WO2015122084A1 - 使い捨てパンツ型おむつ - Google Patents

使い捨てパンツ型おむつ Download PDF

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Publication number
WO2015122084A1
WO2015122084A1 PCT/JP2014/082472 JP2014082472W WO2015122084A1 WO 2015122084 A1 WO2015122084 A1 WO 2015122084A1 JP 2014082472 W JP2014082472 W JP 2014082472W WO 2015122084 A1 WO2015122084 A1 WO 2015122084A1
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WO
WIPO (PCT)
Prior art keywords
outer cover
diaper
lateral direction
elastic
sheet
Prior art date
Application number
PCT/JP2014/082472
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
大坪　俊文
Original Assignee
ユニ・チャーム株式会社
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Filing date
Publication date
Application filed by ユニ・チャーム株式会社 filed Critical ユニ・チャーム株式会社
Publication of WO2015122084A1 publication Critical patent/WO2015122084A1/ja

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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
    • A61F13/51—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
    • A61F13/51456—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its properties
    • A61F13/51464—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its properties being stretchable or elastomeric
    • 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
    • A61F13/51474—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its structure
    • A61F13/51476—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its structure being three-dimensional, e.g. embossed, textured, pleated, or with three-dimensional features, like gathers or loops
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/539—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterised by the connection of the absorbent layers with each other or with the outer layers

Definitions

  • This invention relates to a disposable pants-type diaper.
  • a disposable pant-type diaper is formed of a pant-type member and a separate pad-like body fluid-absorbing member.
  • a pants-type diaper in which a gap is formed between the pants-type member and the body fluid-absorbing member in the crotch region of the pants-type member is also known.
  • Patent Document 1 the diaper described in Japanese Patent No. 3579905 (Patent Document 1) says that a space is formed between the cover body and the absorber when the cover body is in the same state as when worn. Is.
  • the disposable pants described in Japanese Patent No. 3124423 have a stretchable pant member and a pad member, and a gap is formed between the pant member and the pad member in the crotch region.
  • a laminate of a stretchable nonwoven fabric and a stretchable and moisture-permeable plastic film is used for the pant member.
  • a laminate of a stretchable nonwoven fabric and a stretchable and moisture permeable plastic film is also used for the back sheet of the pad member.
  • a gap is formed between a pant-type member and a body fluid-absorbing member such as a pad member or an absorber attached to the inside of the pant-type member
  • a body fluid-absorbing member such as a pad member or an absorber attached to the inside of the pant-type member
  • the body fluid absorbent member may be difficult to see from the outside of the pant-type member, that is, difficult to see through. This has the effect of being able to relieve the impression of a third party that the wearer of a disposable diaper seems to be wearing a diaper.
  • An object of the present invention is to provide an improved disposable pants-type diaper so that the body fluid absorbing structure attached to the inside of the pant-type outer cover cannot be easily seen through from the outside of the outer cover. is there.
  • the present invention for solving the above problems includes a pant-type outer cover having a longitudinal direction and a lateral direction orthogonal to each other, and having a front waist region, a rear waist region, a crotch region, an inner surface and an outer surface, and the inner surface And improving the disposable pants-type diaper including the body fluid absorbing structure extending from the crotch region to the front waist region and the rear waist region.
  • the outer cover includes an elastic member that can be elastically contracted in the lateral direction, and an inelastic sheet that forms at least one of the inner surface and the outer surface and does not elastically extend in the lateral direction. And when the elastic member contracts, a large number of gathers are formed in the non-elastic sheet.
  • the body fluid absorbing structure has an outer surface side facing the inner surface of the outer cover and an inner surface side opposite to the outer surface side, and the outer surface side includes the front waist region, the rear waist region, and the crotch of the outer cover.
  • At least a portion and both side portions in the lateral direction are in a non-joined state, and the portion and both side portions are connected in the non-joined state in the lateral direction.
  • the body fluid absorption structure in the disposable pants-type diaper has both end portions joined to the inner surfaces of the front waist region and the rear waist region of the outer cover, while the portion between both end portions is Since at least a part of the central portion and both side portions are in a non-bonded state with respect to the inner surface of the crotch region of the outer cover, a gap may be generated between the non-bonded portion and the outer cover. Further, the outer cover elastically contracts in the lateral direction, whereby a gather is formed on at least one of the outer surface and the inner surface.
  • the body fluid absorbing structure is outside the outer cover due to the gap between the outer cover and the body fluid absorbing structure and the gathers formed on the outer cover. It is difficult to see through from the outside or it is difficult to recognize its presence from the outside of the outer cover.
  • FIG. 1 The perspective view of a disposable pants type diaper.
  • deployment diaper obtained from the diaper of FIG.
  • wire cut surface of FIG. (1) is an enlarged view of part a.
  • (2) is a figure which shows a state when the part a contracts.
  • seat The fragmentary sectional view of the outer cover which shows an example of an embodiment.
  • (1) is a longitudinal cross-sectional view
  • (2) is a cross-sectional view taken along the line bb in (1).
  • FIG. 1 is a perspective view of an infant diaper 10 which is an example of a disposable pants-type diaper according to the present invention, and a part thereof is shown enlarged.
  • the diaper 10 includes a pant-type outer cover 15 having a front waist region 12, a rear waist region 13, and a crotch region 14.
  • the outer cover 15 has a waist opening 16 and a pair of leg openings 17 defined by joining the front waist region 12 and the rear waist region 13 at the side edge portions 12a and 13a.
  • Ribbon-shaped leg elastic members 11 are attached to both sides of the crotch region 14 so as to be elastically contractible along the peripheral edge portions of the pair of leg openings 17 (see FIG. 2).
  • the outer cover 15 has an inner surface 18 that faces the skin of a diaper wearer (not shown), and an outer surface 19 that faces a diaper wearer's clothes (not shown).
  • a pad-like body fluid absorbing structure 20 is attached to the inner surface 18.
  • characters 2 and graphics 3 for representing the size and the like of the diaper 10 are printed as necessary.
  • the outer cover 15 as a whole is formed so as to be elastically contractible in the lateral direction B, in other words, in the direction around the waist, but usually does not have extensibility in the longitudinal direction A.
  • the outer cover 15 is in an elastically contracted state, that is, in an elastically relaxed state.
  • the diaper 10 in FIG. 1 is also configured so that the front waist region 12 and the rear waist region 13 are moved in the front-rear direction (lateral direction) by applying a force D so that the presence of the waist opening 16 and the leg opening 17 can be clearly shown. In a direction perpendicular to B).
  • the magnitude of the force D is merely to separate the front waist region 12 and the rear waist region 13 which were overlapped immediately after manufacturing the diaper 10 as shown in the figure, and the outer cover 15 is elastically extended. I will not let you.
  • a portion 14 a of the crotch region 14 is a lowermost portion in the longitudinal direction A of the diaper 10.
  • a line PP is a vertical center line that bisects the dimension in the lateral direction B of the diaper 10 and passes through the lowermost part 14a.
  • the partial enlarged view in FIG. 1 shows a postscript gather 40 formed on substantially the entire outer surface 19 of the outer cover 15.
  • the gather 40 is formed from a plurality of concave stripes 40a and convex stripes 40b arranged alternately in the longitudinal direction A when the nonwoven fabric of thermoplastic synthetic fibers defining the outer surface 19 of the outer cover 15 contracts in the transverse direction B.
  • the concave stripes 40a and the convex stripes 40b include those that extend continuously in the longitudinal direction A and those that extend intermittently.
  • FIG. 2 is a partially broken plan view of the state in which the outer cover 15 is elastically extended in the lateral direction B of FIG. 1 by unbonding the side edges 12a and 13a in the diaper 10 of FIG.
  • an outer cover 15 having a front waist region 12, a rear waist region 13, and a crotch region 14 includes a seat 30 that can repeat elastic expansion and contraction in the lateral direction B.
  • FIG. The sheet 30 is in an elastically contracted state.
  • the leg elastic members 11 positioned at both side edges 14 b of the crotch region 14 can elastically contract in the circumferential direction of the leg opening 17, and when the diaper 10 is worn, the peripheral edge of the leg opening 17.
  • the part fits elastically around the wearer's leg. Therefore, the rear side portion 20 b of the body fluid absorption structure 20 that is not joined to the inner surface of the crotch region 14 does not go out of the leg opening 17.
  • the outer cover 15 and the leg elastic member 11 are joined to each other in a stretched state, for example, with a hot melt adhesive.
  • the body fluid absorbing structure 20 extends from the crotch region 14 to the front waist region 12 and the rear waist region 13 on the longitudinal center line PP.
  • the body fluid absorbing structure 20 is non-extensible in the vertical direction A and the horizontal direction B except for a leak-proof cuff 41 described later, and has a front end portion 21 and a rear end portion 22.
  • the front end 21 is joined to the waist opening edge 12b in the front waist region 12 of the outer cover 15 with, for example, a hot melt adhesive 5
  • the rear end 22 is joined to the waist opening edge 13b in the rear waist region 13, for example, with a hot melt adhesive. 5 is joined.
  • Belt members 23 that can be elastically contracted in the lateral direction B are positioned at the waist opening edges 12b and 13b, and the front end portion 21 and the rear end portion 22 of the body fluid absorbing structure 20 are sandwiched between the outer ends.
  • the inner surface 18 of the cover 15 is joined with the hot melt adhesive 5, for example.
  • the body fluid absorbing structure 20 also has a front end portion 21 and a rear end portion 22 in which the entirety in the lateral direction B is joined to the inner surface 18 of the outer cover 15, but the dimension E in the longitudinal direction A of the joined portion. 1, E 2 is preferably never exceed 30 mm. Further, the body fluid absorbing structure 20 extends in the longitudinal direction A in FIG. 1 and is located on the longitudinal center line PP in FIG. 2, and the dimension F in the lateral direction B does not exceed 30 mm. It has the center part 20a which exists in a range. At least a part of the central portion 20 a in the longitudinal direction A is not joined to the outer cover 15.
  • the central portion 20a has a dimension of at least 10 mm at the front and rear of the lateral center line QQ extending in the lateral direction B through the lowermost portion 14a of the diaper 10 (see FIG. 1).
  • the range G is not joined to the outer cover 15. Except for this range G, the central portion 20a can have a joint region H with respect to the front waist region 12, the rear waist region 13, and the crotch region 14 as shown in the drawing.
  • the body fluid absorbing structure 20 is in a state in which both side portions 20 b except the central portion 20 a are not joined to the outer cover 15 in the entire width extending in the lateral direction B.
  • the inner surface 18 of the outer cover 15 tends to be in close contact with the skin of the wearer except for a portion overlapping the body fluid absorbing structure 20 in plan view.
  • the both side portions 20b composed of the side edges 25 and the adjacent portions in the body fluid absorbing structure 20 do not adhere to the inner surface 18 of the outer cover 15 or are difficult to adhere, and the diaper 10
  • the side edges 25 and the side portions 20b of the body fluid absorbing structure 20 do not appear as clear lines or bulges on the outer surface 19 of the outer cover 15, and a third party saw the diaper 10.
  • the presence of the body fluid absorbing structure 20 is inconspicuous and it is difficult to recognize the presence. Therefore, for the wearer, it is difficult for a third party to realize that he is wearing a diaper, and the wearer can appear to be wearing simple pants.
  • the range in which the central portion 20 a of the body fluid absorption structure 20 is not joined to the outer cover 15, for example, the range G is the both side portions 20 b that are not joined to the outer cover 15. And the entire width of the body fluid absorbing structure 20 is not joined to the outer cover 15. Therefore, the worn diaper 10 crosses the body fluid absorbing structure 20 between the outer cover 15 and the body fluid absorbing structure 20 even when the outer cover 15 is in close contact with the wearer's skin over a wide range.
  • the gap which enables the flow of the air in the horizontal direction B is formed, and the inside of the diaper 10 is less stuffy and does not deteriorate the feeling of wearing.
  • FIG. 3 and 4 are views showing the section taken along the line III-III and the section taken along the line IV-IV in FIG. 2, and FIG. 3 also shows a partially enlarged view thereof.
  • an enlarged view of the portion a of the outer cover 15 is shown as (1)
  • an enlarged view of the portion a in the contracted state that is, the state of the diaper 10 in FIG. 1 is shown as (2).
  • the state of the cross section in the lateral direction B of the outer cover 15 changes between the state in (1) and the state in (2) in FIG.
  • the sheet 30 forming the outer cover 15 defines a flat inner surface 18 that faces the body fluid absorbing structure 20 and is elastically contractible in the lateral direction B, and the sheet 30.
  • the outer surface 19 is demarcated and is flat when the inner layer portion 31 is in the extended state (see (1) in FIG. 4), but is gathered when in the contracted state (see (2) in FIG. 4). And an outer layer portion 32 that forms The gather 40 corresponds to the gather 40 of the diaper 10 in FIG.
  • the inner layer portion 31 is a portion formed by an elastic sheet, and the elastic sheet contains 20-60% by mass of elastic yarn and 80-40% by mass of non-elastic yarn, and per unit area. Nonwoven fabrics having a mass in the range of 10-40 g / m 2 and polyurethane resin films having a thickness in the range of 0.001-0.05 mm can be included. If the elastic yarn contained in the inner layer portion 31 is a polyurethane elastic yarn, the inner layer portion 31 is given hygroscopicity and acts to reduce the stuffiness when the diaper 10 is worn.
  • the inelastic yarn contained in the inner layer portion 31 includes fibers formed of a thermoplastic synthetic resin such as polyethylene, polypropylene, nylon, and polyester.
  • a non-extensible nonwoven fabric can be used for the outer layer portion 32 in the illustrated example.
  • the nonwoven fabric include a spunbond nonwoven fabric, a meltblown nonwoven fabric, a spunbond-meltblown-spunbond nonwoven fabric, etc., which is formed of a thermoplastic synthetic fiber having a fineness of 1-8 dtex and has a mass of 10-30 g / m 2 .
  • the thermoplastic synthetic fiber include fibers formed of a thermoplastic synthetic resin such as polyethylene, polypropylene, nylon, and polyester, and composite fibers formed of these thermoplastic synthetic resins.
  • the thickness of the sheet 30 and the plastic film or non-woven fabric used therein is 20 cm 2 for the contact area with respect to the measurement specimen collected from them, and 3 gf / cm 2 for the measurement specimen.
  • This is a value measured using a dial thickness gauge capable of applying a contact pressure, for example, FS-60DS manufactured by Daiei Scientific Instruments.
  • the area of the contact can be changed according to the size of the measurement specimen.
  • a core material 37 formed by covering a body fluid absorbing material 36 such as pulverized pulp or a mixture of pulverized pulp and superabsorbent polymer particles with a liquid-permeable wrapping sheet (not shown). Is further covered with a liquid-permeable sheet 38 and a liquid-impermeable sheet 39.
  • the liquid-permeable sheet 38 covers the inner surface of the core material 37, that is, the surface facing the wearer's skin, and allows the excreted body fluid to permeate toward the core material 37. Formed by a film.
  • the liquid-impermeable sheet 39 covers the outer surface of the core member 37, that is, the surface facing the wearer's clothes (not shown) to prevent body fluid absorbed by the core member 37 from leaking out of the core member 37.
  • a liquid-impermeable and moisture-permeable plastic film 39a a liquid-impermeable and moisture-permeable plastic film 39a and a hot melt adhesive or the like on the outer surface of the plastic film 39a
  • the liquid-impervious and moisture-permeable plastic film has a liquid-impervious property in which the water pressure specified in JIS L 1092B is 1000 mm ⁇ H 2 O or more, and at the same time, in JIS Z 0208 It means that having a moisture permeability of a prescribed moisture permeability of 3000 g / m 2 ⁇ day or more.
  • the liquid-impervious and moisture-permeable plastic film 39a is a conventional one in the art, and one example thereof is a thickness containing fine particles such as barium sulfate and calcium carbonate of 0.01-0. There is a 03 mm polyethylene film.
  • the nonwoven fabric bonded to the liquid-impervious and moisture-permeable plastic film 39a is not indispensable, but is useful as a surface protective material for the plastic film 39a.
  • the plastic film 39a is prevented from being torn or the plastic film 39a from being damaged.
  • the non-woven fabric one formed of thermoplastic synthetic fiber having a fineness of 1-8 dtex and having a mass of 7-20 g / m 2 is used.
  • the front end portion 21 and the rear end portion 22 of the body fluid absorbing structure 20 are formed by overlapping a liquid-permeable sheet 38 and a liquid-impermeable sheet 39 that extend from the core material 37. It is a portion that is formed by joining together with a melt adhesive (not shown) and does not include the core material 37. However, the front end portion 21 and / or the rear end portion 22 is also a portion that may be formed mostly or entirely by the liquid-impermeable sheet 39.
  • a core member 37 is provided at a portion between the front end portion 21 and the rear end portion 22.
  • the body fluid absorption structure 20 is in a non-joined state and can be separated from the outer cover 15 at least at the lowermost portion 14a (see FIG. 1) of the crotch region 14, and the body cover and the body fluid absorption structure 20 are separated from each other. There may be a gap 45 between them.
  • leak-proof cuffs 41 are formed on both sides in the lateral direction B of the body fluid absorbing structure 20.
  • the leak-proof cuff 41 is preferably formed of a liquid-impervious sheet or a water-repellent sheet, but in the illustrated example, the liquid-impervious sheet 39 is formed as a liquid-impervious sheet 39.
  • the wet plastic film 39a and the non-woven fabric 39b covering the plastic film 39a are formed by using portions extending in the lateral direction B from both side portions of the core member 37, respectively. However, the non-woven fabric 39b of the portion is folded as shown in the illustrated example at a portion that becomes the top portion 42 of the leak-proof cuff 41.
  • An elastic member 43 extending in the longitudinal direction A is attached in an extended state inside the top portion 42 of the leak-proof cuff 41.
  • the elastic member 43 contracts in the longitudinal direction A so that the leak-proof cuff 41 is attached to the body fluid absorbing structure 20.
  • the gap 45 between the outer cover 15 and the body fluid absorbing structure 20 can be increased by applying a force in the lifting direction to the body fluid absorbing structure 20.
  • the inner surface 18 of the portion facing the body fluid absorbing structure 20 is flat and the gathers 40 are formed on the outer surface 19.
  • the leg elastic member 11 is preferably narrow so as not to prevent the gather 40 from being formed on the outer cover 15.
  • the leg elastic member 11 can be used in a state where a ribbon-like member having a width of 15-30 mm is overlapped and joined to the outer cover by a width of 3-5 mm.
  • FIG. 5 is a diagram illustrating a part of the manufacturing process of the sheet 30 used for the outer cover 15.
  • an elastic web 531 having a width W 0 for obtaining the inner layer portion 31 of the sheet 30 is continuously supplied in the machine direction MD.
  • the elastic web 531 has an upper surface 517 and a lower surface 518, and these both surfaces 517 and 518 are flat without gathers.
  • the elastic web 531 can also be elastically extended in the machine direction MD.
  • step 502 the required ratio length Z 0 of the elastic web 531, such as its extends in the machine direction MD so as to be 1.5-3 times the length Z 0, the extension web 531a having a width W 1 obtain.
  • the nonwoven fabric web 532 used as the outer layer portion 32 of the sheet 30 is supplied, and the hot melt adhesive 535 is applied to one side of the nonwoven fabric web 532 using an applicator 550 such as a curtain coater.
  • the non-woven web 532 is a non-elastic web that does not stretch elastically when it is fed in the machine direction MD, and is bonded to the upper surface 517 of the stretchable web 531a via a hot melt adhesive 535 so as to stretch the composite web 531b.
  • the hot melt adhesive 535 is applied such that a plurality of intermittent or continuous lines 556 are formed in the machine direction MD, and the lines 556 are aligned with a gap 557 in the cross direction CD.
  • step 504 by releasing the extension web 531a from the extended operation to it, elastically shrunk in the machine direction MD elongation composite web 531b, the composite web 530 having a width W 2 a continuum of sheet 30 obtain.
  • the composite web 530 has an upper surface 519 formed by the nonwoven web 532 and a lower surface 518 formed by the elastic web 531.
  • gathers 540 are formed in the non-woven web 532 as the non-woven web 532 is deformed so that its length is apparently reduced.
  • the portion of the non-woven web 532 that is joined to the elastic web 531 with the hot melt adhesive 535 is a fine gather 540a that includes the ridge 40b (see FIGS.
  • the lower surface 518 of the elastic web 531 in the composite web 530 is not as large as the lower surface 518 of the elastic web 531 supplied in step 501, but is flat.
  • Composite web 530 in which the machine direction MD is used such that the transverse direction B of the diaper 10, in a state in which the length Z 2 is elastically stretched to the required stretch ratio, for example the contracted state 2 is attached to the lower surface 518 of the elastic web 531 while the length of the composite web 530 is extended to 1.5-3 times, and the belt member 23 is attached to the composite web 530. It is attached in a state where it has been stretched to the same magnification as that of, or a magnification higher than that. Next, a notch (not shown) having a shape corresponding to the crotch region 14 in the outer cover 15 of FIG. 2 is formed in the composite web 530.
  • a leg elastic member 11 (see FIG.
  • the composite web 530 can be attached with the body fluid absorbing structure 20 after making a notch when the composite web 530 is in the extended state and attaching the leg elastic member 11.
  • a continuous body of the diaper 10 shown in FIG. 2 can be obtained from the composite web 530.
  • the continuum running in the machine direction MD is folded in the cross direction CD so that the body fluid absorbing structures 20 are overlapped, and joined at the portions that become the side portions 12a and 13a of the diaper 10. Then, the individual diaper 10 can be obtained by cutting the continuous body at a required site.
  • the meaning that the surface such as the inner surface 18 is flat means that the range of 1 cm ⁇ 1 cm arbitrarily selected from the surface and the cross section in the thickness direction of the range is 10 times larger.
  • a gather for example, gather 40 (see FIGS. 1 and 4)
  • the ridge 40b means a state where both cannot be found.
  • the meaning that the sheet or web and the yarn used to make the sheet or web are elastically stretchable is as follows.
  • a specimen having a length of 50 mm and a width of 10 mm is taken from the sheet or web, and a test bundle is prepared by bundling five pieces of 50 mm in length from the yarn for making the sheet or web. Both ends of the bundle are gripped by 10 mm each by the chuck of the tensile tester, and the dimension L 0 between the chucks is extended to twice as high as 50 mm / min. After decompression, the specimen or test bundle immediately removed from the chuck and allowed to stand for 60 seconds, determine the length L after leaving the portion corresponding to the dimension L 0.
  • the yarn can be elastically stretchable.
  • An elastically extensible sheet, web, or thread may be referred to as an elastic member, elastic web, elastic thread, or elastic member, elastic web, or elastic thread. If the yarn is crimped, place the crimped yarn along a straight line, determine the linear distance between the ends of the yarn in the crimped state, and measure the distance as the dimension. Let L be 0 . When there are variations in dimension L between the yarn five compares the dimension L 0 by the average value of the dimension L.
  • FIG. 6 is a diagram illustrating another example of the manufacturing process of the sheet 30.
  • an elastic web 631 having a width W 0 for obtaining the inner layer portion 31 in the sheet 30 is continuously supplied in the machine direction MD.
  • the elastic web 631 can be elastically extended in the cross direction CD with respect to the machine direction MD.
  • the width W 0 is required magnification of elastic web 631, for example, widened so that 1.5-3 times the width W 0, to obtain a widening web 631a with a width W 1.
  • Widening web 631a has a length Z 1 corresponding to the length Z 0 in the elastic web 631.
  • a non-woven web 632 that is an inelastic web for use as the outer layer portion 32 of the sheet 30 is supplied, and a hot melt adhesive 635 is applied to the non-woven web 632 using a coating machine 650 such as a curtain coater.
  • the hot melt adhesive 635 is applied such that a plurality of intermittent or continuous lines 656 are formed in the machine direction MD, and the lines 656 are arranged with a gap 657 having substantially the same dimension in the cross direction CD.
  • the nonwoven fabric web 632 and the widened web 631a are joined via a hot melt adhesive 635 to obtain a widened composite web 631b.
  • step 604 by releasing the widening web 631a from widening operation against it, the composite web the widening composite web 631b elastically shrunk in the cross direction CD, have a width W 2 a continuous body of a sheet-like member 30 630 is obtained.
  • Composite web 630 has an upper surface 619 defined by nonwoven web 632 and a lower surface 618 defined by elastic web 631.
  • gathers 640 are formed in the nonwoven fabric web 632 as the nonwoven fabric web 632 forming the widened composite web 631 b is deformed so that its width is apparently reduced.
  • a portion of the nonwoven fabric web 632 that is bonded and fixed to the elastic web 631 via the line 656 of the hot melt adhesive 635 becomes the recess 40 a (see FIGS. 1 and 4).
  • the portion located in the gap 657 formed by the 656 shrinks in the cross direction CD and rises in the thickness direction of the nonwoven fabric web 632 to form a ridge 40b (see FIGS. 1 and 4).
  • the composite web 630 is used so that the cross direction CD becomes the lateral direction B of the diaper 10, and the width of the composite web 630 is expanded in a state where the width is elastically widened to a required widening magnification.
  • 2 is attached to the lower surface 618 of the elastic web 631, and the belt member 23 is attached to the composite web 630 with a widening magnification. Attach it to the same magnification.
  • a continuation of the diaper 10 shown in FIG. 2 is obtained from the composite web 630 by notching both sides of the composite web 630 so as to have a shape corresponding to the crotch region 14 in the outer cover 15 of FIG. Can do.
  • the composite web 630 can also be cut out on both sides prior to attaching the body fluid absorbing structure 20.
  • the individual diaper 10 can be obtained by cutting the obtained continuous body at a required position in the continuous body while traveling in the machine direction MD.
  • the elastic web 631 is folded so that the lower surface 618 of the elastic web 631 becomes the inner surface 18 and the upper surface 619 formed by the nonwoven fabric web 532 becomes the outer surface 19, and both sides of the diaper 10 are joined to obtain the diaper 10.
  • FIG. 7 is a diagram showing an ultrasonic welding machine 750 that can be used in place of the coating machine 550 in step 503 in FIG. 5 and the coating machine 650 in step 603 in FIG.
  • the ultrasonic welder 750 includes a horn 750a and an anvil 750b.
  • the stretched web 531a and the nonwoven web 532 in FIG. 5 are overlapped and fed between the horn 750a and the anvil 750b while running in the machine direction MD.
  • the horn 750a has a cylindrical shape that rotates in the machine direction MD, and a large number of protrusions 751 that are ultrasonically vibrated are formed on the peripheral surface thereof.
  • the stretched web 531a and the nonwoven fabric web 532 that are overlapped become a stretched composite web 531b by welding the portions of the horn 750a that have received the action of the projection 751 on the anvil 750b.
  • the sheet 30 in the outer cover 15 uses the composite web 530 as illustrated in FIGS.
  • a body 45 is formed by forming a gap 45 between the outer cover 15 and the body fluid absorbing structure 20.
  • the absorbent structure 20 is difficult to see through from the outside of the outer cover 15, and is inconspicuous on the appearance of the diaper 10.
  • the outer surface 19 of the outer cover 15 is also formed with the gathers 40.
  • the fibers forming the outer layer portion 32 of the sheet 30 form the ridges 40b of the gathers 40, and bodily fluids.
  • the body fluid absorption structure 20 is difficult to see through, and its presence is not conspicuous from the outside of the outer cover 15.
  • the diaper 10 when the liquid-impervious plastic film 39 a used in the body fluid absorbing structure 20 rubs the inner surface 18 of the outer cover 15, an unpleasant scratching sound unique to the plastic film may be generated.
  • the diaper 10 can be in a state in which the inner surface 18 is in a flat state without gathers even if the gathers 40 are formed on the outer surface 19 of the outer cover 15. Unlike a diaper where gathers are formed on the inner and outer surfaces of the cover, it is possible to suppress the generation of scratching sound on the plastic film. Therefore, the diaper 10 is less likely to cause discomfort to the wearer and other persons with an unpleasant sound, even before being worn or being worn.
  • FIG. 8 is a partial cross-sectional view of the outer cover 15 in a contracted state for showing an example of the embodiment, where (1) shows a cross section in the longitudinal direction A of the diaper 10 and (2) shows (1). The cross section taken along the line bb is shown.
  • the sheet 30 in the outer cover 15 includes an inner layer portion 31, an outer layer portion 32, and a plurality of thread-like elastic members 50 interposed between the both portions 31 and 32. At least one of the inner layer portion 31 and the outer layer portion 32, for example, the outer layer portion 32 is formed of an inelastic nonwoven fabric, and is inextensible in the lateral direction B.
  • the elastic member 50 is stretched in the transverse direction B, preferably stretched by 1.5-3 times its length when in the contracted state, and at least a hot melt adhesive ( (Not shown).
  • a large number of gathers 40 are formed in the outer layer portion 32 as the elastic member 50 contracts in the lateral direction B.
  • the outer cover 15 may use such a thread-like elastic member 50 as an elastic member that can be elastically contracted in the lateral direction B.
  • the inner layer portion 31 is formed of a nonwoven fabric that is an inelastic sheet, the elastic member 50 is bonded not to the outer layer portion 32 but to the inner layer portion 31 or to both portions 31, 32, A gather 40 can also be formed in the inner layer portion 31.
  • the outer cover 15 when the gathers 40 are formed in the inner layer portion 31 can be used to conceal the presence of the body fluid absorbing structure 20.
  • a pant-type outer cover having a front waist region, a rear waist region, a crotch region, and an inner surface and an outer surface, and a front waist region, a rear waist region, a crotch region, and the front surface.
  • a disposable pants-type diaper including a body fluid absorption structure extending to a waist region and the rear waist region, wherein the outer cover is an elastic member that can be elastically contracted in the lateral direction, the inner surface, and the outer surface.
  • a non-elastic sheet that forms at least one of the above and does not elastically extend in the lateral direction, and the elastic member is bonded to the non-elastic sheet in an extended state, thereby the elastic member
  • the body fluid absorbing structure has an outer surface facing the inner surface of the outer cover and an inner surface on the opposite side. The outer surface side is joined to the inner surface of at least the front waist region and the rear waist region of the front waist region, the rear waist region, and the crotch region of the outer cover.
  • the inner surface of the crotch region is in a non-bonded state between at least a part of the central part in the lateral direction and both side parts in the lateral direction, and the part and both side parts are in the lateral direction. Are connected in the non-bonded state.
  • the elastic member in the outer cover is an elastic sheet.
  • the elastic sheet is any one of an elastic nonwoven fabric and an elastic plastic film that can be elastically contracted in the lateral direction, and the non-elastic sheet is a non-elastic nonwoven fabric.
  • the gathers are formed in the crotch region.
  • the inner surface of the crotch region is flat.
  • the elastic member in the outer cover is a plurality of thread-like elastic members extending in parallel to each other in the lateral direction, and forms at least one of the outer surface and the inner surface. It is joined to the target sheet in an elastically stretched state.
  • the said part in the said bodily fluid absorption structure is facing the lowest part of the said crotch area in the said outer cover.
  • the central portion of the body fluid absorbing structure is joined to the inner surface of the crotch region in a portion other than the portion and having a lateral dimension not exceeding 30 mm.

Landscapes

  • 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)
PCT/JP2014/082472 2014-02-13 2014-12-09 使い捨てパンツ型おむつ WO2015122084A1 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014025398A JP2015150131A (ja) 2014-02-13 2014-02-13 使い捨てのパンツ型おむつ
JP2014-025398 2014-02-13

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TW (1) TW201538140A (ru)
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017217107A (ja) * 2016-06-03 2017-12-14 ユニ・チャーム株式会社 パンツ型且つ使い捨ての吸収性物品

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008148834A (ja) * 2006-12-15 2008-07-03 Kao Corp パンツ型物品及びその製造方法
JP2009148465A (ja) * 2007-12-21 2009-07-09 Kao Corp パンツ型使い捨ておむつ
JP2012024464A (ja) * 2010-07-27 2012-02-09 Daio Paper Corp パンツタイプ使い捨ておむつ
JP2012210234A (ja) * 2011-03-30 2012-11-01 Daio Paper Corp パンツタイプ使い捨ておむつ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008148834A (ja) * 2006-12-15 2008-07-03 Kao Corp パンツ型物品及びその製造方法
JP2009148465A (ja) * 2007-12-21 2009-07-09 Kao Corp パンツ型使い捨ておむつ
JP2012024464A (ja) * 2010-07-27 2012-02-09 Daio Paper Corp パンツタイプ使い捨ておむつ
JP2012210234A (ja) * 2011-03-30 2012-11-01 Daio Paper Corp パンツタイプ使い捨ておむつ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017217107A (ja) * 2016-06-03 2017-12-14 ユニ・チャーム株式会社 パンツ型且つ使い捨ての吸収性物品

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