5.0 to 7.0 mm)
  • Dimension 70L of sheet joint 70 in orthogonal direction XD 0.5 to 5.0 mm (especially 1.0 to 3.0 mm)
  • seat junction part 70 can also be provided only in the expansion-contraction area
  • Front-rear direction means the direction (vertical direction) indicated by LD in the figure
  • width direction means the direction indicated by WD (left-right direction) in the figure
  • front-rear direction and the width direction are It is orthogonal.
  • -"MD direction” and “CD direction” mean the flow direction (MD direction) in production equipment and the transverse direction (CD direction) perpendicular thereto, and either one is the front-rear direction, and the other Is the width direction.
  • the MD direction of the nonwoven fabric is the direction of fiber orientation of the nonwoven fabric.
  • the fiber orientation is the direction along which the fibers of the nonwoven fabric are aligned. For example, the fiber orientation can be determined from the measurement method according to the TAPPI standard method T481, the fiber orientation test method using the zero-range tensile strength, It can be discriminated by a simple measuring method for determining the orientation direction.
  • Center for a closed planar shape means the center of gravity in the case of a figure that does not have a center.
  • -“Area ratio” means the ratio of the target portion to the unit area, and is expressed as a percentage by dividing the total area of the target portion (for example, holes) in the target region (for example, non-woven fabric) by the area of the target region. is there.
  • the target region In a form in which a large number of target portions are provided at intervals, it is desirable to set the target region to a size that includes 10 or more target portions and obtain the area ratio.
  • the area ratio of the holes can be measured by the following procedure using, for example, a trade name VHX-1000 of KEYENCE Corporation, with the measurement condition set to 20 times. (1) Set on a 20x lens and adjust the focus. The position of the nonwoven fabric is adjusted so that the holes are 4 ⁇ 6.
  • Elongation rate means a value when the natural length is 100%.
  • an expansion rate of 200% is synonymous with an expansion ratio of 2 times.
  • ⁇ “Weighing” is measured as follows. After the sample or test piece has been pre-dried, it is left in a test room or apparatus in a standard state (test location is temperature 23 ⁇ 1 ° C., relative humidity 50 ⁇ 2%) to a constant weight. Pre-drying refers to making a sample or test piece constant in an environment at a temperature of 100 ° C. In addition, it is not necessary to perform preliminary drying about the fiber whose official moisture content is 0.0%. From the test piece in a constant weight state, a sample plate (100 mm ⁇ 100 mm) is used to cut a sample having a size of 100 mm ⁇ 100 mm. The weight of the sample is measured, multiplied by 100, and the weight per square meter is calculated and used as the basis weight.
  • Thickness is automatically measured using an automatic thickness measuring instrument (KES-G5 handy compression measurement program) under the conditions of load: 0.098 N / cm 2 and pressure area: 2 cm 2 .
  • “Bending softness” means “8.21.1 A method (45 ° cantilever method)” of JIS L 1096: 2010 “Fabric and knitted fabric testing method”.
  • the value of the porous nonwoven fabric before punching is the same as the non-porous nonwoven fabric (fiber composition, fineness, basis weight, thickness, etc.).
  • the water absorption rate is the "time to end point" when JIS K7224-1996 "Water absorption rate test method for superabsorbent resin" is performed using 2 g of superabsorbent polymer and 50 g of physiological saline. .
  • Unfolded state means a state of being flattened without contraction or slack.
  • the dimensions of each part mean dimensions in the expanded state, not the natural length state.
  • test and measurement shall be performed in a test room or equipment in the standard state (test location: temperature 23 ⁇ 1 ° C, relative humidity 50 ⁇ 2%). To do.
  • the present invention can be used for general disposable wearing articles such as pants-type disposable diapers and tape-type disposable diapers, pad-type disposable diapers, disposable swimwear, diaper covers, sanitary napkins and the like.
  • SYMBOLS 11 Liquid impervious sheet, 12 ... Exterior body, 12A ... Side seal part, 12B ... Rear side exterior body, 12F ... Front side exterior body, 12H ... Inner nonwoven fabric layer, 12S ... Outer nonwoven fabric layer, 14 ... Hole, 14e ... Projection, 18 ... unnecessary elastic member, 19 ... elastic member, 19H ... hot melt adhesive, 20 ... cover nonwoven fabric, 200 ... interior body, 201 ... inner / outer joint, 30 ... top sheet, 40 ... intermediate sheet, 50 ... absorption Element, 56 ... absorber, 58 ... packaging sheet, 60 ... rising gather, 62 ... gathered non-woven fabric, A1 ...
  • non-stretchable region A2 ... stretchable region, C ... buttock cover part, L ... intermediate region, LD ... front-rear direction, LO ... leg opening, T ... waist area, U ... waist lower part, W ... waist part, WD ... width direction, WO ... waist opening, 70 ... sheet joint part, XD ... orthogonal direction, ED ... stretching direction, 80 It folds.

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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)
  • Dermatology (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

Le problème décrit par la présente invention est de fournir une structure étirable ayant une bonne respirabilité et une bonne flexibilité et des plis disposés de manière plus régulière. Le problème peut être résolu par une structure étirable pour un article vestimentaire jetable qui est caractérisée en ce que: au moins l'une d'une couche de tissu non tissé externe 12S et d'une couche de tissu non tissé interne 12H est un tissu non tissé poreux dans laquelle des pores 14 s'étendant à travers celle-ci dans la direction de l'épaisseur sont agencés; des parties de jonction de feuille 70 au niveau desquelles la couche de tissu non tissé externe 12S et la couche de tissu non tissé interne 12H sont jointes sont formées à des intervalles dans une direction perpendiculaire XD dans un motif en bandes qui est sensiblement continu dans une direction d'étirement ED; les pores 14 sont agencés de telle sorte que des lignes de pores 14 disposés à des intervalles dans la direction perpendiculaire à la direction d'étirement ED alternent à des intervalles dans la direction d'étirement ED; et la distance 14y dans la direction perpendiculaire XD entre les pores 14 dans les lignes de pores 14 est inférieure à la distance 70y dans la direction perpendiculaire XD entre les parties de jonction de feuille 70.
PCT/JP2019/011377 2018-03-27 2019-03-19 Structure étirable pour article vestimentaire jetable et article vestimentaire jetable de type culotte ayant une structure étirable WO2019188565A1 (fr)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110974550A (zh) * 2019-12-21 2020-04-10 雀氏（福建）实业发展有限公司 一种贴身透气学步裤的制备方法
WO2020217827A1 (fr) * 2019-04-26 2020-10-29 ユニ・チャーム株式会社 Corps stratifié et article absorbant
CN113665184A (zh) * 2021-08-25 2021-11-19 泉州市汉威机械制造有限公司 一种弹性片材及其制造方法
CN113681995A (zh) * 2021-08-25 2021-11-23 泉州市汉威机械制造有限公司 一种弹性腰围无纺布及其生产方法

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CN113679533A (zh) * 2020-05-19 2021-11-23 尤妮佳股份有限公司 吸收性物品
CN113679534A (zh) * 2020-05-19 2021-11-23 尤妮佳股份有限公司 吸收性物品

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Publication number Priority date Publication date Assignee Title
WO2017085805A1 (fr) * 2015-11-18 2017-05-26 ユニ・チャーム株式会社 Article à porter
WO2017085806A1 (fr) * 2015-11-18 2017-05-26 ユニ・チャーム株式会社 Article portable
WO2017175288A1 (fr) * 2016-04-05 2017-10-12 ユニ・チャーム株式会社 Article absorbant

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
WO2017085805A1 (fr) * 2015-11-18 2017-05-26 ユニ・チャーム株式会社 Article à porter
WO2017085806A1 (fr) * 2015-11-18 2017-05-26 ユニ・チャーム株式会社 Article portable
WO2017175288A1 (fr) * 2016-04-05 2017-10-12 ユニ・チャーム株式会社 Article absorbant

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020217827A1 (fr) * 2019-04-26 2020-10-29 ユニ・チャーム株式会社 Corps stratifié et article absorbant
JP2020179647A (ja) * 2019-04-26 2020-11-05 ユニ・チャーム株式会社 積層体、及び、吸収性物品
CN110974550A (zh) * 2019-12-21 2020-04-10 雀氏（福建）实业发展有限公司 一种贴身透气学步裤的制备方法
CN113665184A (zh) * 2021-08-25 2021-11-19 泉州市汉威机械制造有限公司 一种弹性片材及其制造方法
CN113681995A (zh) * 2021-08-25 2021-11-23 泉州市汉威机械制造有限公司 一种弹性腰围无纺布及其生产方法
CN113681995B (zh) * 2021-08-25 2023-01-13 泉州市汉威机械制造有限公司 一种弹性腰围无纺布及其生产方法

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