EP0372120A2 - Dispositif pour revêtir de colle des fils élastiques - Google Patents

Dispositif pour revêtir de colle des fils élastiques Download PDF

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Publication number
EP0372120A2
EP0372120A2 EP88121253A EP88121253A EP0372120A2 EP 0372120 A2 EP0372120 A2 EP 0372120A2 EP 88121253 A EP88121253 A EP 88121253A EP 88121253 A EP88121253 A EP 88121253A EP 0372120 A2 EP0372120 A2 EP 0372120A2
Authority
EP
European Patent Office
Prior art keywords
adhesive
threads
guide grooves
application head
elastic threads
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP88121253A
Other languages
German (de)
English (en)
Other versions
EP0372120A3 (fr
Inventor
Henning J. Claassen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nordson Corp
Original Assignee
Nordson Corp
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 Nordson Corp filed Critical Nordson Corp
Publication of EP0372120A2 publication Critical patent/EP0372120A2/fr
Publication of EP0372120A3 publication Critical patent/EP0372120A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
    • B05C3/02—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
    • B05C3/12—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length
    • B05C3/132—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating work of indefinite length supported on conveying means

Definitions

  • the invention relates to a device for applying an adhesive to elastic threads of the type specified in the preamble of claim 1.
  • Rippled, sheet-like structures when heated are used in particular as elastic bundles for disposable clothing, for example for nuclear facilities, but also for elastic bandages, bandages and hygiene articles, such as diapers, in order to achieve tight, but elastically deformable closures.
  • films or foils made of an inelastic, thermoplastic polymer, in particular based on ethylene vinyl acetate (EVA) copolymers are used, which are laminated onto the pre-stretched elastomer threads from both sides.
  • EVA ethylene vinyl acetate
  • DE-GM 88 06 965 discloses a device for producing such a flat structure, in which a melt adhesive layer is at least partially applied to the unwound substrate or to the elastic threads by means of a melting device.
  • the associated application head can be provided with a melt nozzle or a spray nozzle for applying the hot melt adhesive.
  • DE-PS 37 07 349 describes a method for permanently connecting stretchable thread-like or ribbon-like elements on a flat substrate, in which the thread-like or ribbon-like element arranged or fixed on the flat substrate is covered with a sprayed hot melt adhesive or is sprayed; the hot melt adhesive also affects the neighboring areas of the thread-like or ribbon-like element, that is to say the adjacent substrate areas, so that the hot melt adhesive consumption becomes relatively high, since hot melt adhesive is also located on the areas between the threads which are not required for the bonding itself .
  • the invention is therefore based on the object of providing a device for applying a hot melt adhesive to elastic threads of the type specified, in which the disadvantages mentioned above do not occur.
  • an application device is to be proposed which, in comparison with the previously customary embodiments, enables relevant adhesive savings.
  • the advantages achieved with the invention are based on the fact that at the time of applying the adhesive, the elastic threads are guided and positioned very precisely, so that the adhesive can be applied specifically to the threads and not to the surface areas between the individual threads. In this way, an adhesive saving of 30 to 40% can be achieved in comparison with the conventional techniques.
  • the elastic threads coated with the adhesive can be optically identified; This enables an additional quality control to be implemented, for example by assigning different thread types to differently colored adhesives, so that one can immediately see from the coloring whether it is a specific type.
  • the application head can now be arranged in the immediate vicinity of the substrate to be coated with the threads, so that the heat emanating from the warm adhesive is immediately dissipated via the threads to the substrate to be coated.
  • the application head is arranged at a maximum distance of 2 mm above the material web to be coated, for example a polyethylene web in the manufacture of diapers, the perfect coating of the even with mechanical contact between the web and application head individual threads, which are located in the guide grooves of the application head, is possible.
  • the guide grooves can have any cross sections, for example semicircular or rectangular shapes. Particularly at high thread speeds, however, there is a risk that the threads will be pressed from one side to the other side by the "hydraulic effect" of the adhesive in such guide grooves and thereby coated unevenly.
  • guide grooves are used which have the shape of an isosceles, in particular equilateral triangle in cross section, since this results in an automatic centering of the elastic threads in the triangular guide grooves.
  • the device shown in FIG. 1, generally indicated by the reference numeral 10, for producing a sheet that curls when heated, such as is used, for example, for hygiene articles, has a rotatable roller 12 which has a polyethylene web 14, a nonwoven web 16 and pre-stretched elastic threads 18 are each fed in the direction of the arrows and thereby connected to one another.
  • an application head 20 In the transport direction of the polyethylene web 14, in front of the roller 12, there is an application head 20, to which a liquefied and thus flowable adhesive, in particular a hot melt adhesive, is fed from an adhesive source (not shown).
  • the underside of the application head 20 is at a maximum distance of 2 mm above the top of the polyethylene web 14.
  • the application head 20 is provided on its underside with guide grooves for the threads 18. These guide grooves are somewhat larger in cross section than the threads 18, so that the threads 18 are largely received in the guide grooves and only protrude slightly beyond the underside of the application head 20.
  • the guide grooves in the underside of the application head can have 20 different shapes; two guide grooves 22a with a semicircular cross section are shown in FIG. 2, two guide grooves 22b with a rectangular cross section are shown in FIG. 3, and two guide grooves 22c with a triangular cross section are shown in FIG.
  • FIGS. 2 to 4 also show the outlet slots 24a (FIG. 2), 24b (FIG. 3) and 24c (FIG. 4) and a plurality of feed openings 26a (FIG. 2), 26b (FIG. 3) and 26c (FIG. 4) for the adhesive indicated in each guide groove 22a, 22b and 22c.
  • the polyethylene web 14 is passed under the underside of the application head 20 at a short distance, which should be a maximum of 2 mm.
  • the threads 18 run individually through the corresponding guide grooves 22a (FIG. 2), 22b (FIG. 3) or 22c (FIG. 4), so that the threads 18 are enveloped uniformly from all sides by the adhesive 28 indicated by the hatched area, which emerges from the slots 24a, 24b and 24c and the openings 26a, 26b and 26c.
  • Each thread 18 is therefore embedded in an adhesive tube which forms between the guide groove and the polyethylene web 14.
  • the adhesive supply is clocked, so that only short pieces of thread are provided with the adhesive, as can be seen in FIG. 1, where the individual adhesive areas on the threads 18 are indicated by the reference numerals 30.
  • the threads 18 coated with the adhesive 28 come either directly below the application head 20 or, viewed in the transport direction, just behind the application head 20 into contact with the polyethylene web 14 and are then fed together to the roller 12, where the nonwoven web 16 is on the top the polyethylene web 14 is laminated on; as a result, the elastic threads 18 provided with the adhesive are located between the nonwoven web 16 and the polyethylene web 14.
  • FIG. 5 shows two elastic threads 18, the polyethylene web 14, the nonwoven web 16 and the adhesive 28 which connects the threads 18 to the two webs 14, 16.
  • the threads 18 have a relatively large play in semicircular or rectangular guide grooves, so that they can be displaced in the guide grooves by the hydraulic effect of the adhesive and thus coated unevenly.
  • FIG. 4 A preferred embodiment is therefore shown in FIG. 4, namely guide grooves 22c, which have the shape of an isosceles, in particular equilateral triangle in cross section.
  • the feed openings 26c for the adhesive are located at the three corners of the triangle, in order in this way to ensure a uniform coating of the elastic threads 18 over their entire surface.

Landscapes

  • Coating Apparatus (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
EP88121253A 1988-12-07 1988-12-19 Dispositif pour revêtir de colle des fils élastiques Withdrawn EP0372120A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8815242U DE8815242U1 (de) 1988-12-07 1988-12-07 Vorrichtung zum Auftragen eines Klebstoffes auf elastische Fäden
DE8815242U 1988-12-07

Publications (2)

Publication Number Publication Date
EP0372120A2 true EP0372120A2 (fr) 1990-06-13
EP0372120A3 EP0372120A3 (fr) 1990-08-01

Family

ID=6830563

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88121253A Withdrawn EP0372120A3 (fr) 1988-12-07 1988-12-19 Dispositif pour revêtir de colle des fils élastiques

Country Status (2)

Country Link
EP (1) EP0372120A3 (fr)
DE (1) DE8815242U1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7578882B2 (en) 2003-01-22 2009-08-25 Nordson Corporation Module, nozzle and method for dispensing controlled patterns of liquid material
US7647885B2 (en) 2002-04-12 2010-01-19 Nordson Corporation Module, nozzle and method for dispensing controlled patterns of liquid material
WO2014085117A1 (fr) * 2012-11-27 2014-06-05 The Procter & Gamble Company Procédé et appareil d'application d'un matériau élastique à un substrat mobile dans une trajectoire incurvée
US9248054B2 (en) 2012-11-27 2016-02-02 The Procter & Gamble Company Methods and apparatus for making elastic laminates
US9265672B2 (en) 2012-11-27 2016-02-23 The Procter & Gamble Company Methods and apparatus for applying adhesives in patterns to an advancing substrate
US9682392B2 (en) 2012-04-11 2017-06-20 Nordson Corporation Method for applying varying amounts or types of adhesive on an elastic strand
US12233170B2 (en) 2018-10-09 2025-02-25 The Procter & Gamble Company Absorbent article comprising a lotion resistant polymeric filler composition

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1502746A (fr) * 1966-08-03 1967-11-24 Rhodiaceta Procédé et dispositif pour le traitement, par un liquide, de fils ou de bandes en mouvement
US3762142A (en) * 1970-03-03 1973-10-02 O Rasmussen Yarnlike product kept together by circumjacent polymer material, and a method and an apparatus for producing said product
JPS515113B1 (fr) * 1971-06-14 1976-02-17
CH632118B (de) * 1980-07-09 Heberlein & Co Ag Verfahren und vorrichtung zum benetzen und anschliessenden texturieren von textilgarnen.
JPS58180601A (ja) * 1982-04-14 1983-10-22 ユニ・チヤ−ム株式会社 使い捨ておむつ
FR2539274A1 (fr) * 1983-01-19 1984-07-20 Boussac Saint Freres Bsf Procede de fabrication de couches-culottes a jeter et couches-culottes obtenues
DE3701941A1 (de) * 1987-01-23 1988-08-04 Dittberner Gmbh Auftragskopf

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7647885B2 (en) 2002-04-12 2010-01-19 Nordson Corporation Module, nozzle and method for dispensing controlled patterns of liquid material
US9855583B2 (en) 2002-04-12 2018-01-02 Nordson Corporation Method for dispensing controlled patterns of liquid material
US8800477B2 (en) 2002-04-12 2014-08-12 Nordson Corporation Module, nozzle and method for dispensing controlled patterns of liquid material
US7578882B2 (en) 2003-01-22 2009-08-25 Nordson Corporation Module, nozzle and method for dispensing controlled patterns of liquid material
US9682392B2 (en) 2012-04-11 2017-06-20 Nordson Corporation Method for applying varying amounts or types of adhesive on an elastic strand
US9265672B2 (en) 2012-11-27 2016-02-23 The Procter & Gamble Company Methods and apparatus for applying adhesives in patterns to an advancing substrate
US9248054B2 (en) 2012-11-27 2016-02-02 The Procter & Gamble Company Methods and apparatus for making elastic laminates
US9295590B2 (en) 2012-11-27 2016-03-29 The Procter & Gamble Company Method and apparatus for applying an elastic material to a moving substrate in a curved path
CN104812346A (zh) * 2012-11-27 2015-07-29 宝洁公司 用于在弯曲路径中向移动的基底施加弹性材料的方法和设备
US9730839B2 (en) 2012-11-27 2017-08-15 The Procter & Gamble Company Method and apparatus for applying an elastic material to a moving substrate in a curved path
US9808827B2 (en) 2012-11-27 2017-11-07 The Procter & Gamble Company Methods and apparatus for applying adhesives in patterns to an advancing substrate
WO2014085117A1 (fr) * 2012-11-27 2014-06-05 The Procter & Gamble Company Procédé et appareil d'application d'un matériau élastique à un substrat mobile dans une trajectoire incurvée
US10729593B2 (en) 2012-11-27 2020-08-04 The Procter & Gamble Company Methods and apparatus for making elastic laminates
US12233170B2 (en) 2018-10-09 2025-02-25 The Procter & Gamble Company Absorbent article comprising a lotion resistant polymeric filler composition

Also Published As

Publication number Publication date
DE8815242U1 (de) 1990-05-10
EP0372120A3 (fr) 1990-08-01

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