WO2023042457A1 - 使い捨て着用物品 - Google Patents
使い捨て着用物品 Download PDFInfo
- Publication number
- WO2023042457A1 WO2023042457A1 PCT/JP2022/014100 JP2022014100W WO2023042457A1 WO 2023042457 A1 WO2023042457 A1 WO 2023042457A1 JP 2022014100 W JP2022014100 W JP 2022014100W WO 2023042457 A1 WO2023042457 A1 WO 2023042457A1
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- WO
- WIPO (PCT)
- Prior art keywords
- welded portion
- welded
- width direction
- rear direction
- side seal
- Prior art date
Links
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Images
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
- A61F13/45—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
- A61F13/4963—Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs characterized by the seam
-
- 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
- A61F2013/49087—Absorbent articles specially adapted to be worn around the waist, e.g. diapers having breakable lateral stitches or panels
Definitions
- the present invention relates to disposable wearing articles.
- Pants-type disposable diapers and trunk-type disposable wearing articles have side seal portions in which both sides of the front body and both sides of the back body are joined by welding. There is A large number of welded portions are arranged in a predetermined pattern at intervals on the side seal portion. Forming the side seals allows the flat part to be shaped like pants or trunks with waist and leg openings.
- the methods of tearing the side seals of disposable wearing articles include a peeling method in which the welded joint between the front body and the back body is separated at the interface, and one of the front body and the back body is pulled along the welded part of the side seal part. Tearing methods for rupturing are known. In the former case, it is easy to improve the ease of tearing after use, but it becomes difficult to ensure the bonding strength during wearing. Further, in the latter case, it is easy to secure the bonding strength during wearing, but it is difficult to improve the ease of tearing after use.
- the parts adjacent to the side seals on the front body and the back body may have strength to the extent that they do not tear while being worn, so a strong tearing force is required.
- the front body or the back body in principle, either the front body or the back body is likely to tear laterally toward the center in the width direction of the article during tearing (hereinafter referred to as lateral tearing). It is a problem.
- Patent Literature 1 discloses intermittently providing a semicircular welded portion in which the inner edge is straight in the front-rear direction and the outer edge is arcuate in the front-rear direction of the side seal portion. .
- Patent Document 1 when the tear shifts from one of the welded portions adjacent in the front-rear direction to the other, the lateral tear tends to occur toward the center in the width direction of the article, and the lateral tear starts once. I can't stop it and progress. This tendency is the same as that described in Patent Document 2.
- JP 2015-96192 A Japanese Patent Application Laid-Open No. 2021-53231 JP 2018-139718 A
- the main object of the present invention is to provide a disposable wearing article that is easily torn along the side seal portions and is less prone to lateral tearing.
- Disposable wearing articles that solve the above problems are as follows. ⁇ First Aspect> having a front body, a back body, a waist opening and a pair of leg openings, Having a pair of side seal portions in which both side portions of the inner surface of the front body and both side portions of the inner surface of the back body are overlapped and welded,
- the side seal portion is a disposable wearing article in which the welded portions are arranged in a predetermined pattern at intervals, A first row in which a first welded portion and a non-welded portion having a shape elongated in the front-rear direction are alternately repeated in the front-rear direction is provided on the innermost side in the width direction of the side seal portion, A second row in which the second welded portions having a shape elongated in the front-rear direction are spaced apart in the front-rear direction is adjacent to the outer side of the first row in the width direction via a non-welding band that is continuous in the front-rear direction. is set up as The first
- a non-wearer such as a wearer or a caregiver grasps the vicinity of the waist opening of the front body with one hand, grasps the vicinity of the waist opening of the back body with the other hand, and holds the front body.
- the front body or the back body can be torn from the waist opening to the leg opening along the welded portions of the side seal portions.
- the front body or the back body instead of grasping either the front body or the back body, only the side seal portions may be grasped, or the front body or the back body may be grasped together with the side seal portions.
- the front body or the back body can be torn from the leg openings toward the waist opening.
- the front body or the back body can be torn from the leg openings toward the waist opening.
- the first welded portion has a shape such that an intermediate portion in the front-rear direction is located on the innermost side in the width direction of the side seal portion, and extends outward in the width direction toward both sides in the front-rear direction from the intermediate portion. having A disposable wearing article of the first aspect.
- the tearing force applied to the first welded portion is preferentially applied to the intermediate portion in the front-rear direction of the first welded portion.
- the rupture starts from the middle portion of the weld, and the rupture changes obliquely laterally toward the second welded portion. Therefore, when the tear moves from the first welded portion to the second welded portion, the tearing direction is easily determined, and lateral tearing is less likely to occur.
- the first welded portion has an arc shape
- the second welded portion exists in the tangential direction of both ends of the first welded portion,
- the first welded portion has an arc shape, The angle formed by the tangential direction of the first welded portion and the width direction is 30 to 90 degrees, A disposable wearing article according to any one of aspects 1 to 3.
- the dimension in the front-rear direction of the first welded portion is 0.5 to 2.0 mm
- the dimension in the width direction of the first welded part is 0.1 to 0.8 times the dimension in the front-rear direction of the first welded part
- the minimum dimension in the front-rear direction of the unwelded portion is 1.0 to 2.5 mm
- the dimension in the front-rear direction of the second welded portion is 0.2 to 1.0 times the minimum dimension in the front-rear direction of the non-welded portion
- the dimension in the width direction of the second welded portion is 0.2 to 0.6 times the dimension in the front-rear direction of the second welded portion
- the center of the second welded portion in the front-rear direction is positioned on a straight line extending in the width direction through the center of the non-welded portion in the front-rear direction
- the minimum dimension in the width direction of the non-welding band is 0.1 to 0.6 times the minimum dimension in the front-rear direction of the non-welding portion.
- a third row in which the third welded parts are spaced apart in the front-rear direction is provided outside the first row in the width direction so as to be adjacent to the non-welded zone, The second welded portion and the third welded portion are separated from each other, The area of the third welded portion is larger than the area of the first welded portion and the area of the second welded portion, and The minimum distance between the first welded part and the second welded part closest thereto is the minimum distance between the first welded part and the third welded part closest thereto, and the second welded part and the second welded part closest to it. shorter than the minimum distance to the nearest third weld,
- the disposable wearing article according to any one of aspects 1 to 5, characterized by:
- defective welding may occur such that a portion of the welded portion is not welded, or the welded portion is peeled off with a weak force.
- Such poor welding tends to occur when the welding area is small (the amount of welding material is small), such as when the first welding part and the second welding part are elongated as described above. Therefore, in order to stabilize the direction of the fracture along the first welded portion and the fracture along the second welded portion, the thinner the first welded portion and the second welded portion are, the more likely it is that defective welding will occur. .
- the third welded portion has a larger area than the first and second welded portions (that is, poor welding is less likely to occur)
- the continuity of the side seal portion can be supplemented by the third welded portion.
- the fracture along the first welded portion which is supposed to go toward the second welded portion, may move toward the third welded portion, which may impair the ease of tearing.
- a tear along the first weld is more likely to be guided toward the closer second weld and less likely to be guided toward the third weld.
- the widthwise inner end of the second welded portion and the widthwise inner end of the third welded portion are aligned in the front-rear direction, or the widthwise inner end of the third welded portion is aligned.
- the inner edge in the width direction of the second welded portion is located outside in the width direction of the A disposable wearing article according to the sixth aspect, characterized by:
- the third row may be located outside the second row in the width direction, which has an advantage as will be described later, but the width of the side seal portion is increased accordingly, and the amount of material used is increased.
- the width of the side seal portion can be prevented from being unnecessarily widened.
- the outer edge in the width direction of the second welded portion is located inside the inner edge in the width direction of the third welded portion in the width direction,
- the disposable wearing article of the sixth or seventh aspect is located inside the inner edge in the width direction of the third welded portion in the width direction.
- Both sides of the front body and both sides of the back body are portions where a plurality of sheets are laminated, In the side seal portion, a plurality of regions having different numbers of laminated sheets are arranged in the front-rear direction, The length in the width direction of the third welded portion is longer in the region where the number of laminated sheets is smaller than in the region where the number of laminated sheets is large.
- a disposable wearing article according to any one of the sixth to eighth aspects.
- the side seal portions In most disposable wearing articles having side seal portions, the side seal portions have a plurality of regions with different numbers of laminated sheets arranged in the front-rear direction.
- the widthwise length of the third welding portion is made longer in the region where the number of laminated sheets is smaller than that in the region where the number of laminated sheets is larger, defective welding is less likely to occur. This is because in a region where the number of laminated sheets is small, the amount of resin to be welded is small, so the strength tends to be weak.
- the method is not limited to this method, and for example, a plurality of third welded portions are arranged side by side at intervals in the width direction. It is also possible to make adjustments by making it larger than the area.
- a disposable wearing article that is easily torn along the side seal portion and is less prone to lateral tearing is obtained.
- FIG. 4 is a plan view showing a main portion of the side seal portion in the unfolded state; It is an enlarged view in Q part of Fig.7 (a).
- FIG. 4 is a plan view showing a main portion of the side seal portion in the unfolded state;
- FIG. 11 is a plan view showing tearing of a main portion of the side seal portion in the unfolded state;
- FIG. 11 is a plan view showing tearing of a main portion of the side seal portion in the unfolded state;
- FIG. 11 is a plan view showing tearing of a main portion of the side seal portion in the unfolded state;
- FIG. 11 is a plan view showing tearing of a main portion of the side seal portion in the unfolded state;
- It is a sectional view of a side seal part.
- Fig. 2 is a perspective view of the underpants-type disposable diaper after the side seal portions are torn;
- a pants-type disposable diaper as an example of a disposable wearing article will be described in detail below with reference to the accompanying drawings.
- the dotted pattern portion in the drawing indicates an adhesive as a bonding means for bonding each constituent member positioned on the front side and the back side thereof.
- the adhesive can be applied, for example, by solid, bead, curtain, summit or spiral application of hot melt adhesive, or by pattern coating (transfer of hot melt adhesive in letterpress mode).
- the fixing portion of the elastic member can use a hot-melt adhesive applied to the outer peripheral surface of the elastic member, such as a comb gun or Surewrap application.
- Hot-melt adhesives include, for example, EVA-based, adhesive rubber-based (elastomer-based), polyolefin-based, polyester/polyamide-based, and the like, and can be used without particular limitation.
- a joining means for joining each constituent member a means by material welding such as heat sealing or ultrasonic sealing can be used.
- nonwoven fabric in the following description, a known nonwoven fabric can be appropriately used depending on the site and purpose.
- Constituent fibers of non-woven fabrics include, for example, polyolefin-based fibers such as polyethylene or polypropylene, polyester-based synthetic fibers such as polyamide-based fibers (including composite fibers such as core-sheath fibers in addition to single-component fibers), as well as recycled rayon and cupra. Fibers, natural fibers such as cotton, etc., can be selected without particular limitation, and these can also be mixed and used. In order to increase the softness of the nonwoven fabric, it is preferable to use crimped fibers as the constituent fibers.
- nonwoven fabrics are generally classified into short fiber nonwoven fabrics, long fiber nonwoven fabrics, spunbond nonwoven fabrics, meltblown nonwoven fabrics, spunlace nonwoven fabrics, thermal bonded (air-through) nonwoven fabrics, and needle punched nonwoven fabrics, depending on the fiber length, sheet forming method, fiber bonding method, and laminate structure.
- Laminated nonwoven fabrics are manufactured as a single nonwoven fabric containing all layers, and all layers have undergone a fiber bonding process, and multiple nonwoven fabrics manufactured separately are pasted together by a joining means such as a hot-melt adhesive. Does not include matching items.
- FIG. 1 to 6 show pants-type disposable diapers.
- This pants-type disposable diaper (hereinafter also referred to simply as a diaper) comprises an exterior body 20 extending from a front body F to a back body B, and an interior body fixed to the inner surface of the exterior body 20 from the front body F to the back body B. 10 , and the inner body 10 has an absorbent body 18 interposed between a liquid-permeable top sheet 11 and a liquid-impermeable sheet 12 .
- a joining means such as a hot-melt adhesive (the dotted pattern portion in FIG. 2), the inner body 10 and the outer body 20 are assembled.
- the inner body 10 has a structure in which an absorbent body 18 is interposed between the top sheet 11 and the liquid-impermeable sheet 12, and the top sheet 11 is permeable.
- the absorbent body 18 absorbs and retains the excreted liquid.
- the planar shape of the interior body 10 is not particularly limited, it is generally rectangular as shown in the figure.
- the absorber 18 may have a single layer structure or a multilayer structure.
- Absorbent body 18 is a member containing superabsorbent polymer particles, preferably a mixed mass of pulp fibers and superabsorbent polymer particles.
- the absorbent body 18 can be wrapped with a liquid-permeable and liquid-retaining packaging sheet 14 such as crepe paper for shape and polymer retention.
- the superabsorbent polymer particles those used in this type of absorbent article can be used as they are.
- the ratio of particles remaining on the top is preferably 30% by weight or less, and the ratio of particles remaining on the sieve after sieving (shaking for 5 minutes) using a 180 ⁇ m standard sieve (JIS Z8801-1: 2006) A content of 60% by weight or more is desirable.
- the superabsorbent polymer particles are not particularly limited, those having a water absorption rate of 35 to 60 seconds and a water absorption amount of 50 to 70 g/g can be preferably used.
- Superabsorbent polymer particles include starch-based, cellulose-based, and synthetic polymer-based particles. and acrylic acid (salt) polymers can be suitably used.
- the basis weight of the superabsorbent polymer particles can be appropriately determined according to the absorbency required for the product. Therefore, although it cannot be generalized, it can be 100 to 350 g/m 2 .
- the shape of the absorber 18 can be appropriately determined, and each can be rectangular, but it is preferable to have a shape having a constricted portion 13 narrower than the front and rear sides of the crotch portion.
- the dimensions of the constricted portion 13 can be determined as appropriate, but the width of the narrowest portion can be about 40 to 60% of the total width of the absorbent body 18 .
- the top sheet 11 covering the front side (skin-contacting side) of the absorbent body 18 a perforated or non-perforated nonwoven fabric, a perforated plastic sheet, or the like is preferably used.
- the non-woven fabric is not particularly limited, but a short-fiber non-woven fabric in which fibers are bonded by a hydroentanglement method, hot air bonding, or the like is suitable when soft touch is emphasized.
- the top sheet 11 extends to the back side of the absorbent body 18 by wrapping around the side edges of the absorbent body 18 .
- the liquid-impermeable sheet 12 covering the back side (non-skin-contacting side) of the absorbent body 18 is made of a liquid-impermeable plastic sheet such as polyethylene or polypropylene. is preferably used.
- the water-impermeable/moisture-permeable sheet is obtained by, for example, forming a sheet by melt-kneading inorganic fine particles such as calcium carbonate in an olefin resin such as polyethylene or polypropylene, and then stretching the sheet in a uniaxial or biaxial direction.
- a microporous sheet can be preferably used.
- the liquid-impermeable sheet 12 is folded back on both sides in the width direction of the absorbent body 18 together with the top sheet 11.
- the present invention is not limited to such a structure, and other known structures may be employed. can be done.
- the three-dimensional gathers BS are formed that fit mainly around the legs. As shown in FIGS. 4 and 5, the three-dimensional gathers BS are composed of a fixing portion fixed to the side portion of the back surface of the inner body 10, and a front surface of the inner body 10 extending from the fixing portion to the side of the inner body 10. a main body portion extending to the sides of the main body portion, a fallen portion formed by fixing the front and rear end portions of the main body portion to the side portions of the surface of the inner body 10 in a fallen state, and the portion between the fallen portions being unfixed.
- the formed free portion is formed by a gathered sheet 15 that is folded into a double sheet, and between the double sheets, an elongated gathered elastic member 16 is arranged at the tip of the free portion or the like. ing.
- the three-dimensional gather BS has a free portion protruding from the side edge of the absorber due to contraction of the gather elastic member 16 in the product state, as indicated by the two-dot chain line in FIG.
- a water-repellent nonwoven fabric is preferably used as the gather sheet 15 .
- the gather elastic member 16 commonly used materials such as styrene-based rubber, polyolefin-based rubber, urethane-based rubber, ester-based rubber, polyurethane, polyethylene, polystyrene, styrene-butadiene, silicone, and polyester can be used. Also, in order to make it difficult to see from the outside, it is preferable to set the thickness to 925 dtex or less, the tension to 150 to 350%, and the interval to 7.0 mm or less. As the gather elastic member 16, a tape-like member having a certain width can be used in addition to the filament-like one shown in the figure.
- the gather sheet 15 is coated with a silicone, paraffin metal, or alkylchromic chloride water repellent agent to prevent permeation of urine and the like, to prevent rashes, and to improve the touch (dry feeling) to the skin. It is desirable to use a water-repellent nonwoven fabric coated with
- the exterior body 20 of the example shown in FIGS. 3 to 5 has a two-layer structure consisting of a pressing sheet 20A and a back sheet 20B.
- Elastic members 24 to 26, 28 are arranged between the sheets of the folded portion 20C folded back on the inner surface side at the edge, and the outer body 20 is contracted by the contractile force of the elastic member in the natural length state. Elasticity is provided.
- the planar shape as a whole has a substantially hourglass shape due to concave leg circumference lines 29 formed to form leg openings LO on both sides of the intermediate portion.
- the pressing sheet 20A in the illustrated example may be omitted, the folded portion 20C of the back sheet 20B in the figure may be extended to the crotch side from the elastic member closest to the crotch, and all the elastic members may be sandwiched between the sheets of the folded portion 20C. .
- a non-woven fabric is suitable from the viewpoint of breathability and texture, but as long as the side seal portion 21 can be welded, it can be used without particular limitation.
- a material such as a thermoplastic resin sheet such as an elastic film can also be used.
- a nonwoven fabric a spunbond nonwoven fabric having a fineness of 1 to 3 dtex and a basis weight of 10 to 25 g/m 2 is suitable, but a short fiber nonwoven fabric may be used for some or all of the layers.
- the constituent sheet of the exterior body 20 is a normal nonwoven fabric (elongation rate in the width direction WD is less than 200%) that hardly stretches elastically, as well as a stretchable nonwoven fabric made of elastomer fibers, an elastic film, etc. with some degree of elasticity (width direction A sheet having a WD elongation rate of 200% or more can also be used.
- the elastic members are the waist elastic member 24 arranged in the vicinity of the waist opening 23 in the expanded shape shown in FIGS. and a plurality of lower waist elastic members 25 arranged along the width direction WD at intervals, and in each of the front body F and the back body B, separately from the group of the waist lower elastic members 25, one From the side seal portion 21, along one leg opening LO toward the crotch portion, across the crotch portion, and along the other leg opening LO to the other side seal portion 21. It has a plurality of curved elastic members 26, 28 arranged at intervals without intersecting each other. These elastic members 24 to 26, 28 are fixed in a state of being elongated at a predetermined elongation rate along their extending directions. In addition, in the outer body 20, an elastic member continuous from the side seal portion 21 of the front body F to the side seal portion 21 of the back body B along the leg circumference line 29 is not provided.
- the waist elastic member 24 is a plurality of thread rubbers arranged at intervals in the vertical direction in the vicinity of the edge of the waist opening WO within the range of the side seal portion 21 where the front body F and the back body B are joined. It is an elongated elastic member such as a diaper, and is used to put the diaper on the body by applying a stretching force so as to tighten the circumference of the body.
- the waist elastic member 24 is made of thread rubber in the illustrated example, but may be made of a tape-like elastic member, for example. Also, the waist elastic member 24 in the illustrated embodiment is sandwiched between the non-woven fabrics of the folded portion 20C of the back sheet 20B in the waist portion, but may be sandwiched between the pressing sheet 20A and the back sheet 20B.
- the lower waist elastic member 25 is an elongated elastic member such as thread rubber arranged at intervals in the longitudinal direction in the range in the front-rear direction having the side seal portions 21. It is intended to give elastic force in the width direction WD to the surrounding parts, respectively, to bring the diaper into close contact with the body.
- the boundary between the waist elastic member 24 and the lower waist elastic member 25 may not necessarily be clear.
- some of them on the upper side function as the waist elastic members 24 even if the number cannot be specified. However, it is sufficient that the remaining elastic members function as the waist lower elastic member 25 .
- the back side curved elastic member 26 arranged separately from the waist lower elastic member 25 is an elongated elastic member such as thread rubber, and is arranged along a predetermined curve.
- the back curving elastic member 26 may be one, but it is preferable to have a plurality of them. They are spaced apart without intersecting each other.
- the dorsal curved elastic member 26 is not arranged substantially as a bundle of about two or three elastic members closely spaced, but preferably has a length of 3 to 20 mm so as to form a predetermined elastic zone. 3 or more, preferably 4 or more are arranged at intervals of about 6 to 16 mm.
- the ventral curved elastic member 28 arranged separately from the lower waist elastic member 25 is an elongated elastic member such as rubber thread, and is arranged along a predetermined curve. .
- the ventral curved elastic member 28 may be one, but preferably a plurality of them. In the illustrated example, there are four thread-like elastic members. , are spaced apart.
- This ventral side curved elastic member 28 is also not arranged substantially as a bundle of about two or three elastic members closely spaced, but preferably has a length of 3 to 20 mm so as to form a predetermined elastic zone. 3 or more, preferably 4 or more are arranged at intervals of about 6 to 16 mm.
- the waist lower elastic member 25 and the curved elastic members 26 and 28 arranged on the front body F and the back body B are continuously fixed to the outer body 20 at the time of manufacture, and are then absorbed.
- the width direction middle part of the part overlapping the body 18 (the part surrounded by the two-dot chain line in the figure) is finely cut in a predetermined cutting pattern to make a non-shrinkable part where the shrinkage force does not act, and the side of this non-shrinkable part
- the portion extending in the direction can be a contracted portion where a contractive force acts (that is, a portion where the waist lower elastic member 25 and the curved elastic members 26 and 28 are continuously left). This can prevent unnecessary contraction of the inner body 10 (especially the absorbent body 18) in the width direction WD.
- the waist lower elastic member 25 and the curved elastic members 26 and 28 can also be arranged continuously across the inner body 10 .
- the above-described exterior body 20 can be manufactured by the techniques described in, for example, Japanese Patent Application Laid-Open No. 4-28363 and Japanese Patent Application Laid-Open No. 11-332913.
- Japanese Patent Laid-Open Nos. 2002-35029, 2002-178428 and 2002-273808 are described. A cutting method is preferably employed.
- the curved elastic members 26, 28 may be provided only on either the front body F or the back body B. Further, when the curved elastic members 26 and 28 are provided on both the front body F and the back body B, part or all of the group of the curved elastic members 28 arranged on the front body F side and the group on the back body B side are arranged.
- the group of curved elastic members 26 arranged on the front body F side It is preferable that the group of curved elastic members 26 arranged on the back body B side is not crossed with each other and is vertically separated at a position slightly biased toward the front body F in the front-rear direction middle portion.
- the elastic members 24 to 26, 28 can be appropriately stretched when fixed, but in the case of normal adult use, the waist elastic member 24 is about 160 to 320%, and the waist lower elastic member 25 is about 160 to 320%. , the curved elastic members 26, 28 can be set to about 230 to 320%.
- the outer body 20 is continuous over the front body F and the back body B, but the front body F and the back body B are formed separately so that they are separated from each other in the front-rear direction LD of the diaper at the crotch part. You can place it.
- cover sheet As also shown in FIGS. 1 and 3, a cover sheet 50 is provided to cover the front and rear ends of the inner body 10 mounted on the inner surface of the outer body 20 and to prevent leakage from the front and rear edges of the inner body 10. , 60 may be provided.
- the front cover sheet 50 extends across the entire width direction from the inner surface of the folded portion 20C at the waist-side end portion of the inner surface of the front body F to a position overlapping the front end portion of the inner body 10.
- the rear cover sheet 60 extends across the entire width direction from the inner surface of the folded portion 20C at the waist-side end portion of the inner surface of the back body B to a position overlapping the rear end portion of the inner body 10 .
- a folded portion 20C formed by folding the outer body 20 to the inner surface of the diaper may be extended to a portion overlapping the inner body 10 to form a portion equivalent to the cover sheets 50 and 60 in the illustrated example.
- (Side seal part) 7 to 13 are enlarged views of the side seal portion 21.
- both side portions of the region located in the front body F and both side portions of the region located in the back body B of the outer body 20 overlap each other (in a palm-to-arm shape). It is welded and formed as follows.
- the front body F and the back body B are not joined, so that the side seal portions 21 move in the direction perpendicular to the width direction WD (vertical direction).
- a leg opening LO is formed at one end and a waist opening WO is formed at the other end.
- the side seal portions 21 are continuous from the waist opening WO to the leg openings LO.
- the side seal portion 21 is a portion in which a large number of welded portions are arranged in a predetermined pattern at intervals.
- the first row 81 alternately repeated is provided on the innermost side in the width direction WD of the side seal portion 21, and the second welded portion 72 elongated in the front-rear direction LD is outside the non-welded portion 74 in the width direction WD.
- the first welded portion 71 and the second welded portion 72 are alternately present.
- the second row 82 in which the second welded portions 72 are present in the front-rear direction LD is provided outside the first row 81 in the width direction WD so as to be adjacent to the front-rear direction LD via the non-welding band 75 .
- the vicinity of the side seal portion 21 of the outer body 20 in the front body F and the vicinity of the side seal portion 21 of the outer body 20 in the back body B, for example, are grasped by the caregiver with the right hand and left hand, respectively.
- the outer body 20 of the front body F or the outer body 20 of the back body B is moved to the side seal part 21 by applying an external force to the side seal part 21 in the direction of moving the right hand and the left hand away from each other.
- the tearing position is basically along the welded portions 71 and 72 .
- the welded portions 71 and 72 are elongated in the width direction WD, the direction of tearing is likely to be the width direction WD.
- the welded portions 71 and 72 and the non-welded portion 74 are simply arranged in a pattern that repeats in the front-rear direction LD, tearing from one welded portion 71 , 72 to the next welded portion 71 , 72 will not work.
- the first welded portion 71 is positioned further inside in the width direction WD than the second welded portion 72, as in the illustrated example, the side seal portions 21 of the front body F or the back body B
- the tearing force is preferentially applied to the first welded portion 71 due to the elongation of the material, and the tear occurs and progresses in the front body F or the back body B.
- a tearing force is applied to the second welded portion 72 later than the first welded portion 71 due to the elongation of the non-welded portion 74, and the tear occurs and progresses.
- the first welded portion 71 is the welded portion closest to the tear start position, and there is no weld between the edge of the waist opening WO and the first welded portion 71, which is the point where tearing starts.
- the tearing cycle of (a) to (c) described above starts in order along the tearing direction of the side seal portion 21, and as the tear progresses, the first In the rupture cycle, the rupture force concentrates on the portion connecting the edge of the waist opening WO and the rupture along the leading first welded portion 71 in the process of (a) to (b).
- the second welded portion 72 is the welded portion closest to the tear start position, and the edge of the waist opening WO, which is the point where tearing starts, and the second welded portion 72 at the top.
- the above (d) and (e) tearing cycles are started in order along the tearing direction of the side seal portion 21, and tearing progresses, and in the first tearing cycle, the above ( In the process of d), tearing force concentrates on a portion of the unwelded band 75 that connects the edge of the waist opening WO and the tear along the second welded portion 72 at the top, and the portion is torn.
- the entire side seal portion 21 is easily torn along the side seal portion 21, and lateral tearing is less likely to occur. becomes.
- the rupture along the welded portions 71 and 72 means the tear that continues along the inner edge of the welded portions 71 and 72 in the width direction WD, and the tear that continues along the outer edge of the welded portions 71 and 72 in the width direction WD.
- one side of the welded parts 71, 72 passing through the inside of the welded parts 71, 72 and continuing from one side to the other side in the front-rear direction LD of the welded parts 71, 72, and a plurality of these fractures at different positions are connected to form one fracture in the front and rear of the welded parts 71, 72.
- a tear along a certain welded portion 71 or 72 may extend from one side of the welded portion 71 or 72 in the longitudinal direction LD along the inner edge of the welded portion 71 or 72 in the width direction WD.
- the side seal portion 21 of the illustrated example is formed by laminating a material forming the outer body 20 of the front body F and a material forming the outer body 20 of the back body B and joining them by welding.
- the welded parts 71 and 72 become film-like due to melting of the nonwoven fabric, making them difficult to stretch and fragile.
- the non-welding portion 74 and the non-welding band 75 remain as stretchable non-woven fabric structures. Therefore, tearing force is likely to be applied to the welded portions 71 and 72, and tearing is likely to occur along the outer periphery of the welded portion or along a thin and fragile portion within the welded portion. From this point of view, it is preferable that the elongation percentage in the width direction WD of the nonwoven fabric is 130 to 170%.
- the width 21W of the side seal portion 21 can be determined as appropriate, it is preferably 2 to 8 mm, more preferably 4 to 6 mm, for example. If the width 21W of the side seal portion 21 is shorter than 2 mm, the welding accuracy between the ventral outer covering and the back outer covering is required, and if it is longer than 8 mm, the side seal portion 21 becomes bulky.
- the first welded portion 71 may have a shape elongated in the front-rear direction LD.
- the first welding portion 71 has a vertically long rectangular shape (FIG. 7(c)), an arc extending from a middle portion in the front-rear direction LD toward both sides in the front-rear direction LD so as to be positioned inside or outside the width direction WD.
- a shape such as a semicircle having a peripheral edge consisting of an arc and a straight line along the front-back direction connecting both ends (Fig. 9 (c)), a vertically oblong shape, a dogleg shape (Fig. 7 (d)), a circular arc, etc. arc shape (FIGS. 7A and 7B), wave shape, or the like.
- the shape of the first welded portion 71 is preferably such that the tearing force directed from the first welded portion 71 to the second welded portion 72 is less likely to move inward in the width direction WD.
- the shape of the first welded portion 71 is preferably such that the tearing force directed from the first welded portion 71 to the second welded portion 72 is less likely to move inward in the width direction WD.
- the intermediate portion in the direction LD is positioned on the innermost side in the width direction WD of the side seal portion 21 and extends from the intermediate portion toward both sides in the front-rear direction LD so as to be positioned on the outer side in the width direction WD, the first welding The tearing force applied to the portion 71 is preferentially applied to the intermediate portion of the first welded portion 71 in the front-rear direction LD. It changes obliquely sideways so as to face the portion 72 . Therefore, when the tear moves from the first welded portion 71 to the second welded portion 72, the direction of the tear is easily fixed, and lateral tearing is less likely to occur.
- the intermediate portion of the first welding portion 71 in the front-rear direction LD is located on the outermost side in the width direction WD of the side seal portion 21, and the first weld portion 71 is located on the inside in the width direction WD from the intermediate portion toward both sides in the front-rear direction LD. It may be extended as
- the dimensions of the first welded portion 71 can be appropriately determined, but the length 71L in the front-rear direction LD is preferably 0.5 to 2.0 mm, particularly 0.8 to 1.5 mm, and the length in the width direction WD is preferably 0.5 to 2.0 mm. 71W is preferably 0.1 to 0.8 times the longitudinal length 71L. Further, the length 71W in the width direction WD of the first welded portion 71 is specifically 0.1 to 0.5 mm, preferably 0.2 to 0.4 mm. Although it is preferable that the dimensions of the first welded parts 71 are constant, the dimensions of some of the first welded parts 71 may differ from the dimensions of the other first welded parts 71 .
- the length 74L of the non-welding portion 74 of the first row 81 in the front-rear LD direction is preferably 1.0 to 2.5 mm, more preferably 1.3 to 2.0 mm.
- the dimensions of the non-welding parts 74 are constant, the dimensions of some of the non-welding parts 74 may differ from the dimensions of the other non-welding parts 74 .
- the second welded portion 72 can be appropriately determined as long as it has a shape elongated in the front-rear direction LD.
- the second welded portion 72 may be curved in the same direction as the first welded portion 71, but may
- the intermediate portion of the LD is positioned on the innermost side in the width direction WD of the side seal portion 21 and extends from the intermediate portion toward both sides in the front-rear direction LD so as to be positioned on the outer side in the width direction WD
- the second welding portion 72 may have a shape extending inward in the width direction WD toward both sides in the front-rear direction LD from the intermediate portion in the front-rear direction LD.
- the second welded portion 72 has a shape having a peripheral edge formed by an arc such as a circular arc and straight lines connecting both ends thereof, for example, a semicircular shape
- the arc-shaped peripheral edge It can have a shape that extends toward both sides in the direction LD so as to be located inside or outside the width direction WD.
- the upper limit of the length 72L of the front-rear direction LD of the second welded portion 72 is the length 71L of the front-rear direction LD of the first welded portion 71 and the non-welding length 71L of the first welded portion 71 . It is preferably shorter than the sum of the length 74L in the front-rear LD direction of the portion 74, for example, 0.6 times. 0.4 times is preferred. In particular, the length 72L of the second welded portion 72 in the front-rear direction LD is preferably shorter than the length 71L of the first welded portion 71 in the front-rear direction, for example, 0.4 to 0.9 times.
- the length 72W in the width direction WD of the second welded portion 72 is preferably 0.2 to 0.6 times the length 72L in the front-rear direction LD. More specifically, the length 72L of the second welded portion 72 in the front-rear direction LD is preferably 0.5 to 1.2 mm, particularly 0.7 to 1.0 mm. length 72W of 0.1 to 0.5 mm, preferably 0.2 to 0.4 mm.
- the position of the second welded portion 72 in the front-rear direction LD is not particularly limited as long as it has a portion positioned outside the non-welded portion 74 of the first row 81 in the width direction WD.
- the center of the LD may be shifted in either direction forward or backward with respect to a straight line extending in the width direction WD passing through the center of the non-welding portion 74 of the first row 81 in the front-rear direction LD. It is preferable that the welded portion 74 is positioned on a straight line extending in the width direction WD through the center of the welded portion 74 in the front-rear direction LD, because tearing becomes smooth.
- the length 72L of the second welded portion 72 in the front-rear direction LD is preferably shorter than the length 74L of the non-welded portion 74 of the first row 81 in the front-rear direction LD, for example, 0.3 to 0.8 times. Although it is preferable to have it, it may be equal to or longer than the length 74L of the non-welding portion 74 of the first row 81 in the front-rear LD direction.
- the interval in the front-rear direction LD of the second welded portions 72 in the second row 82 can be determined by the size and arrangement of the second welded portions 72 in the front-rear direction LD. In particular, it is preferable that it is 2.0 to 2.5 mm.
- the minimum dimension 75W (the minimum distance between the first row 81 and the second row 82) of the non-welding zone 75 in the width direction WD can be determined as appropriate, but the dimension of the non-welding portion 74 of the first row 81 in the front-rear direction LD It is preferably shorter than 74L (the interval in the front-rear direction LD of the first welded portions 71), for example, 0.2 to 0.8 times. More specifically, the minimum dimension 75W of the non-welding band 75 in the width direction WD is preferably 0.3 to 1.5 mm, more preferably 0.5 to 1.0 mm.
- the first welded portion 71 is arcuate, if the second welded portion 72 has a portion located on the tangential extension line of both ends of the first welded portion 71, an inconsistency between the first welded portion 71 and the second welded portion 72 may occur.
- the tearing of the weld band 75 is easily guided from the first welded portion 71 to the second welded portion 72, and the shape is such that it is easy to prevent an unintended lateral tear inward in the width direction WD from occurring.
- the first welded portion 71 has a dogleg shape, if the second welded portion 72 exists on the extension line of both ends of the first welded portion 71 , tearing occurs from the first welded portion 71 to the second welded portion 72 . It is easy to induce
- the tearing force is increased when the angle ⁇ between the tangential direction of the first welded portion 71 and the width direction WD is 30 to 90 degrees, more preferably 30 to 70 degrees. Since it is easier to propagate in the front-rear direction LD than in the direction WD, tearing in the vertical direction can be easily performed while preventing lateral tearing.
- the angle ⁇ between both ends of the first welded portion 71 and the width direction WD is 30 to 90 degrees, preferably 30 to 70 degrees. , the tearing force is transmitted more easily in the front-rear direction LD than in the width direction WD, so that tearing in the longitudinal direction can be easily performed while preventing lateral tearing.
- the side seal portion 21 may consist of only the first welded portion 71 and the second welded portion 72.
- the first welded portion 71 or the second welded portion If 72 has poor welding (including cases where it is not welded but is insufficient and can be easily peeled off, as well as cases where it is not welded), unintended tearing may occur at the poorly welded part when worn, and the feeling of wearing and appearance may deteriorate. Therefore, as shown in FIG. 7 and the like, a third row 83 in which the third welded parts 73 spaced apart from the second welded parts 72 are arranged in a row in the front-rear direction LD at intervals is arranged outside the first row 81 in the width direction WD.
- the third welded part 73 can seal the side seal portion. 21 continuity can be compensated. Welding defects tend to occur when the welding area is small (the amount of welding material is small), such as when the first welding part 71 and the second welding part 72 are elongated as described above.
- the area of the first welded portion 71 and the area of the second welded portion 72 is larger than the area of the first welded portion 71 and the area of the second welded portion 72, and is, for example, 2 to 5 times the larger one of the area of the first welded portion 71 and the area of the second welded portion 72. It is preferable to have
- the shape of the third welded portion 73 is not particularly limited, and may be a polygon such as a rectangle, a circle, an ellipse, an arc shape such as an arc, a wave shape, or the like. Therefore, the third welded portion 73 may have a shape elongated in the width direction WD as shown in the figure, or may have a shape elongated in the front-rear direction LD. Further, a plurality of the third welded portions 73 may be provided so as to be arranged at intervals in the front-rear direction LD, the width direction WD, or the oblique direction.
- the third welded portion 73 prevents the continuity of the side seal portion 21 .
- the third welded portion 73 is outside the first welded portion 71 in the width direction WD and is continuous with the portion between the adjacent second welded portions 72 and the outside thereof in the width direction WD. It is preferably located in the portion where
- the dimensions of the third welded portion 73 can be determined as appropriate, but if the third welded portion 73 has a horizontally long shape, the length 73L in the front-rear direction LD of the third welded portion 73 is 0.2 to 0.6 mm, particularly 0.3 to 0.3 mm. It is preferably 5 mm, and the length 73W in the width direction WD is preferably 1.5 to 5.0 mm, particularly preferably 2.5 to 3.5 mm. In the case of a vertically elongated shape, the length 73L in the front-rear direction LD of the third welding portion 73 is preferably 0.5 to 1.5 mm, particularly 0.7 to 1.3 mm, and the length 73W in the width direction WD is 0.
- the dimensions of the third welded parts 73 are constant, the dimensions of some of the third welded parts 73 may differ from the dimensions of other third welded parts 73 .
- the welded portions other than the first welded portion 71, the second welded portion 72, and the third welded portion 73 may or may not exist. In addition, it is preferable not to exist.
- the minimum distance d1 between the first welded portion 71 and the closest second welded portion 72 is the minimum distance d2 between the first welded portion 71 and the closest third welded portion 73, and the second welded portion It is preferably shorter than the minimum distance d3 between the portion 72 and the third welded portion 73 closest thereto, for example, 0.2 to 0.9 times the shorter of d2 and d3. This is to make it easier for the first welded portion 71 and the second welded portion 72 to be torn continuously, and to make it more difficult for tearing or lateral tearing to other locations to occur.
- the positional relationship between the second welded portion 72 and the third welded portion 73 can be determined as appropriate. As shown in FIG. 9C, even if the outer end in the width direction WD of the second welded portion 72 is located inside the inner end in the width direction WD of the third welded portion 73 in the width direction WD, As shown in FIG. 9B, the inner end of the second welded portion 72 in the width direction WD is located outside the inner end of the third welded portion 73 in the width direction WD.
- the inner end in the width direction WD of the second welded portion 72 is located inside the inner end in the width direction WD of the third welded portion 73 in the width direction WD, may be located outside in the width direction WD of the inner end of the third welded portion 73 in the width direction WD.
- the inner end of the second welded portion 72 in the width direction WD and the inner end of the third welded portion 73 in the width direction WD extend along the front-rear direction LD. Even if they are arranged on a straight line, as shown in FIG. An inner edge may be located. In this case, since the second row 82 is included in the third row 83, the length of the side seal portion 21 in the width direction WD is shortened, and the hardness of the side seal portion 21 is reduced. discomfort is likely to be reduced.
- the outer end of the second welded portion 72 in the width direction WD is located inside the inner end of the third welded portion 73 in the width direction WD. Then, the positions of the first row 81, the second row 82, and the third row 83 in the width direction WD are positioned without overlapping in order from the inside to the outside in the width direction WD, and welding in each row is performed. The change in the area ratio (welding rate) of the part is reduced, and the welding is easily stabilized.
- the front body F and the back body B are each formed by laminating a plurality of sheets, as shown in FIG.
- the number of stacked layers of the lower side seal portion 21L is almost always smaller than the number of stacked layers of the upper side seal portion 21U. Therefore, as shown in FIG. 9D, the length of the third welded portion 73 in the width direction WD is larger in the area where the number of stacked sheets is smaller than in the area where the number of stacked sheets is larger than the side seal portion upper portion 21U.
- a certain side seal portion lower portion 21L may have a longer shape. This is because in a region where the number of laminated sheets is small, the amount of resin to be welded is small, so the strength tends to be weak.
- the welding may be too strong or too weak, resulting in poor welding. may occur.
- poor welding can be improved by increasing the number of third welding portions 73 existing in the side seal portion 21 in the side seal portion lower portion 21L than in the side seal portion upper portion 21U.
- the strength of welding can be appropriately adjusted according to the number of laminated sheets.
- the welding force may be changed for each. For example, in the portion where the cover sheet 50 does not exist and where the cover sheet 60 exists, the number of welds is increased, the length is increased, or the width is made thicker than the portion where the cover sheet 50 and the cover sheet 60 exist. It is also possible to strengthen welding by combining
- ⁇ "Front-back direction means the direction (longitudinal direction) indicated by symbol LD in the figure
- “width direction” means the direction (left-right direction) indicated by WD in the figure. are orthogonal.
- ⁇ "The vertical direction is the direction (longitudinal direction) indicated by symbol VE in FIGS. , specifically, a straight line connecting the center of the waist opening and the center of the inner body.
- the "deployed state” means a state of being flatly unfolded without contraction (including any contraction such as contraction due to an elastic member) or slack.
- Elongation rate means a value when the natural length is taken as 100%. For example, an elongation rate of 200% is synonymous with an elongation ratio of 2 times.
- - "Matsuke” is measured as follows. After pre-drying the sample or test piece, it is left in a test room or apparatus under standard conditions (test location: temperature 23 ⁇ 1° C., relative humidity 50 ⁇ 2%) to a constant weight. Pre-drying refers to making a sample or test piece constant weight in an environment at a temperature of 100°C. Fibers with an official moisture content of 0.0% do not need to be pre-dried. Using a sampling template (100 mm x 100 mm), a sample with dimensions of 100 mm x 100 mm is cut from the constant weight specimen.
- the weight of the sample is measured, multiplied by 100 to calculate the weight per square meter, and used as basis weight.
- the “water absorption” is measured according to JIS K7223-1996 “Testing method for water absorption of super absorbent polymer”.
- ⁇ "Water absorption rate” is "Time to end point” when JIS K7224-1996 "Test method for water absorption rate of superabsorbent polymer” is performed using 2g of superabsorbent polymer and 50g of physiological saline.
- ⁇ "Nonwoven fabric elongation is measured by applying a constant load to the sample at a constant speed using a constant speed elongation type tensile tester with accuracy specified in JIS B 7721 based on ISO 9073-3.
- test and measurement Perform and measure "tensile strength and elongation". ⁇ If there is no description about environmental conditions for testing and measurement, the test and measurement shall be performed in a laboratory or equipment under standard conditions (test location: temperature 23 ⁇ 1°C, relative humidity 50 ⁇ 2%). do. ⁇ Unless otherwise specified, the dimensions of each part mean the dimensions in the unfolded state, not in the natural length state.
- the present invention can be used for general absorbent articles such as pants-type disposable diapers such as the above example.
- SYMBOLS 10 Inner body, 11... Top sheet, 12... Liquid-impermeable sheet, 13... Constricted part, 14... Packaging sheet, 15... Gather sheet, 16... Gather elastic member, 18... Absorbent body, 20... Exterior body, 20C ... folded part 21... side seal part 24... waist elastic member 25... lower waist elastic member 26, 28... curved elastic member 26... dorsal curved elastic member 28... ventral curved elastic member 29... leg Surrounding line, B... back body, BS... three-dimensional gather, F... front body, 71... first welding part, 72... second welding part, 73... third welding part, 74... non-welding part, 75... non-welding band , 81...first column, 82...second column, 83...third column.
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Abstract
Description
<第1の態様>
前身頃と、後身頃と、ウエスト開口及び一対の脚開口とを有し、
前記前身頃の内面の両側部と前記後身頃の内面の両側部とが重ね合わされて溶着された一対のサイドシール部を有し、
前記サイドシール部は、溶着部が間隔を空けて所定のパターンで配列された部分である、使い捨て着用物品であって、
前後方向に細長く延びた形状の第1溶着部と不溶着部とが前後方向に交互に繰り返す第1列が、前記サイドシール部における最も幅方向の内側に設けられ、
前後方向に細長く延びた形状の第2溶着部が前後方向に間隔を空けて連なる第2列が、前記第1列の幅方向の外側に、前後方向に連続する不溶着帯を介して隣接するように設けられ、
前記第2溶着部が、前記不溶着部の幅方向の外側に位置するように、前記第1溶着部及び前記第2溶着部が互い違いに配置された、
ことを特徴とする使い捨て着用物品。
本使い捨て着用物品では、例えば、着用者又は介護者等の非着用者が片方の手で前身頃のウエスト開口の近傍を掴み、反対の手で後身頃のウエスト開口の近傍を掴み、前身頃の側部と後身頃の側部とを引き離すように力を加えると、前身頃又は後身頃をウエスト開口から脚開口までサイドシール部の溶着部に沿って引き裂くことができる。前身頃及び後身頃のいずれか一方を掴むのに代えて、サイドシール部のみを掴んでもよいし、サイドシール部とともに前身頃又は後身頃を掴んでもよい。また、手で掴む部分を脚開口の近傍にすることにより、前身頃又は後身頃を脚開口からウエスト開口に向かって引き裂くこともできる。
このような引き裂き方式において、サイドシール部の溶着部のパターンが本態様のように配列されていると、後述するように、サイドシール部に沿って引き裂きやすくなるとともに、横裂けも起こりにくくなる。
前記第1溶着部は、前後方向の中間部が前記サイドシール部の最も幅方向の内側に位置し、前記中間部から前後方向の両側に向かうにつれて幅方向の外側に位置するように延びた形状を有する、
第1の態様の使い捨て着用物品。
第1溶着部が本態様のような形状を有すると、第1溶着部に対する引き裂き力は、第1溶着部における前後方向の中間部に優先的に加わるため、主に第1溶着部における前後方向の中間部から断裂が始まり、その断裂が第2溶着部に向かうように斜め横向きに変化するようになる。よって、第1溶着部から第2溶着部に引き裂きが移行するときの断裂の方向が定まりやすくなり、横裂けが発生しにくくなる。
前記第1溶着部は弧状をなしており、
前記第1溶着部の両端の接線方向に前記第2溶着部が存在する、
第2の態様の使い捨て着用物品。
本態様のように第1溶着部が弧状をなしていると、断裂が第2溶着部に向かうように斜め横向きに変化する際、力の方向の変化が円滑になる。また、第1溶着部の両端の接線方向に第2溶着部が存在するため、第1溶着部に沿う断裂が第2溶着部に沿う断裂につながる際の不溶着帯の断裂の方向が定まりやすくなり、不溶着帯が伸びても、そこからの横裂けが起こりにくいものとなる。
前記第1溶着部は弧状をなしており、
前記第1溶着部の接線の方向と幅方向とのなす角が30~90度である、
第1~3のいずれか1つの態様の使い捨て着用物品。
第1溶着部が本態様のような弧状であると、第1溶着部に沿う断裂が横方向よりも縦方向へ進みやすくなり、横裂けを防ぎながら縦方向への引裂きを行いやすくなる。
前記第1溶着部の前後方向の寸法は0.5~2.0mmであり、
前記第1溶着部の幅方向の寸法は、前記第1溶着部の前後方向の寸法の0.1~0.8倍であり、
前記不溶着部の前後方向の最小寸法は1.0~2.5mmであり、
前記第2溶着部の前後方向の寸法は、前記不溶着部の前後方向の最小寸法の0.2~1.0倍であり、
前記第2溶着部の幅方向の寸法は、前記第2溶着部の前後方向の寸法の0.2~0.6倍であり、
前記第2溶着部の前後方向の中央は、前記不溶着部の前後方向の中央を通り幅方向に延びる直線上に位置しており、
前記不溶着帯の幅方向の最小寸法は、前記不溶着部の前後方向の最小寸法の0.1~0.6倍である、
第1~4のいずれか1つの態様の使い捨て着用物品。
各部の寸法・配置は適宜定めることができるが、通常の場合、本態様の範囲内であると好ましい。
第3溶着部が前後方向に間隔を空けて連なる第3列が、前記第1列の幅方向の外側に、前記不溶着帯を介して隣接するように設けられ、
前記第2溶着部と前記第3溶着部とは離間しており、
前記第3溶着部の面積は、前記第1溶着部の面積及び前記第2溶着部の面積よりも大きく、
前記第1溶着部とこれに最も近い前記第2溶着部との最小間隔は、前記第1溶着部とこれに最も近い前記第3溶着部との最小間隔、並びに前記第2溶着部とこれに最も近い前記第3溶着部との最小間隔よりも短い、
ことを特徴とする第1~5のいずれか1つの態様に記載の使い捨て着用物品。
サイドシール部においては、一部の溶着部が溶着していない、又は溶着しているが弱い力で剥離してしまうといった溶着不良が発生することがある。このような溶着不良は、前述のように第1溶着部及び第2溶着部を細長い形状とする等、溶着面積が小さい(溶着材料の量が少ない)場合に発生しやすい。よって、第1溶着部に沿う断裂及び第2溶着部に沿う断裂の方向を安定化するために、第1溶着部及び第2溶着部を特に細くすればするほど、溶着不良が発生しやすくなる。これに対して、本態様のように、第1溶着部及び第2溶着部よりも面積の大きい(つまり、溶着不良が起きにくい)第3溶着部を有していると、第1列の一部の第1溶着部、又は第2列の一部の第2溶着部が溶着不良により剥離していても、第3溶着部によりサイドシール部の連続性を補うことができる。
また、単に第3溶着部を設けるだけでは、第1溶着部に沿う断裂から第2溶着部に向かうはずの断裂が第3溶着部に向かってしまい、引き裂きの容易性が損なわれるおそれがある。しかし、本態様では、第1溶着部に沿う断裂は、より近い第2溶着部に向かって誘導されやすく、第3溶着部に向かって誘導されにくいものとなる。
前記第2溶着部の幅方向の内側の端と前記第3溶着部の幅方向の内側の端とが前後方向に沿う一直線上に並ぶか、又は
前記第3溶着部の幅方向の内側の端よりも幅方向の外側に、前記第2溶着部の幅方向の内側の端が位置する、
ことを特徴とする第6の態様の使い捨て着用物品。
第3列は、第2列よりも幅方向の外側に位置していてもよく、後述するように利点もあるが、その分だけサイドシール部の幅が広くなり、素材使用量が多くなる。これに対して、本態様のように、第2溶着部及び第3溶着部が配置されていることで、サイドシール部の幅を不必要に広げずに済むようになる。
前記第3溶着部の幅方向の内側の端よりも幅方向の内側に、前記第2溶着部の幅方向の外側の端が位置する、
第6又は7の態様の使い捨て着用物品。
本態様の場合、前後方向からサイドシール部を見たとき、第1列、第2列、及び第3列が重ならずに存在するため、各列における溶着部の面積率(溶着率)の変化が少なくなり、溶着が安定化しやすい。
前記前身頃の両側部及び前記後身頃の両側部は、それぞれ複数のシートが積層された部分であり、
前記サイドシール部は、前記シートの積層数が異なる複数の領域が前後方向に並んでおり、
前記第3溶着部の幅方向の長さが、前記シートの積層枚数が多い領域より前記シートの積層枚数が少ない領域の方が長い、
第6~8のいずれか1つの態様の使い捨て着用物品。
サイドシール部を有する使い捨て着用物品では、サイドシール部はシートの積層数が異なる複数の領域が前後方向に並んでいることが殆どである。そして、このようなサイドシール部に沿って前述の引き裂きを行う場合、第3溶着部の幅方向の長さがすべて同じであると、溶着不良が発生しやすくなる。これに対して、本態様のように、シートの積層枚数が少ない領域では第3溶着部の幅方向の長さをシートの積層枚数が多い領域よりも長くすると、溶着不良が発生しにくくなる。シートの積層枚数が少ない領域では、溶着する樹脂量が少なくなるため、強度が弱くなりがちだからである。なお、この方法に限られず、例えば第3溶着部を幅方向に間隔を空けて複数並べて設け、シートの積層枚数が少ない領域における第3溶着部が幅方向に並ぶ数をシートの積層枚数が多い領域よりも多くすることで調整することも可能である。
内装体10は、図3~図5に示すように、トップシート11と液不透過性シート12との間に、吸収体18を介在させた構造を有しており、トップシート11を透過した***液を吸収体18により吸収保持するものである。内装体10の平面形状は特に限定されないが、図示形態のようにほぼ長方形とすることが一般的である。
吸収体18は単層構造であっても多層構造であってもよい。吸収体18は、高吸収性ポリマー粒子を含む部材であり、好ましくはパルプ繊維及び高吸収性ポリマー粒子の混合集積物である。吸収体18は、形状及びポリマー保持等のため、クレープ紙等の、液透過性及び液保持性を有する包装シート14によって包装されたものとすることができる。
外装体20は、公知の構造を特に限定なく採用することができる。図3~図5に示される例の外装体20は、押さえシート20A及びバックシート20Bからなる2層構造とされ、押さえシート20Aとバックシート20Bとの間、及びバックシート20Bをウエスト開口WOの縁で内面側に折り返してなる折り返し部分20Cのシート間に弾性部材24~26,28が配設され、自然長状態で弾性部材の収縮力により外装体20が収縮することにより、外装体20に伸縮性が付与されている。平面形状は、中間両側部にそれぞれ脚開口LOを形成するために形成された凹状の脚周りライン29により、全体としてほぼ砂時計形状をなしている。図示例の押さえシート20Aを省略し、図中のバックシート20Bの折り返し部分20Cを最も股間側の弾性部材よりも股間側まで延長し、すべての弾性部材を折り返し部分20Cのシート間に挟んでもよい。
図1及び図3にも示されるように、外装体20の内面上に取り付けられた内装体10の前後端部をカバーし、かつ内装体10の前後縁からの漏れを防ぐために、カバーシート50,60が設けられていても良い。図示形態についてさらに詳細に説明すると、前カバーシート50は、前身頃F内面のうちウエスト側端部の折り返し部分20Cの内面から内装体10の前端部と重なる位置まで幅方向全体にわたり延在しており、後カバーシート60は、後身頃B内面のうちウエスト側端部の折り返し部分20Cの内面から内装体10の後端部と重なる位置まで幅方向全体にわたり延在している。外装体20をおむつ内面に折り返してなる折り返し部分20Cを、内装体10と重なる部分まで延在させて、図示例のカバーシート50,60と同等の部分を形成することもできる。
図7から図13は、サイドシール部21を拡大して示したものであり、第2溶着部72の内側端又は後述する第3溶着部73の内側端に前後方向LDに延びる点線は、補助線を示す。図示例のサイドシール部21は、外装体20のうち、前身頃Fに位置する領域の両側部と、後身頃Bに位置する領域の両側部とが、内面同士が重なり合う(合掌状となる)ように溶着されて形成されている。また、サイドシール部21よりも幅方向WDの中央側に位置する領域では、前身頃F及び後身頃Bが接合されないことによって、サイドシール部21における幅方向WDに直交する方向(上下方向)の一端に脚開口LOが形成され、他端にウエスト開口WOが形成される。換言すると、サイドシール部21はウエスト開口WOから脚開口LOまで連続する。サイドシール部21は、多数の溶着部が間隔を空けて所定のパターンで配列された部分であり、前後方向LDに細長く延びた形状の第1溶着部71と不溶着部74とが前後方向LDに交互に繰り返す第1列81が、サイドシール部21における幅方向WDの最も内側に設けられ、前後方向LDに細長く延びた形状の第2溶着部72が不溶着部74の幅方向WD外側に設けられ、第1溶着部71と第2溶着部72が互い違いに存在する。第2溶着部72が前後方向LDに存在する第2列82は、第1列81の幅方向WDの外側に、前後方向LDに連続する不溶着帯75を介して隣接するように設けられている。
これに対して、図示例のように、第1溶着部71が第2溶着部72よりも幅方向WDの内側に離れて位置していると、前身頃F又は後身頃Bにおいてサイドシール部21に沿って引き裂くための力を加えたとき、素材の伸びもあって、第1溶着部71に優先的に引き裂き力が加わり、前身頃F又は後身頃Bにおいて断裂が発生・進行する。第2溶着部72は、不溶着部74の伸びもあって第1溶着部71に遅れて引き裂き力が加わり、断裂が発生・進行することになる。
この結果、引裂き開始地点であるウエスト開口WOの縁に、第1溶着部71が位置する場合を考えると、図10で示すように、
(a)前後方向LDに隣り合う第1溶着部71の一方に沿う断裂、及び他方に沿う断裂が、ほぼ同時又は一方の断裂が先に発生し、
(b)上記(a)が進行中又は完了してから、それら第1溶着部71の間の幅方向WDの外側に位置する第2溶着部72に沿う断裂が発生し、
(c)その後に、不溶着帯75のうち第1溶着部71に沿う断裂と第2溶着部72に沿う断裂とを繋ぐ一対の部分がほぼ同時又は順次断裂する、という微視的な断裂サイクルが、サイドシール部21の引き裂き方向に沿って順に開始し、引き裂きが進行する。この際、上記(a)(b)の段階では第1溶着部71及び第2溶着部72が前後方向LDに細長く延びた形状であるため、引き裂きの方向が前後方向LDに定まり、横裂けが発生しにくくなる。また、上記(c)の段階では、第1溶着部71に沿う部分及び第2溶着部72に沿う部分が既に断裂しているため、それらを繋ぐ部分に力が集中して、第1溶着部71に沿う断裂から第2溶着部72に沿う断裂に向かうように(つまり斜め横向きに)断裂が促され、横裂けが発生しにくくなる。したがって、サイドシール部21全体としてみても、サイドシール部21に沿って引き裂きやすく、横裂けが起こりにくいものとなる。
(d)先頭の第2溶着部72に沿う断裂、及びこれに最も近い第1溶着部71に沿う断裂が、ほぼ同時又はいずれかの断裂が先に発生し、
(e)上記(d)の断裂が完了してから、不溶着帯75のうち先頭の第2溶着部72に沿う断裂とそれに最も近い第1溶着部71に沿う断裂とを繋ぐ部分が断裂し、
その一方で、上記(d)とともに、先頭の第2溶着部72に最も近い第1溶着部71と、これに隣り合う次の第1溶着部71とを始まりとして、上記(a)~(c)の断裂サイクルが、サイドシール部21の引き裂き方向に沿って順に開始し、引き裂きが進行することとなる。
この場合、上記(d)の段階では第1溶着部71及び第2溶着部72が前後方向LDに細長く延びた形状であるため、引き裂きの方向が前後方向LDに定まり、横裂けが発生しにくくなる。また、上記(e)の段階では、先頭の第2溶着部72に沿う部分及びこれに続く第1溶着部71に沿う部分が既に断裂しているため、それらを繋ぐ部分に力が集中して、先頭の第2溶着部72に沿う断裂からその次の第1溶着部71に沿う断裂に向かうように(つまり斜め横向きに)断裂が促され、横裂けが発生しにくくなる。
明細書中で以下の用語が使用される場合、明細書中に特に記載が無い限り、以下の意味を有するものである。
・「前後方向」とは図中に符号LDで示す方向(縦方向)を意味し、「幅方向」とは図中にWDで示す方向(左右方向)を意味し、前後方向と幅方向とは直交するものである。
・「上下方向とは、サイドシール部が形成されることによってウエスト開口及び左右一対の脚開口が形成されたパンツタイプ使い捨ておむつにおいて、図6、14及び15に符号VEで示す方向(縦方向)、具体的にはウエスト開口の中心と、内装体の中心とを結ぶ直線方向、を意味する。
・「展開状態」とは、収縮(弾性部材による収縮等、あらゆる収縮を含む)や弛み無く平坦に展開した状態を意味する。
・「伸長率」は、自然長を100%としたときの値を意味する。例えば、伸長率が200%とは、伸長倍率が2倍であることと同義である。
・「目付け」は次のようにして測定されるものである。試料又は試験片を予備乾燥した後、標準状態(試験場所は、温度23±1℃、相対湿度50±2%)の試験室又は装置内に放置し、恒量になった状態にする。予備乾燥は、試料又は試験片を温度100℃の環境で恒量にすることをいう。なお、公定水分率が0.0%の繊維については、予備乾燥を行わなくてもよい。恒量になった状態の試験片から、試料採取用の型板(100mm×100mm)を使用し、100mm×100mmの寸法の試料を切り取る。試料の重量を測定し、100倍して1平米あたりの重さを算出し、目付けとする。
・「吸水量」は、JIS K7223-1996「高吸水性樹脂の吸水量試験方法」によって測定する。
・「吸水速度」は、2gの高吸収性ポリマー及び50gの生理食塩水を使用して、JIS K7224‐1996「高吸水性樹脂の吸水速度試験法」を行ったときの「終点までの時間」とする。
・「不織布の伸び率」は、ISO 9073-3をもとにJIS B 7721に規定する精度がある定速伸長形引張試験機を使用して、一定速度で試料に一定量の荷重を加え、「引張強さ及び伸び率」の試験を行い測定する。
・試験や測定における環境条件についての記載が無い場合、その試験や測定は、標準状態(試験場所は、温度23±1℃、相対湿度50±2%)の試験室又は装置内で行うものとする。
・各部の寸法は、特に記載が無い限り、自然長状態ではなく展開状態における寸法を意味する。
Claims (9)
- 前身頃と、後身頃と、ウエスト開口及び一対の脚開口とを有し、
前記前身頃の内面の両側部と前記後身頃の内面の両側部とが重ね合わされて溶着された一対のサイドシール部を有し、
前記サイドシール部は、溶着部が間隔を空けて所定のパターンで配列された部分である、使い捨て着用物品であって、
前後方向に細長く延びた形状の第1溶着部と不溶着部とが前後方向に交互に繰り返す第1列が、前記サイドシール部における最も幅方向の内側に設けられ、
前後方向に細長く延びた形状の第2溶着部が前後方向に間隔を空けて連なる第2列が、前記第1列の幅方向の外側に、前後方向に連続する不溶着帯を介して隣接するように設けられ、
前記第2溶着部が、前記不溶着部の幅方向の外側に位置するように、前記第1溶着部及び前記第2溶着部が互い違いに配置された、
ことを特徴とする使い捨て着用物品。 - 前記第1溶着部は、前後方向の中間部が前記サイドシール部の最も幅方向の内側に位置し、前記中間部から前後方向の両側に向かうにつれて幅方向の外側に位置するように延びた形状を有する、
請求項1記載の使い捨て着用物品。 - 前記第1溶着部は弧状をなしており、
前記第1溶着部の両端の接線方向に前記第2溶着部が存在する、
請求項2記載の使い捨て着用物品。 - 前記第1溶着部は弧状をなしており、
前記第1溶着部の接線の方向と幅方向とのなす角が30~90度である、
請求項1~3のいずれか1項に記載の使い捨て着用物品。 - 前記第1溶着部の前後方向の寸法は0.5~2.0mmであり、
前記第1溶着部の幅方向の寸法は、前記第1溶着部の前後方向の寸法の0.1~0.8倍であり、
前記不溶着部の前後方向の最小寸法は1.0~2.5mmであり、
前記第2溶着部の前後方向の寸法は、前記不溶着部の前後方向の最小寸法の0.2~1.0倍であり、
前記第2溶着部の幅方向の寸法は、前記第2溶着部の前後方向の寸法の0.2~0.6倍であり、
前記第2溶着部の前後方向の中央は、前記不溶着部の前後方向の中央を通り幅方向に延びる直線上に位置しており、
前記不溶着帯の幅方向の最小寸法は、前記不溶着部の前後方向の最小寸法の0.1~0.6倍である、
請求項1~4のいずれか1項に記載の使い捨て着用物品。 - 第3溶着部が前後方向に間隔を空けて連なる第3列が、前記第1列の幅方向の外側に、前記不溶着帯を介して隣接するように設けられ、
前記第2溶着部と前記第3溶着部とは離間しており、
前記第3溶着部の面積は、前記第1溶着部の面積及び前記第2溶着部の面積よりも大きく、
前記第1溶着部とこれに最も近い前記第2溶着部との最小間隔は、前記第1溶着部とこれに最も近い前記第3溶着部との最小間隔、並びに前記第2溶着部とこれに最も近い前記第3溶着部との最小間隔よりも短い、
ことを特徴とする請求項1~5のいずれか1項に記載の使い捨て着用物品。 - 前記第2溶着部の幅方向の内側の端と前記第3溶着部の幅方向の内側の端とが前後方向に沿う一直線上に並ぶか、又は
前記第3溶着部の幅方向の内側の端よりも幅方向の外側に、前記第2溶着部の幅方向の内側の端が位置する、
ことを特徴とする請求項6記載の使い捨て着用物品。 - 前記第3溶着部の幅方向の内側の端よりも幅方向の内側に、前記第2溶着部の幅方向の外側の端が位置する、
請求項6又は7記載の使い捨て着用物品。 - 前記前身頃の両側部及び前記後身頃の両側部は、それぞれ複数のシートが積層された部分であり、
前記サイドシール部は、前記シートの積層数が異なる複数の領域が前後方向に並んでおり、
前記第3溶着部の幅方向の長さが、前記シートの積層枚数が多い領域より前記シートの積層枚数が少ない領域の方が長い、
請求項6~8のいずれか1項に記載の使い捨て着用物品。
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Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0428363A (ja) | 1990-05-23 | 1992-01-30 | Daio Paper Corp | パンツタイプ紙おむつ、およびその製造方法と装置 |
JPH0734814U (ja) * | 1993-12-10 | 1995-06-27 | ユニ・チャーム株式会社 | 使い捨てパンツ型おむつ |
JPH11332913A (ja) | 1998-05-28 | 1999-12-07 | Daio Paper Corp | パンツ型おむつにおける弾性部材取付方法および装置 |
JP2002035029A (ja) | 2000-07-21 | 2002-02-05 | Daio Paper Corp | 伸縮性シートの製造方法およびこれを用いた紙おむつ |
JP2002178428A (ja) | 2000-12-11 | 2002-06-26 | Daio Paper Corp | 伸縮性シートの製造方法およびこれを用いた紙おむつ |
JP2002273808A (ja) | 2001-03-16 | 2002-09-25 | Daio Paper Corp | 伸縮性シートの製造方法およびこれを用いた紙おむつ |
JP2015096192A (ja) | 2013-10-11 | 2015-05-21 | ユニ・チャーム株式会社 | 使い捨てのパンツ型着用物品 |
JP2016047307A (ja) * | 2015-11-30 | 2016-04-07 | 王子ホールディングス株式会社 | パンツ型使い捨ておむつ |
JP2017063943A (ja) * | 2015-09-29 | 2017-04-06 | 大王製紙株式会社 | パンツタイプ使い捨ておむつ |
JP2018139718A (ja) | 2017-02-27 | 2018-09-13 | 王子ホールディングス株式会社 | パンツ型使い捨ておむつ |
JP2021053231A (ja) | 2019-09-30 | 2021-04-08 | 大王製紙株式会社 | 吸収性物品 |
-
2021
- 2021-09-17 JP JP2021152491A patent/JP2023044452A/ja active Pending
-
2022
- 2022-03-24 WO PCT/JP2022/014100 patent/WO2023042457A1/ja active Application Filing
- 2022-03-24 KR KR1020237030420A patent/KR20240056455A/ko unknown
- 2022-03-24 CN CN202280022280.9A patent/CN116997311A/zh active Pending
- 2022-03-24 US US18/551,735 patent/US20240050289A1/en active Pending
- 2022-03-30 TW TW111112148A patent/TW202312957A/zh unknown
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0428363A (ja) | 1990-05-23 | 1992-01-30 | Daio Paper Corp | パンツタイプ紙おむつ、およびその製造方法と装置 |
JPH0734814U (ja) * | 1993-12-10 | 1995-06-27 | ユニ・チャーム株式会社 | 使い捨てパンツ型おむつ |
JPH11332913A (ja) | 1998-05-28 | 1999-12-07 | Daio Paper Corp | パンツ型おむつにおける弾性部材取付方法および装置 |
JP2002035029A (ja) | 2000-07-21 | 2002-02-05 | Daio Paper Corp | 伸縮性シートの製造方法およびこれを用いた紙おむつ |
JP2002178428A (ja) | 2000-12-11 | 2002-06-26 | Daio Paper Corp | 伸縮性シートの製造方法およびこれを用いた紙おむつ |
JP2002273808A (ja) | 2001-03-16 | 2002-09-25 | Daio Paper Corp | 伸縮性シートの製造方法およびこれを用いた紙おむつ |
JP2015096192A (ja) | 2013-10-11 | 2015-05-21 | ユニ・チャーム株式会社 | 使い捨てのパンツ型着用物品 |
JP2017063943A (ja) * | 2015-09-29 | 2017-04-06 | 大王製紙株式会社 | パンツタイプ使い捨ておむつ |
JP2016047307A (ja) * | 2015-11-30 | 2016-04-07 | 王子ホールディングス株式会社 | パンツ型使い捨ておむつ |
JP2018139718A (ja) | 2017-02-27 | 2018-09-13 | 王子ホールディングス株式会社 | パンツ型使い捨ておむつ |
JP2021053231A (ja) | 2019-09-30 | 2021-04-08 | 大王製紙株式会社 | 吸収性物品 |
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