WO1996029038A1 - Couche jetable - Google Patents

Couche jetable Download PDF

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Publication number
WO1996029038A1
WO1996029038A1 PCT/US1996/002922 US9602922W WO9629038A1 WO 1996029038 A1 WO1996029038 A1 WO 1996029038A1 US 9602922 W US9602922 W US 9602922W WO 9629038 A1 WO9629038 A1 WO 9629038A1
Authority
WO
WIPO (PCT)
Prior art keywords
section
side edge
oblique side
ear
fastening means
Prior art date
Application number
PCT/US1996/002922
Other languages
English (en)
Inventor
Yukio Heki
Takashi Hiuke
Original Assignee
The Procter & Gamble Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by The Procter & Gamble Company filed Critical The Procter & Gamble Company
Priority to CA002213802A priority Critical patent/CA2213802C/fr
Priority to EP96910363A priority patent/EP0814740A4/fr
Priority to MX9707210A priority patent/MX9707210A/es
Priority to AU53576/96A priority patent/AU5357696A/en
Priority to US08/913,486 priority patent/US5906008A/en
Publication of WO1996029038A1 publication Critical patent/WO1996029038A1/fr

Links

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
    • A61F13/49007—Form-fitting, self-adjusting disposable diapers
    • A61F13/49009—Form-fitting, self-adjusting disposable diapers with elastic means
    • A61F13/49014—Form-fitting, self-adjusting disposable diapers with elastic means the elastic means is located at the side panels
    • A61F13/49015—Form-fitting, self-adjusting disposable diapers with elastic means the elastic means is located at the side panels the elastic means being elastic panels
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/56—Supporting or fastening means
    • 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
    • A61F13/49007—Form-fitting, self-adjusting disposable diapers
    • A61F13/49009—Form-fitting, self-adjusting disposable diapers with elastic means
    • A61F13/4902—Form-fitting, self-adjusting disposable diapers with elastic means characterised by the elastic material

Definitions

  • the present invention relates to a disposable diaper having an absorbent part, a pair of ear parts projecting in opposite directions from the side edges of one longitudinal end portion of the absorbent part, and one fastening means provided on the oblique side edges of the ear parts, respectively, and capable of effectively distributing tensile forces applied to the absorbent part by the fastening means around the waist and around the legs to prevent the leakage of liquid excrements through spaces between the edges of the disposable diaper and the wearer's waist and legs and of giving comfort to the wearer Background of the Invention
  • a generally known disposable diaper comprises an absorbent part for covering the wearer's crotch, formed by sandwiching an absorbent core between a top sheet and a back sheet, a pair of ear parts projecting in opposite directions from the side edges of one longitudinal end portion of the absorbent part so as to lap around the wearer's waist, and two fastening means provided on the side edges of the ear parts respectively
  • the disposable diaper is put on the wearer in an ordinary manner, and then the fastening means are attached to portions of the absorbent part lapping around the waist, on the opposite sides of the fastening means, respectively, to hold the disposable diaper on the wearer
  • the disposable diaper must fit to the wearer ' s waist and legs so that any spaces through which liquid excrements will leak may not be formed between the disposable diaper and the wearer's waist and legs
  • a disposable diaper disclosed in, for example, Japanese Utility Model Laid-open (Kokai) No 59-73305 has a main part, ear parts projecting in opposite directions from the side edges of the main part, respectively and two fastening means attached to the side edges of the ear parts parallel to the longitudinal axis of the main part respectively, so as to extend obliquely to the transverse edge of the longitudinal end of a portion of the main part on the back side to distribute the tensile forces applied to the mam part by the two fastening means effectively around the waist and the legs
  • the two fastening means are attached to the ear parts, respectively, so as to extend obliquely to the transverse edge of the longitudinal end of a portion of the main part on the back side the fastening means are pulled involuntarily in a direction perpendicular to the side edges of the ear parts because the fastening means are attached to the side edges of the ear parts parallel to the longitudinal axis of the main part, respectively, and consequently, the tensile
  • a first object of the present invention to provide a disposable diaper having an absorbent part provided with fastening means disposed so as to be pulled necessarily obliquely to the axis of the disposable diaper and capable of effectively and directly concentrating tensile forces applied thereto on portions of the absorbent part lapped around the waist and the legs respectively
  • a second object of the present invention is to provide a disposable diaper having an absorbent part provided with fastening means disposed so that tensile forces applied thereto are distributed around the waist and the legs at a desired distribution ratio, respectively
  • a third object of the present invention is to provide a disposable diaper having an absorbent part having leg lapping sections to be lapped around the legs, provided with elastic fitting members, respectively, and fastening means disposed so that the tensile forces applied thereto are concentrated effectively and directly on a portion of the absorbent part to be lapped around the waist and on the elastic fitting members
  • a fourth object of the present invention is to provide a disposable diaper having an absorbent part having a waist lapping section and leg lapping sections to be lapped around the waist and the legs provided with elastic fitting members, respectively, and fastening means disposed so that the tensile forces applied thereto are concentrated effectively and directly on the elastic fitting members
  • a disposable diaper comprises an absorbent part formed by sandwiching an absorbent core between a top sheet and a back sheet so that the absorbent core may corresponds to the wearer's crotch when the disposable diaper is put on the wearer, a pair of ear parts projecting in opposite directions from •the opposite side edges of one longitudinal end portion of the absorbent part, respectively, and one fastening means attached to the side edges of the ear parts, respectively
  • the oblique side edges of the ear parts to which the fastening means are attached respectively are inclined so as to extend at a predetermined angle to the longitudinal center axis of the disposable diaper
  • the fastening means are attached to the ear parts so as to extend perpendicularly to the corresponding oblique side edges, respectively
  • each ear part has a stress relaxing structure, in which a tensile stress smaller than that which is induced in the peripheral portion of the ear part is induced, in a portion thereof other than the peripheral portion, and each ear part has a stress relaxing structure, in
  • a disposable diaper comprises, an absorbent part formed by sandwiching an absorbent core between a top sheet and a back sheet so that the absorbent core may correspond to the wearer's crotch when the disposable diaper is put on the wearer, and having a first waist lapping section and a second waist lapping section contiguous with the first and the second longitudinal end edge respectively, a crotch lapping section extending between the first and the second waist lapping section, a pair of ear parts projecting from the opposite side edges of the first waist lapping section of the absorbent part and one fastening means attached to the oblique side edges of the ear parts, respectively
  • the oblique side edges of the ear parts to which the fastening means are attached, respectively are inclined at a predetermined angle to the longitudinal center axis of the disposable diaper, the fastening means are attached to the ear parts so as to extend perpendicularly to the corresponding oblique side edges, respectively, each ear part
  • a disposable diaper comprises, an absorbent part formed by sandwiching an absorbent core between a top sheet and a back sheet so that the absorbent core may correspond to the wearer's crotch when the disposable diaper is put on the wearer, and having a first waist lapping section and a second waist lapping section contiguous with the first and the second longitudinal end edge respectively, a crotch lapping section extending between the first and the second waist lapping section, elastic leg fastening means extended along the opposite longitudinal side edges of the crotch lapping part, a pair of ear parts projecting from the opposite side edges of the first waist lapping section of the absorbent part, and one fastening means attached to the oblique side edges of the ear parts, respectively
  • the oblique side edges of the ear parts to which the fastening means are attached, respectively are inclined at a predetermined angle to the longitudinal center axis of the disposable diaper, the fastening means are attached to the the ear parts so as
  • the oblique side edges of the ear parts extend at an angle to the longitudinal center axis of the disposable diaper at a predetermined angle
  • the fastening means are attached to the ear parts so as to extend perpendicularly to the corresponding oblique side edges, respectively
  • each ear part has a stress relaxing structure, in which a tensile stress smaller than that which is induced in the peripheral portion of the ear part is induced, in a portion thereof other than the peripheral portion, a portion of the first waist lapping section, extending on the side of the first longitudinal end edge from a first boundary line extending from one end of the elastic waist fastening means on the side of the ear art so as to be tangent to a portion of the stress relaxing structure on the side of the same end of the elastic waist fastening means is a waist lapping component force distributing region in which a component of a tensile force applied to the fastening means acts directly on one end of the elastic waist fastening means, a section of the
  • disposable diaper comprises; an absorbent part formed by sandwiching an absorbent core between a top sheet and a back sheet so that the absorbent core may correspond to the wearer's crotch when the disposable diaper is put on the wearer, and having a first waist lapping section and a second waist lapping section contiguous with the first and the second longitudinal end edge respectively, a crotch lapping section extending between the first and the second waist lapping section; elastic leg fastening means extended along the opposite longitudinal side edges of the crotch lapping part; an elastic waist fastening means extended along the transverse edge of the absorbent part in the first waist lapping section; a pair of ear parts attached to the first waist lapping section of the absorbent part; and one fastening means attached to the oblique side edges of the ear parts, respectively
  • the oblique side edges of the ear parts to which the fastening means are attached, respectively are inclined at a predetermined angle to the longitudinal center axis of
  • the oblique side edges of the ear parts of the disposable diaper in accordance with the present invention are inclined at the predetermined angle to the longitudinal center axis of the disposable diaper, and the fastening means are disposed on the oblique side edges so as to extend substantially perpendicular to the oblique side edges, respectively consequently, each fastening means is pulled invariably in a fixed direction relative to the corresponding oblique side edge of the ear part and appropriate tensile force is distributed to the portions of the absorbent part lapped around the legs
  • the angle as measured counterclockwise from a line parallel to the longitudinal center axis of the disposable diaper to the oblique side edge is in a range defined by 0 ⁇ ⁇ 45 a major part of a tensile force applied to the fastening means can be distributed to the leg lapping section and a minor part of the same can be distributed to the waist lapping section, and a ma j or part of a tensile force applied to the fastening means can be distributed to the waist lapping section and a minor portion of the same can be distributed to the leg lapping section when 45 .
  • the stress relaxing structure of the ear part absorbs the tensile force applied thereto, and the peripheral portion of the ear part transmits the tensile force directly to the absorbent part, so that the tensile force applied to the fastening means can be effectively and directly applied to the waist lapping section and the leg lapping section of the absorbent part.
  • Attachment of the fastening means to the oblique side edge of the ear part in the pulling section overlapping at least part of the first oblique side edge section and the second oblique side edge section defined in positional connection with the absorbent part and the stress relaxing structure of the ear part ensures the application of the tensile force applied to the fastening means to part of the longitudinal end edge of the absorbent part on the side of the first waist lapping section or to part of the edge of the ear part on the side of the transverse center axis of the disposable diaper
  • the tensile force that acts on part of the longitudinal end edge of the absorbent part on the side of the first waist lapping section or on part of the edge of the ear part on the side of the transverse center axis of the disposable diaper can be adjusted by adjusting the degree of overlap of the pulling section in which the fastening means is attached to the ear part with the first oblique side edge section or the second oblique side edge section
  • a major part of the tensile force applied to the fastening means is applied to the first waist lapping section when the degree of overlap of the pulling section with the first oblique side edge section is greater than that with the second oblique side edge section, and to a portion of the end edge of the ear part on the side of the transverse center axis of the disposable diaper when degree of overlap of the pulling section with the first oblique side edge section is smaller than that with the second oblique side edge section
  • first oblique side edge section or the second oblique side edge section is defined in positional connection with the point where the line extending from the end of the elastic waist fastening means or the elastic leg fastening means so as to be tangent to the stress relaxing structure intersects the oblique side edge of the ear part, the application of the tensile force applied to the fastening means to the elastic waist fastening means and the elastic leg fastening means is ensured.
  • Fig. 1 is a development of a disposable diaper in accordance with the present invention
  • Fig. 2 is a fragmentary sectional view of a absorbent part of a disposable diaper in accordance with the present invention
  • Fig. 3 is a fragmentary sectional view of a ear part
  • Fig. 4 is a plan view of a stress relaxing structure in a first example included iri a disposable diaper in accordance with the present invention
  • Fig. 5 is a stress relaxing structure in a second example included in a disposable diaper in accordance with the present invention.
  • Fig. 6 is a stress relaxing structure in a third example included in a disposable diaper in accordance with the present invention.
  • Fig. 7 is a stress relaxing structure in a fourthexample included in a disposable diaper in accordance with the present invention.
  • Fig. 8 is a typical side view of assistance in explaining a stress relaxing structure forming device
  • Fig. 9 is a plan view of a forming plate of the stress relaxing structure forming device.
  • Fig. 10 is a fragmentary perspective view of a stress relaxing structure formed by the stress relaxing structure forming device of Fig. 8;
  • Fig. 11 is a fragmentary perspective view of a formed intermediate film shown in Fig. 10, in a half stretched state
  • Fig. 12 is a fragmentary perspective view of the formed intermediate film shown in Fig. 10 in a fully stretched state;
  • Fig. 13 is a fragmentary development of a disposable diaper in accordance with the present invention, for assistance in explaining the distribution of a tensile force applied to a fastener at a predetermined distribution ratio;
  • Fig. 14 is a fragmentary development of a disposable diaper in accordance with the present invention, for assistance in explaining the distribution of a major part and a minor part of a tensile force applied to a fastener to a waist lapping section and a leg lapping section, respectively, of the disposable diaper;
  • Fig . 15 is a fragmentary development of a disposable diaper in accordance with the present invention, for assistance in explaining the distribution of a minor part and a major part of a tensile force applied to a fastener to a waist lapping section and a leg lapping section, respectively, I I of the disposable diaper,
  • Fig 16 is a fragmentary development of assistance in explaining a first oblique side edge section a and a second oblique side edge section b,
  • Fig 17 is a fragmentary development of assistance in explaining the dependence of the distribution of a tensile force on the position of a fastener on an ear part
  • Fig 18 is a fragmentary development of assistance in explaining the distribution of a tensile force applied to a fastener
  • Fig 19 is a fragmentary development of assistance in explaining a method of determining a first oblique side edge section
  • Fig 20 is a fragmentary development of assistance in explaining another method of determining a first oblique side edge section
  • Fig 21 is a fragmentary development of assistance in explaining the positional relation of a first oblique side edge section a and a second oblique side edge section b with a stress relaxing structure formed in a disposable diaper in accordance with the present invention
  • Fig 22 is a fragmentary development of assistance in explaining the positional relation of a first oblique side edge section a and a second oblique side edge section b with a stress relaxing structure formed in a disposable diaper in accordance with the present invention
  • Fig 23 is a fragmentary development of assistance in explaining a first oblique side edge section a and a second oblique side edge section b of an oblique side edge of an ear part of a disposable diaper in accordance with the present invention and
  • Fig 24 is a fragmentary development of an ear part in another example Description of the Preferred Embodiments
  • a disposable diaper 1 in a first embodiment according to the present invention has a first waist lapping section 2a, a crotch lapping section 2b and a second waist lapping section 2c, and comprises an absorbent part formed substantially in a rectangular shape an hourglass shape, a T-shape, an asymmetric shape or such, side flaps 4 formed in the opposite side portions of the absorbent part 3, respectively, elastic members 5 longitudinally extended in the flaps 4 to provide the flaps 4 with elasticity, a pair of ear parts 6 projecting in opposite directions from the opposite side edges of the upper end portion of the first waist lapping section 2a of the absorbing part 3, respectively, and two fasteners 7 attached to the oblique side edges 6a of the ear parts 6, respectively
  • Each ear part 6 has a slightly oblique upper edge 6b declining at a predetermined angle to the upper edge 1a parallel to the transverse center axis of the disposable diaper 1 , an oblique side edge 6a extending obliquely downward from the outer end of the upper edge 6b, and an oblique lower edge 6c extending from the outer end of the oblique side edge 6a to the side edge of the absorbent part 3
  • the fastener 7 is attached to the ear part 6 so as to extend substantially perpendicularly to the oblique side edge 6a from the oblique side edge 6a
  • the inclination , i e the angle as measured in a counterclockwise direction, between the oblique side edge 6a and a vertical line passing the intersection point of the upper side edge 6b and the oblique side edge 6a and parallel to the longitudinal center axis L-L' of the disposable diaper 1 meets an inequality 0 ⁇ ⁇ 45
  • the absorbent part 3 is formed by sandwiching an absorbent core 9 between a liquid-permeable top sheet 8 and a liquid-impermeable back sheet 10
  • the top sheet 8 and the back sheet 10 have a length and a width greater than those of the absorbent core 9
  • At least portions of the top sheet 8 and the back sheet 10 corresponding to the crotch lapping section 2b and extending outward beyond each longitudinal side edge of the absorbent core 9 form a side flap 4, and elastic members 5 are extended longitudinally in the side flap 4 to provide the side flap with elasticity
  • the absorbent core 9 is unimtative to the skin and capable of absorbing and holding liquid excrements including urine Generally, the absorbent core 9 is formed of crushed wood pulp generally cold cotton pulp
  • the absorbent core 9 may be formed in any suitable shape and construction as occasion demands.
  • the total absorption of the absorbent core 9 must correspond to a design charge and a desired use
  • the size and the absorbing ability of the absorbent core 9 are
  • the back sheet 10 prevents wetting an article, such as a bed sheet or underwear, that comes into contact with the disposable diaper 1 with excrements absorbed and held by the absorbent core 9
  • the back sheet 10 is a film of a thermoplastic polymer, such as a polyethylene film, a polypropylene film or the like, or a film of a composite material, such as film- coated nonwoven fabric.
  • the back sheet 10 is an embossed thermoplastic film simulating fabric.
  • the top sheet 8 is is a porous foam sheet, a meshed foam sheet, a perforated plastic film or a woven or nonwoven fabric of a natural textile material, such as wood fibers or cotton fibers, a synthetic textile material, such as polyester fibers or polypropylene fibers, or a blended textile material, such as a blend of a natural textile material (or natural textile materials) and a synthetic textile material (or synthetic textile materials).
  • a natural textile material such as wood fibers or cotton fibers
  • a synthetic textile material such as polyester fibers or polypropylene fibers
  • a blended textile material such as a blend of a natural textile material (or natural textile materials) and a synthetic textile material (or synthetic textile materials).
  • the top sheet 8 is formed of a hydrophobic material to separate the liquid absorbed by the absorbent core 9 from the wearer's skin.
  • the ear parts 6 having a substantially trapezoidal shape are joined to the opposite side edges of the first waist lapping section 2a of the rectangular absorbent part 3, respectively, by a known method, such as heat-sealing or adhesive bonding.
  • the ear parts 6 may be formed integrally with the absorbent part 3 by projecting the respective upper side portions of the top sheet 8 and the back sheet 10 outward in lugs having the shape of the ear parts 6, and directly joining together the projecting lugs of the top sheet 8 and the back sheet 10.
  • the absorbent part 3 and the ear parts 6 may be formed in an integral structure by cutting a laminated sheet formed by sandwiching a sheet between the top sheet 8 and the back sheet 10 in desired dimensions
  • the ear parts 6 are formed by laminating a nonwoven fabric 11 of natural fibers, synthetic fibers or a blend of natural fibers and synthetic fibers, a thermoplastic film 13 of polyethylene or polypropylene, and a porous film 12 formed by a known process and sandwiched between the nonwoven fabric 11 and the thermoplastic film 13 by adhesive layers 14 and 15 as shown in Fig.
  • the nonwoven fabric 11 and the thermoplastic film 13 correspond to the extension of the top sheet 8 and the extension of the back sheet 10, respectively.
  • the porous film 12 sandwiched between the nonwoven fabric 11 and the thermoplastic film 13 provides the ear parts 6 with firmness, which facilitates handling the ear parts 6 when putting the disposable diaper 1 on the wearer.
  • the ear parts 6 have each a substantially trapezoidal stress relaxing structure 20 in their inner portions excluding the peripheral portions.
  • the stress relaxing structure 20 may be formed in a substantially trapezoidal shape having longitudinal gaps 20a as shown in Fig 4 or in a substantially trapezoidal shape having transverse gaps 20b as shown in Fig 5
  • the stress relaxing structure 20 may be formed in any suitable shape other than a trapezoidal shape, such as a triangular shape, a rectangular shape, a shape of a part of an ellipse or a shape of a part of a circle, provided that the stress relaxing structure 20 has a function to relax stress.
  • the stress relaxing structure 20 of the ear part 6 may be an aggregate of a plurality of longitudinal slits 21a formed in the laminated sheet forming the ear part 6 as shown in Fig 6
  • the stress relaxing structure 20 may be a single slit 21a provided that the single slit 21a is capable of intercepting the transmission of a tensile force applied to the ear part 6 to the absorbent part 3.
  • the ear part 6 may be formed in an elastic structure, and a strip of an unstretchable film or an unstretchable strand 30 may be attached to a peripheral portion of the elastic structure excluding an inner trapezoidal elastic portion corresponding to the stress relaxing structure 20 to use the inner trapezoidal elastic portion as the stress relaxing structure 20
  • a tensile stress induced in the stress relaxing structure 20 is smaller than that which is induced in the peripheral portion of the ear part 6 surrounding the stress relaxing structure 20.
  • Tensile stress is a resistive force developed by a material bearing a tensile load. Therefore, "a structure having a small tensile stress” is a structure yielding to and easily stretchable by a comparatively small tensile force.
  • Stress relaxing structure include a vacancy formed in the ear part 6 and virtually serving as a stress relaxing structure 20.
  • the stress relaxing structure 20 is formed by the following method. As shown in Fig. 8, a sheet 21 to form the ear part 6 is compressed between a plate 22 provided with a plurality of ridges 22a in an area of the inner surface thereof corresponding to the stress relaxing structure 20, and a plate 23 provided with a plurality of ridges 23a in an area of the inner surface thereof corresponding to the stress relaxing structure 20 As shown in Fig 9, narrow grooves 25a are formed across the plurality of ridges 23a of the plate 23 The plurality of ridges 22a of the plate 22 are continuous and not interrupted As shown in Fig 10, the stress relaxing structure 20 formed by thus compressing the sheet 21 between the plates 22 and 23 has a plurality of undeformed sections 25, a plurality of permanently deformed sections 26, and transitional sections 27 between the undeformed sections 25 and the permanently deformed sections 26 Ridges 28 are formed in the permanently deformed sections 26 The undeformed sections 25 are defined by the narrow grooves 25a of the plate 23 and the corresponding portions of the ridges 22a of the plate
  • the undeformed sections 25 are plastically stretched to some extent as shown in Fig 11 and, as the undeformed sections 25 are further stretched, the ridges 28 of the permanently deformed sections 26 are flattened as shown in Fig 12 and the ear part 6 cannot be stretched any further
  • the sheet 21 having such characteristics is a laminated sheet
  • at least one of the component layer of the sheet 21 is formed of a stretchable film, such as a polyolefin film, a low-density linear polyethylene film, a low-density polyethylene film a high-density polyethylene film or a polypropylene film
  • the stress relaxing structure 20 that can be stretched by a small tensile force is thus formed in the sheet 21 forming the ear part 6 Since the periphery of the sheet 21 surrounding the stress relaxing structure 20 is unprocessed, the periphery of the sheet 21 does not yield to tension when the sheet 21 is tensioned or the periphery is harder to stretch than the stress relaxing structure 20 When tensioned, the stress relaxing structure 20 yields to the tensile force to absorb the tensile force and does not cause the peripheral portion of the ear part 6 to shrink
  • the sheet 21 forming the ear part 6 may be formed of a somewhat stretchable material
  • the stress relaxing structure 20 can be formed in the sheet 21 by the aforesaid process In either case, the stress relaxing structure 20 can be stretched by a tensile force smaller than that necessary for stretching the peripheral portion of the ear part 6
  • the stress relaxing structure 20 of the ear part 6 serves to divide the tensile force D into a component tensile force D1 acting on the waist lapping portion and a component tensile force D2 acting on the leg lapping portion That is, since a tensile force greater than that necessary for stretching the stress relaxing structure 20 must be applied to the peripheral portions of the ear part 6 to stretch the peripheral portion, most part of the tensile force applied to the fastener 7 is divided into the component tensile forces D1 and D2, and the component tensile forces D1 and D2 act directly on regions X and Z of the absorbent part 3, respectively Even if part of the tensile force D acts on the stress relaxing structure 20, the stress relaxing structure 20 is not stretched in a extreme state as shown in Fig 12 because the stress relaxing structure 20 can be stretched by a
  • the fastener 7 is attached to the oblique side edge 6a of the ear part 6 so as to extend perpendicularly to the oblique side edge 6a and the fastener 7 is pulled in a direction perpendicular to the oblique side edge 6a Since the fastener 7 is pulled necessarily in a direction perpendicular to the oblique side edge 6a of the ear part 6, the direction in which the fastener 7 is pulled with respect to the absorbent part 3 is dependent on the inclination of the oblique side edge 6a, which may be varied in the range of 0 ⁇ ⁇ 45 That is, since the fastener 7 is pulled in a fixed direction with respect to the oblique side edge 6a, the difference between the component tensile forces D1 and D2 is not very large when the inclination of the oblique side edge 6a is small, and the ratio of the component tensile force D2 to the component tensile force D1 increases with the increase of the inclination of the
  • the pulling section R corresponds substantially to the middle of the side edge of the stress relaxing structure 20 as shown in Fig. 13, the tensile force D applied to the fastener 7 in the direction of the arrow is divided into the component tensile forces D1 and D2, and the component tensile force D2 that acts around the leg is greater than the component tensile force D1 that acts around the waist by a predetermined value.
  • the pulling section R is at a position shown in Fig. 14 below the position of the pulling section R shown in Fig.
  • the tensile force D applied to the fastener 7 in the direction of the arrow is divided into the component tensile forcesDI and D2, the component tensile force D1 that acts around the waist is comparatively large and the component tensile force D2 that acts around the leg is comparatively small.
  • the position of the pulling section R and the positional relation between the same and other parts to distribute the tensile force applied to the fastener 7 surely to desired portions of the absorbent part 3 will be described below.
  • the position of the pulling section R for the fastener 7 on the oblique side edge 6a is determined by construction shown in Fig 16
  • the position of the pulling section R is important for effectively and directly distributing a tensile force applied to the fastener 7 to a desired waist lapping portion and a desired leg lapping portion of the disposable diaper 1 Referring to Fig.
  • a line L-L" indicates the longitudinal center axis of the disposable diaper 1 and a line H-H' indicates the transverse center axis of the disposable diaper 1 perpendicular to the longitudinal center axis L-L'
  • P is the intersection point of the longitudinal center axis L-L ' and the upper edge 1a of the first waist lapping section 2a
  • Q is the intersection point of the lower side edge 6c of the ear part 6 on the side of the transverse center line H-H' and the side flap 4
  • at L1 is a line extending from the intersection point P so as to be tangent to a point on the stress relaxing structure 20 on the side of the upper edge 1a
  • at L2 is a line extending from the intersection point Q so as to be tangent to a point on the • stress relaxing structure 20 on the side of the transverse center axis H-H'
  • A is the intersection point of the line L1 and the oblique side edge 6a
  • at B is the intersection point of the line L2 and
  • a tensile force D applied to the oblique side edge 6a by the fastener 7 is distributed in the ear part 6 as shown in Fig 17
  • a point M of action of the tensile force applied to the fastener 7 is in the pulling section R in which the fastener 7 is attached to the oblique side edge 6a and coincides with the intersection point A in this example
  • the part of the tensile force is decomposed into representative component forces F1 , F2, F3 and F4 as shown in Fig 18
  • the component force F1 is directed toward the upper edge 1a and not directly toward the intersection point P Therefore, the component force F1 does not act directly on the intersection point P
  • the direction of the component force F2 is aligned with the line L1 and hence the component force F2 acts directly on the intersection point P
  • the component force F3 is directed toward the stress relaxing structure 20 and tends to stretch the stress
  • the line L1 is a boundary line between positions for the point M of action that enables the direct action of a component force of the tensile force applied to the fastener 7 on the intersection point P and those for the point M of action that disables the direct action of the component force on the intersection point P.
  • the line L2 drawn in connection with the intersection point Q is a boundary line between positions for the point M of action that enables the direct action of a component force of the tensile force applied to the fastener 7 on the intersection point Q.
  • the waist lapping portion of the disposable diaper 1 can be firmly fastened around the waist by applying tensile forces to the two ear parts 6, when part of each of the tensile forces can be applied directly to the intersection point P
  • part of the tensile force applied to the fastener 7 can be applied directly on the desired points P and Q on the absorbent part 3 when the pulling section R in which the fastener 7 is attached to the oblique side edge 6a of the ear part 6 overlaps part of the first oblique side edge section a defined by the line L1 and part of the second oblique side edge section b defined by the line L2
  • the intersection point P is on the longitudinal center line L-L' of the disposable diaper 1 , the waist lapping portion of the disposable diaper 1 can be firmly fastened around the waist by applying tensile forces to the two ear parts 6, when part of each of the tensile forces can be applied directly to the intersection point P
  • part of the intersection point P is on the longitudinal center line L-L' of the
  • a line L1 is extended from the intersection point P', which corresponds to the intersection point P in the first embodiment, of the upper edge 1a of an absorbent part 3 and the side edge 31 of the absorbent part 3 parallel to the longitudinal center axis L-L' of the disposable diaper 1 so as to be tangent to a stress relaxing structure 20
  • a line L2 is extended from the intersection point Q of the lower end of an ear part 6 and a flap 4 extended along the side edge 31 of the absorbent part 3
  • the line L1 intersects the oblique side edge 6a of the ear part 6 at an intersection point A, which corresponds to the intersection point A in the first embodiment
  • the line L2 intersects the oblique side edge 6a at an intersection point B, which corresponds to the intersection point B in the first embodiment
  • the respective magnitudes of a component tensile force D1 for fastening the waist lapping portion of the absorbent part 3 around the waist and a component tensile force D2 for fastening the leg lapping portion of the absorbent part 3 around the leg are determined by adjusting the ratio of the size of a portion of the pulling section R, in which a fastener 7 is attached to the oblique side edge 6a, overlapping the first oblique side edge section a to the size of the pulling section R, and the ratio of the size of a portion of the pulling section R overlapping the second oblique side edge section b to the size of the pulling section R.
  • An area defined by the line L2 the lower side edge 6c of the ear part 6 and the oblique side edge 6a of the ear part 6 is a leg lapping portion fastening component force distributing area 41
  • a portion of the oblique side edge 6a associated with the leg lapping portion fastening component force distributing area 41 is a second oblique side edge section b.
  • a component tensile force of the tensile force applied to the fastener 7 acts directly on the intersection point Q.
  • the ratio between the component tensile force D1 distributed to the waist lapping portion fastening component force distributing area 40 and the component tensile force D2 distributed to the leg lapping portion fastening component force distributing area 41 can be adjusted by adjusting the the ratio of the size of a portion of the pulling section R, in which a fastener 7 is attached to the oblique side edge 6a, overlapping the first oblique side edge section a to the size of the pulling section R, and the ratio of the size of a portion of the pulling section R overlapping the second oblique side edge section b to the size of the pulling section R
  • the pulling section R in which the fastener 7 is attached to the oblique side edge 6a, overlaps the first oblique side edge section a entirely and overlaps the second oblique side edge section b partly, a major part of the tensile force applied to the fastener 7 is distributed to the waist lapping portion fastening component force distributing area 40
  • the pulling section R overlaps
  • the fastener 7 is attached to the oblique side edge 6a in the pulling section R so as to extend perpendicularly to the oblique side edge 6a, so that the tensile force applied to the fastener 7 acts in a direction oblique to the longitudinal center axis L-L' of the disposable diaper 1 , and the tensile forces applied to the two fasteners 7 attached to the ear parts 6 can be -/">
  • Figs 21 and 22 show the dependence of the relation between the first oblique side edge section a and the second oblique side edge section b on the position of a stress relaxing structure 20 in an ear part 6 in a disposable diaper 1 in a third embodiment according to the present invention
  • the stress relaxing structure 20 has a shape resembling a rectangle, which is different from the shape of the stress relaxing structure 20 shown in Fig 16
  • the line L1 extending from the intersection point P so as to be tangent to the stress relaxing structure 20 and the line L2 extending from the intersection point Q so as to be tangent to the stress relaxing structure 20 do not intersect each other within the ear part 6
  • the lines L1 and L2 intersect the oblique side edge 6a at intersection points A and B, respectively
  • a first oblique side edge section a extends on the side of the upper edge 1a of an absorbent part 3 from the intersection point A
  • a second oblique side edge section b extends on the side of the transverse
  • a line L1 is extended from the intersection point P so as to be tangent to a stress relaxing structure 20 and intersects the oblique side edge 6a of an ear part 6 at an intersection point A
  • a line L2 is extended from the intersection point Q so as to be tangent to the stress relaxing structure 20 and intersects an extension of the oblique side edge 6a at an intersection point B
  • the intersection point B is a virtual point apart from the ear part 6
  • an actual second oblique side edge section b' is a portion of a second oblique side edge section b, on the oblique side edge 6a
  • a fastener 7 is attached to the oblique side edge 6a in a pulling section R partially overlapping the first oblique side edge section a and the actual second oblique side edge section b'
  • the oblique side edge sections a and b can be defined even if the lines L1 and L2 do not
  • a disposable diaper 1 in a fifth embodiment according to the present invention is provided with ear parts 6 each having a lower side edge 6c having a lower curved portion S curved in the shape of a circular arc as shown in Fig 23
  • a line L2 is tangent to the lower curved portion S of the lower side edge 6c and a stress relaxing structure 20 and intersects the oblique side edge 6a of the ear part 6 at an intersection point B Therefore, a component tensile force of a tensile force applied to the ear part 6 at the intersection point B can be transmitted, acting along the line L2 can be transmitted to an absorbent part 3
  • the line L2 may be extended from the upper end of one of elastic members 5, i e , the outermost, the middle or the innermost elastic member 5, instead of from a point on the lower portion of the lower side edge 6c, so as to be tangent to the stress relaxing structure 20 In this case, a component tensile force of a tensile force applied to the ear part 6 at the intersection point B acts directly on the elastic members 5
  • the line L2 defines a second oblique side edge section b for directly applying a tensile force to the elastic members 5
  • the line L1 for determining the first oblique side edge section a is extended from the intersection point P of the longitudinal center axis L-L' of the absorbent part 3 and the upper edge 1a of the absorbent part 3 in this embodiment, the line L1 may be extended from the right end, as viewed in Fig 23, of one of elastic members not shown, i e , the outermost, the middle or the innermost elastic member attached to the upper waist lapping portion of
  • the oblique side edge 6a' of an ear part 6 extends obliquely downward and toward the longitudinal center axis L-L' of an absorbent part 3 from the outer extremity of the upper side edge 6b of the ear part 6
  • the inclination , i e the angle between the oblique side edge 6a' and a line passing the outer extremity of the upper side edge 6b and parallel to the longitudinal center axis L-L' of the absorbent part 3 meets an inequality 0 ⁇ ⁇ 45
  • a fastener 7 is attached to the oblique side edge 6a' of the ear part 6 so as to extend perpendicularly to the oblique
  • a line L1 extends from the intersection point P in tangent to an upper point of a stress relaxing structure 20 on the side of the upper edge 1a and intersects the oblique side edge 6a' at an intersection point A
  • a line L2 extends from the intersection point Q in tangent to a lower point of the stress relaxing structure 20 on the side of the transverse center axis H-H' of the absorbent part 3 and intersects the oblique side edge 6a' at an intersection point B
  • a first oblique side edge section a extends obliquely upward from the intersection point A
  • a second oblique side edge section b extends obliquely downward from the intersection point B.
  • a fastener 7 is attached to the oblique side edge 1 a' of the ear part 6 so as to extend perpendicularly to the oblique side edge 6a'. Since the fastener 7 is pulled in a direction perpendicular to the oblique side edge 6a' of the ear part 6, the direction with respect to the longitudinal center axis L- L' of the absorbent part 3 in which the fastener 7 is pulled is dependent on the inclination of the oblique side edge 6a' meeting an inequality: 0 ⁇ ⁇ 45 .
  • the fastener 7 is pulled perpendicularly to the oblique side edge 6a' regardless of the inclination of the oblique side edge 6a' of the ear part 6
  • the direction with respect to the longitudinal center line L-L' in which the fastener 7 is pulled is dependent on the inclination of the oblique side edge 6a'
  • the difference between a component tensile force D1 of a tensile force applied to the fastener 7, distributed to a waist lapping portion, and a component tensile force D2 of the same, distributed to a leg lapping portion is small when the inclination of the oblique side edge 6a' is comparatively small
  • the component tensile force D1 is greater than the component tensile force D2 when the inclination of the oblique side edge 6a' is comparatively large.
  • the fastener 7 is attached to the oblique side edge 6a' of the ear part 6 in a pulling section R.
  • the ratio between the component tensile forces D1 and D2 is dependent on the position of the pulling section R on the oblique side edge 6a'.
  • the fastener 7 of the disposable diaper 1 as packaged is folded back at its middle, and projects from the ear part 6 when the disposable diaper 1 is unfolded for use.
  • the fastener 7 may be formed in the shape of a fork. When thus folded back at the middle, no portion of the fastener 7 projects outward from the ear part 6.
  • the fastener 7 is formed in the shape of a fork, the tensile force applied to the fastener 7 can be further surely distributed to the waist lapping portion and the leg lapping portion.
  • the stress relaxing structure 20 is elastic, the stress relaxing structure 20 conforms easily to the shape of the hipbone and the like, which improves the wearing comfort of the wearer.

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)
  • Absorbent Articles And Supports Therefor (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Abstract

L'invention concerne une couche jetable (1) à matériau absorbant (3), dotée d'une paire de rabats (6) qui s'étendent à l'opposé de chacune des deux bordures latérales d'une extrémité longitudinale dudit matériau absorbant (3); en outre, un système d'attache (7) est fixé sur les bordures latérales obliques des rabats (6). L'inclinaison desdites bordures latérales fait qu'elles s'étendent selon un angle prédéterminé par rapport à l'axe central longitudinal du matériau absorbant (3); le système d'attache (7) est fixé sur les bordures latérales obliques, chacune de ces bordures ayant une première et une deuxième section; dans une partie autre que la partie périphérique, chacun des deux rabats (6) est doté d'une structure à relaxation de traction où est induite une contrainte de traction inférieure à la contrainte induite dans la partie périphérique des rabats (6); enfin, chaque système d'attache est fixé sur son rabat (6) dans une zone de la bordure latérale oblique prévue pour l'étirement afin de répartir les forces de traction.
PCT/US1996/002922 1995-03-22 1996-03-04 Couche jetable WO1996029038A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CA002213802A CA2213802C (fr) 1995-03-22 1996-03-04 Couche jetable
EP96910363A EP0814740A4 (fr) 1995-03-22 1996-03-04 Couche jetable
MX9707210A MX9707210A (es) 1995-03-22 1996-03-04 Pañal desechable.
AU53576/96A AU5357696A (en) 1995-03-22 1996-03-04 Disposable diaper
US08/913,486 US5906008A (en) 1995-03-22 1996-04-03 Disposable diaper

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP7/62795 1995-03-22
JP7062795A JP2868706B2 (ja) 1995-03-22 1995-03-22 使い捨ておむつ

Publications (1)

Publication Number Publication Date
WO1996029038A1 true WO1996029038A1 (fr) 1996-09-26

Family

ID=13210650

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/002922 WO1996029038A1 (fr) 1995-03-22 1996-03-04 Couche jetable

Country Status (7)

Country Link
EP (1) EP0814740A4 (fr)
JP (1) JP2868706B2 (fr)
KR (1) KR100235695B1 (fr)
AU (1) AU5357696A (fr)
CA (1) CA2213802C (fr)
MX (1) MX9707210A (fr)
WO (1) WO1996029038A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998014156A1 (fr) * 1996-10-03 1998-04-09 The Procter & Gamble Company Article absorbant jetable muni de panneaux lateraux extensibles
US6004306A (en) * 1993-11-19 1999-12-21 The Procter & Gamble Company Absorbent article with multi-directional extensible side panels
WO2000037005A2 (fr) * 1998-12-18 2000-06-29 Kimberly-Clark Worldwide, Inc. Culotte reglable et repositionnable
US7217260B2 (en) 2001-01-31 2007-05-15 The Procter & Gamble Co. Absorbent article with tension-dividing side panels
EP1902697A1 (fr) * 2006-09-22 2008-03-26 Tyco Healthcare Retail Services AG Article absorbant et ses pattes refermables
EP1962755A1 (fr) * 2005-12-21 2008-09-03 Sca hygiene products ab Panneau lateral pour un objet absorbant tel qu'une couche, une protection pour incontinence ou analogue
EP2813197A4 (fr) * 2012-02-07 2015-10-07 Unicharm Corp Couche jetable
EP2538904B1 (fr) 2010-02-25 2018-01-24 The Procter and Gamble Company Article absorbant ayant un caractère de type vêtement amélioré

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010515519A (ja) * 2007-01-10 2010-05-13 ザ プロクター アンド ギャンブル カンパニー 伸張可能な側部を備える使い捨て着用可能吸収性物品
JP5237062B2 (ja) * 2008-11-28 2013-07-17 花王株式会社 使い捨ておむつ
JP5638314B2 (ja) * 2010-08-24 2014-12-10 株式会社リブドゥコーポレーション 吸収性物品
JP2012183094A (ja) * 2011-03-03 2012-09-27 Zuiko Corp 使い捨て着用物品およびその製造方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5242436A (en) * 1991-06-13 1993-09-07 The Procter & Gamble Company Absorbent article with fastening system providing dynamic elasticized waistband fit
US5383871A (en) * 1993-06-03 1995-01-24 The Procter & Gamble Company Absorbent articles having a closure system providing sustained dynamic fit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5242436A (en) * 1991-06-13 1993-09-07 The Procter & Gamble Company Absorbent article with fastening system providing dynamic elasticized waistband fit
US5383871A (en) * 1993-06-03 1995-01-24 The Procter & Gamble Company Absorbent articles having a closure system providing sustained dynamic fit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0814740A4 *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5997521A (en) * 1993-11-19 1999-12-07 The Procter & Gamble Company Disposable absorbent article with extensible side panels
US6004306A (en) * 1993-11-19 1999-12-21 The Procter & Gamble Company Absorbent article with multi-directional extensible side panels
WO1998014156A1 (fr) * 1996-10-03 1998-04-09 The Procter & Gamble Company Article absorbant jetable muni de panneaux lateraux extensibles
WO2000037005A2 (fr) * 1998-12-18 2000-06-29 Kimberly-Clark Worldwide, Inc. Culotte reglable et repositionnable
WO2000037005A3 (fr) * 1998-12-18 2000-08-03 Kimberly Clark Co Culotte reglable et repositionnable
US7807861B2 (en) 2001-01-31 2010-10-05 The Procter & Gamble Company Absorbent article with tension-dividing side panels
US7217260B2 (en) 2001-01-31 2007-05-15 The Procter & Gamble Co. Absorbent article with tension-dividing side panels
EP1962755A4 (fr) * 2005-12-21 2011-05-04 Sca Hygiene Prod Ab Panneau lateral pour un objet absorbant tel qu'une couche, une protection pour incontinence ou analogue
EP1962755A1 (fr) * 2005-12-21 2008-09-03 Sca hygiene products ab Panneau lateral pour un objet absorbant tel qu'une couche, une protection pour incontinence ou analogue
US8216204B2 (en) 2005-12-21 2012-07-10 Sca Hygiene Products Ab Side panel for an absorbent article, such as a diaper, an incontinence guard or similar item
EP1902697A1 (fr) * 2006-09-22 2008-03-26 Tyco Healthcare Retail Services AG Article absorbant et ses pattes refermables
EP2538904B1 (fr) 2010-02-25 2018-01-24 The Procter and Gamble Company Article absorbant ayant un caractère de type vêtement amélioré
EP2813197A4 (fr) * 2012-02-07 2015-10-07 Unicharm Corp Couche jetable
US9517167B2 (en) 2012-02-07 2016-12-13 Unicharm Corporation Disposable diaper with cushioning unit adjacent a leg stretch unit in the longitudinal direction

Also Published As

Publication number Publication date
EP0814740A4 (fr) 2000-03-29
JP2868706B2 (ja) 1999-03-10
JPH08266572A (ja) 1996-10-15
CA2213802A1 (fr) 1996-09-26
MX9707210A (es) 1997-11-29
EP0814740A1 (fr) 1998-01-07
KR100235695B1 (ko) 1999-12-15
CA2213802C (fr) 2001-07-10
AU5357696A (en) 1996-10-08
KR19980703129A (ko) 1998-10-15

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