WO1999065436A1 - Procede pour attacher des rabats barrieres a une feuille externe pour articles absorbants - Google Patents

Procede pour attacher des rabats barrieres a une feuille externe pour articles absorbants Download PDF

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Publication number
WO1999065436A1
WO1999065436A1 PCT/SE1999/001092 SE9901092W WO9965436A1 WO 1999065436 A1 WO1999065436 A1 WO 1999065436A1 SE 9901092 W SE9901092 W SE 9901092W WO 9965436 A1 WO9965436 A1 WO 9965436A1
Authority
WO
WIPO (PCT)
Prior art keywords
band
sheet
anvil
fastening
plates
Prior art date
Application number
PCT/SE1999/001092
Other languages
English (en)
Inventor
Anders Gustafsson
Original Assignee
Sca Hygiene Products Ab
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 Sca Hygiene Products Ab filed Critical Sca Hygiene Products Ab
Publication of WO1999065436A1 publication Critical patent/WO1999065436A1/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
    • A61F13/494—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means
    • A61F13/49473—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means the edge leakage prevention means having a continuous closed form, e.g. circle, ellipse, rectangle
    • 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
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15585—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers
    • A61F13/15593—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers having elastic ribbons fixed thereto; Devices for applying the ribbons
    • A61F13/15609—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers having elastic ribbons fixed thereto; Devices for applying the ribbons the ribbons being applied in an irregular path

Definitions

  • the present invention relates to a method and to an arrangement for fastening an endless, elastic elongated band to a sheet of material such that the plane of the band will be inclined relative to the plane of said sheet and such that the band will peripherally have solely straight or outwardly curving parts.
  • the invention also relates to, an outer sheet provided with one such band.
  • the barrier flaps are normally fastened to the outer sheet of the diaper while lying in the same plane as the outer sheet and will not take a raised position in relation to the outer sheet under the influence of elastic forces until the diaper is curved longitudinally as it is put onto the wearer.
  • This method of providing raised barrier flaps is very effective in the case of longitudinal flaps, since the diaper shall have a relatively large longitudinal curvature when worn, so as to conform to the contours of the wearer's body.
  • this barrier flap fastening method is not as effective in respect of transversely extending barrier flaps, since transverse curvature of the diaper is relatively slight in the front and rear diaper parts, where transverse barriers are desirable.
  • the object of the present invention is to satisfy this requirement and to provide a one-piece barrier flap which extends both longitudinally and transversely on a sheet of material.
  • a method of fastening an endless, elastic elongated band to a sheet of material such that the plane of the band will be inclined relative to the plane of said sheet and such that the band periphery will have solely straight or outwardly curving parts said method being characterised by threading the endless band in a stretched state on an anvil or counterpressure means that has a free end and a periphery that has the desired form of straight and/or outwardly curved parts, such that a part of the band will project out beyond the free end of the anvil, wherewith the outwardly projecting part of the band contracts so that this part of the band will be folded in around its perimeter against the end surface of said anvil, and thereafter pressing the band part that has been folded in against the end surface of the anvil against said sheet of material and fastening said part thereto.
  • This procedure enables a barrier flap which in a raised state forms a closed loop on a part of a sheet of material to be obtained in a particularly simple manner.
  • the method is also suitable for fastening barrier flaps to a moving web of material and can therefore be readily integrated in an absorbent article production line without having a disturbing effect on the manufacturing process.
  • the part of the band that has been folded in on the anvil is fastened to said sheet of material by heat welding or ultrasonic welding, or may be glued to said sheet.
  • the invention also relates to arrangement for fastening an endless, elastic elongated band to a sheet of material such that the plane of the band will be inclined relative to the plane of the sheet and such that the band perimeter will have solely straight or outwardly curved parts.
  • the arrangement is characterised by an anvil or counterpressure means that has a free end and a peripheral surface that includes the desired configuration of straight and/or outwardly curved parts; means for threading the band in a stretched state onto the free end of the anvil so that a part of the band will project outwardly beyond said free end, wherewith the outwardly projecting part of the band contracts so as to fold this part of the band around its periphery against the end surface of the anvil; means for pressing a sheet of material against that part of the band that has been folded inwardly on the end surface of the anvil; and means for fastening to said sheet that part of the band that has been pressed thereagainst.
  • That part of the band which pressed against said sheet is fastened thereto with the aid of heat welding or ultrasonic welding means, although it may alternatively be glued thereto.
  • the devices for threading, or passing, the band over the anvil comprise two flat collector plates which have a width corresponding to the greatest width of the anvil and which, when the planar sides of the plates face towards each other, are spaced apart at a distance which is greater than the length of said anvil.
  • the arrangement also includes means for advancing two elongated, stretched elastic webs of material in mutually superimposed and mutually spaced relationship; means for joining the webs together along transverse join lines; means for inserting the collector plates in between the two webs of material and between two transverse join lines with the plates disposed in a first position in which their planar sides lie in mutually the same plane; means for cutting the webs on both sides of the transverse join lines between which the plates are disposed in their first position; means for turning the plates between said first position to a second position in which their planar sides face towards each other, and vice versa; and means for moving the collector plates and the elastic band supported thereon across the anvil.
  • the invention also relates to a diaper outer sheet, an incontinence protector or a sanitary napkin which is characterised in that it includes an endless elastic band having two opposing edges and fastened to the outer sheet at one edge part and extending around a part of said outer sheet with a peripheral configuration that includes solely straight and/or outwardly curving parts.
  • the elastic band is comprised of an endless strip of flexible material that includes a pre-stretched elastic element along each of said mutually opposing edges.
  • Fig. 1 illustrates two elastic bands included in an arrangement for fastening a barrier flap to a sheet of material in accordance with one preferred embodiment of the invention
  • Fig. 2 is a highly schematic view from above of a first part of an arrangement according to a preferred embodiment of the invention
  • Fig. 3 illustrates from above collector plates included in the arrangement shown in Figure 2;
  • Fig. 4 illustrates a second part of the arrangement that coacts with the first part shown in Figure 2;
  • Fig. 5 is a cross-sectional view taken on the line V-N in Figure 4;
  • Fig. 6 is a cross-sectional view taken on the line NI-NI in Figure 4.
  • Fig. 7 is a view similar to the view of Figure 3 and illustrates a second embodiment of collector plates.
  • Figs- 8-10 illustrates from above diapers that include different barrier flaps.
  • Figure 1 shows two flexible bands 1 and 2, e.g. bands of plastic film. Stretched elastic threads 3, 3' are fastened to respective opposing edges of respective bands.
  • FIG 2 is a schematic illustration of part of an arrangement for providing an outer sheet with barrier flaps.
  • the bands 1 and 2 run through the Figure 1 arrangement in the arrowed direction.
  • the bands 1, 2 are advanced whilst being spaced slightly apart, as shown in Figure 1.
  • the bands first pass a joining device 4, e.g. an ultrasonic welding device, in which the bands 1, 2 are mutually joined by means of separate pairs of transverse welds 5.
  • Rectangular collector plates 6, 7 are then inserted between the bands 1, 2 and between two mutually sequential pairs of transverse welds 5. After being inserted between the bands, the collector plates 6, 7 are moved in the same direction and at the same speed as the bands.
  • the arrangement includes several pairs of collector pairs 6, 7, of which two pairs are shown in Figure 2.
  • the bands 1, 2 are cut transversely between the two weld seams 5 in each pair of welds immediately after the upstream collector plate 6, as seen in the feed direction, has passed a cutting tool 8 of some suitable kind, e.g. a punch.
  • a cutting tool 8 of some suitable kind, e.g. a punch.
  • the two collector plats 6, 7 are turned through 90° from the insertion position, in which their broad sides lay in the same plane, so as to cause said broad sides to face towards each other.
  • the sides of the endless band consisting of portions of the bands 1, 2 are thereby distanced from one another, as will be evident from Figure 3 which shows from above the right-hand pair of collector plates 6, 7 in Figure 2.
  • This rotation of the collector plates is achieved by connecting the plates to suitable turning devices, such as the output shafts of stepping motors, for instance.
  • FIG 4 is a schematic illustration of a second part of the arrangement.
  • a row of mutually separated pairs of collector plates 6, 7 carrying endless bands 1, 2 are advanced in the upper part of the second part of the arrangement shown in the Figure, in the arrowed direction.
  • the rows of collector plate pairs 6, 7 pass a rotating anvil roll 9 that has six anvils 10 projecting out from its periphery. These anvils penetrate sequentially in between the sides of the endless belts 1, 2 carried by the collector plate pairs 6, 7.
  • the anvils 10 are designed so as not to reach the upper edge of the band 1, 2 carried by the collector plate 6, 7, but so that the band will project out beyond the end surface of the anvil 10 upon completion of the band transfer. This allows the elastic thread 3 provided along the free band edge to contract from its stretched state. This contraction is made possible, by folding the free edge-part of the band 1, 2 in over the upper side of the anvil 10, as will best be seen from Figure 5. In order to ensure that the elastic thread 3 is unable to draw band material from the side surfaces of the anvil to its end surface, the tensioning force in the threads 3' will be equal to or greater than the tensioning force in the threads 3.
  • the threads 3 will conveniently have relatively low tension, so that said thread will be able to contract as the free edge-part of the band 1, 2 is folded-in, principally in a relaxed state. This will prevent the thread from loading the sheet of material to any appreciable extent subsequent to fastening the band to said sheet. It is also possible to "kill" the elasticity of the thread when heat welding or ultrasonic welding the inwardly folded edge part of the band. It is, of course, also possible to give the threads 3 a relatively high tension, so that its residual tension will load the sheet of material subsequent to fastening the band thereto and therewith pucker sheet and cause an underlying absorbent body to curve.
  • the anvils 10 are intended to coact with an ultrasonic horn 11 included in an ultrasonic welding unit not shown.
  • a web of material 12 is advanced between said horn 11 and the anvil roll 9 in the arrowed direction.
  • the ultrasonic welding unit is activated and the inwardly folded edge of the elastic band carried by the anvil is welded firmly to said sheet of material. Because the direction in which said sheet is advanced differs from the direction in which the anvil moves, the anvil will then be drawn out of the band fastened to said sheet.
  • the threads 3' will contract and therewith cause the sides of the band to slope towards each other and define an acute angle with the plane of said sheet, as will best be seen from Figure 6. This procedure results in a sheet of material that includes barrier flaps.
  • the barrier-flap carrying sheet 12 is then passed to a production line for the manufacture of absorbent articles, such as diapers, incontinence protectors or sanitary napkins.
  • aforedescribed barrier flap fastening method enables the barrier flaps to be fastened to a moving web of material, the method can be readily incorporated in such a production line without interfering with remaining parts of the manufacturing process.
  • the geometry of the barrier flaps produced by the described method is determined entirely by the geometry of the anvil. Any geometric configuration that includes solely straight and/or outwardly curved parts can be achieved, for instance rectangular shapes, square shapes, hexagonal shapes, circular shapes, oval shapes, etc. The method is thus extremely flexible and the described arrangement can be readily modified to shift between different shapes of the barrier flaps produced. All that is required is to change the anvil roll.
  • Figure 7 is a view similar to that of Figure 3 and illustrates collector plates 6', T which differ from the earlier described plates 6, 7 by virtue of having curved planar surfaces. Such a design can be desirable in some instances in order to adapt the geometric figure formed by the band carried by the plates to the shape of the anvil.
  • FIGs 8-10 are respective views from above of a diaper provided with different barrier flaps.
  • the diaper is typically comprised of an absorbent body 13 enclosed between a liquid-impermeable outer sheet and a liquid-permeable outer sheet 14.
  • Barrier flaps 15, 16 and 17 have been fastened to the outer sheet 14 of the illustrated diapers by means of the aforedescribed method.
  • the geometric figure formed by the barrier flaps 15 in the Figure 8 illustration consist of two longitudinal straight parts which are interconnected by two transverse, outwardly curved parts.
  • the barrier flaps 16 in the Figure 9 illustration have an oval configuration, while the diaper shown in Figure 10 has two circular barrier flaps 17.
  • the elastic bands may also be constructed in a manner different to that shown, for instance may be made totally of elastic material.
  • the join lines may be achieved by heat welding or by gluing as an alternative to ultrasonic welding. The invention is therefore only restricted by the contents of the following Claims.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Manufacturing & Machinery (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Abstract

L'invention concerne un procédé pour fixer une bande élastique allongée sans fin (1, 2) à une feuille de matériau (12) de manière à ce que le plan de cette bande soit incliné par rapport au plan de la feuille et que le périmètre de la bande comprenne uniquement des parties droites ou recourbées vers l'extérieur. Le procédé est caractérisé en ce que: on enveloppe avec la bande sans fin (1, 2) à l'état étiré une butée (10) possédant une extrémité libre et dont la surface périphérique correspond à la configuration désirée des parties droites et/ou recourbées vers l'extérieur, de manière à ce qu'une partie de la bande fasse saillie en dehors de l'extrémité libre de la butée, sous l'effet de quoi la partie de la bande tournée vers l'extérieur se contracte et par conséquent replie la bande vers l'intérieur autour de son périmètre contre la surface terminale de la butée; la partie de la bande pliée vers l'intérieur est pressée contre la feuille (12) puis fixée à celle-ci. L'invention se rapporte également à un dispositif pour mettre en oeuvre ce procédé et à une feuille externe produite par ce procédé.
PCT/SE1999/001092 1998-06-17 1999-06-17 Procede pour attacher des rabats barrieres a une feuille externe pour articles absorbants WO1999065436A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9802166-0 1998-06-17
SE9802166A SE511017C2 (sv) 1998-06-17 1998-06-17 Förfarande och anordning för att fästa barriärflikar till ett ytskikt för absorberande artikel samt ytskikt med barriärflikar för absorberande artikel

Publications (1)

Publication Number Publication Date
WO1999065436A1 true WO1999065436A1 (fr) 1999-12-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1999/001092 WO1999065436A1 (fr) 1998-06-17 1999-06-17 Procede pour attacher des rabats barrieres a une feuille externe pour articles absorbants

Country Status (2)

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SE (1) SE511017C2 (fr)
WO (1) WO1999065436A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1084688A2 (fr) * 1999-09-16 2001-03-21 Uni-Charm Corporation Couche-culotte jetable
WO2002013741A1 (fr) * 2000-08-15 2002-02-21 Kimberly-Clark Worldwide, Inc. Procede permettant d'appliquer des elastiques de jambe suivant une courbe au moyen de patins incurves
WO2002013743A2 (fr) * 2000-08-15 2002-02-21 Kimberly-Clard Worldwide, Inc. Procede permettant d'appliquer des elastiques de jambes incurves au moyen de disques rotatifs
WO2013093689A1 (fr) * 2011-12-20 2013-06-27 Kimberly-Clark Worldwide, Inc. Appareil et procédé pour appliquer des parties distinctes à une bande mobile
GB2525594A (en) * 2014-04-28 2015-11-04 Jessica Grace Peterson An absorbent undergarment with a leak barrier

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5531850A (en) * 1994-06-21 1996-07-02 Paragon Trade Brands, Inc. Apparatus and method for applying transverse tensioned elastic
US5576091A (en) * 1994-08-16 1996-11-19 Paragon Trade Brands, Inc. Raised elasticized barrier for absorbent article
WO1998037839A1 (fr) * 1997-02-28 1998-09-03 SCA Mölnlycke AB Article absorbant tel qu'une couche ou une protection d'incontinence

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5531850A (en) * 1994-06-21 1996-07-02 Paragon Trade Brands, Inc. Apparatus and method for applying transverse tensioned elastic
US5576091A (en) * 1994-08-16 1996-11-19 Paragon Trade Brands, Inc. Raised elasticized barrier for absorbent article
WO1998037839A1 (fr) * 1997-02-28 1998-09-03 SCA Mölnlycke AB Article absorbant tel qu'une couche ou une protection d'incontinence

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1084688A2 (fr) * 1999-09-16 2001-03-21 Uni-Charm Corporation Couche-culotte jetable
EP1084688A3 (fr) * 1999-09-16 2001-08-16 Uni-Charm Corporation Couche-culotte jetable
US6527756B1 (en) 1999-09-16 2003-03-04 Uni-Charm Corporation Disposable diaper
WO2002013741A1 (fr) * 2000-08-15 2002-02-21 Kimberly-Clark Worldwide, Inc. Procede permettant d'appliquer des elastiques de jambe suivant une courbe au moyen de patins incurves
WO2002013743A2 (fr) * 2000-08-15 2002-02-21 Kimberly-Clard Worldwide, Inc. Procede permettant d'appliquer des elastiques de jambes incurves au moyen de disques rotatifs
WO2002013743A3 (fr) * 2000-08-15 2002-06-06 Kimberly Clard Worldwide Inc Procede permettant d'appliquer des elastiques de jambes incurves au moyen de disques rotatifs
US6540857B1 (en) 2000-08-15 2003-04-01 Kimberly-Clark Worldwide, Inc. Method of applying curved leg elastics using curved pucks
GB2383522A (en) * 2000-08-15 2003-07-02 Kimberly Clark Co Method of applying curved leg elastics using curved pucks
GB2383522B (en) * 2000-08-15 2004-08-11 Kimberly Clark Co Method of applying curved leg elastics using curved pucks
WO2013093689A1 (fr) * 2011-12-20 2013-06-27 Kimberly-Clark Worldwide, Inc. Appareil et procédé pour appliquer des parties distinctes à une bande mobile
US8813351B2 (en) 2011-12-20 2014-08-26 Kimberly-Clark Worldwide, Inc. Apparatus and method for applying discrete parts to a moving web
GB2525594A (en) * 2014-04-28 2015-11-04 Jessica Grace Peterson An absorbent undergarment with a leak barrier

Also Published As

Publication number Publication date
SE9802166L (sv) 1999-07-19
SE9802166D0 (sv) 1998-06-17
SE511017C2 (sv) 1999-07-19

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