Recherche Images Maps Play YouTube Actualités Gmail Drive Plus »
Connexion
Les utilisateurs de lecteurs d'écran peuvent cliquer sur ce lien pour activer le mode d'accessibilité. Celui-ci propose les mêmes fonctionnalités principales, mais il est optimisé pour votre lecteur d'écran.

Brevets

  1. Recherche avancée dans les brevets
Numéro de publicationUS20070212436 A1
Type de publicationDemande
Numéro de demandeUS 10/575,299
Numéro PCTPCT/FR2004/002753
Date de publication13 sept. 2007
Date de dépôt26 oct. 2004
Date de priorité31 oct. 2003
Autre référence de publicationCN1875140A, EP1682713A1, EP1682713B1, WO2005042821A1
Numéro de publication10575299, 575299, PCT/2004/2753, PCT/FR/2004/002753, PCT/FR/2004/02753, PCT/FR/4/002753, PCT/FR/4/02753, PCT/FR2004/002753, PCT/FR2004/02753, PCT/FR2004002753, PCT/FR200402753, PCT/FR4/002753, PCT/FR4/02753, PCT/FR4002753, PCT/FR402753, US 2007/0212436 A1, US 2007/212436 A1, US 20070212436 A1, US 20070212436A1, US 2007212436 A1, US 2007212436A1, US-A1-20070212436, US-A1-2007212436, US2007/0212436A1, US2007/212436A1, US20070212436 A1, US20070212436A1, US2007212436 A1, US2007212436A1
InventeursFrederic Noelle
Cessionnaire d'origineFrederic Noelle
Exporter la citationBiBTeX, EndNote, RefMan
Liens externes: USPTO, Cession USPTO, Espacenet
Machine For The Production Of A Finished Non-Woven
US 20070212436 A1
Résumé
A machine for the production of a nonwoven, comprises a spun-bond tower and a conveyor, a consolidation device, a vacuum for expressing the moisture from the web, and an applicator for applying a product to the web downstream of the vacuum are provided.
Images(2)
Previous page
Next page
Revendications(7)
1-5. (canceled)
6. A machine for the continuous production of a nonwoven, comprising a spun-bond tower depositing filaments as a web onto a conveyor and a device for consolidating the web, by water jets, characterized by a moisture-expressing means downstream, in the direction in which the web moves, of the consolidation device and by an applicator for applying a product to the web downstream of the expressing means.
7. A machine according to claim 6, wherein the expressing means comprises a vacuum device for subjecting the web to a suction effect.
8. A machine according to claim 7, wherein said vacuum device provides a vacuum of between about 40 millibar and about 700 millibar.
9. A machine according to claim 6, wherein the expressing means comprises a device for drying the web downstream of the product applicator.
10. A machine according to claim 6, wherein the product applicator is a foam applicator or a lick-roll applicator.
11. A machine according to claim 6, wherein the applicator is a device for applying longitudinal bands.
Description
  • [0001]
    The present invention relates to machines for the production of nonwovens, comprising one or more spun-bond towers and optionally one or more melt-blown heads depositing filaments and optionally fibres as a web onto a conveyor. The web thus deposited, and still fragile, is then sent to a water-jet consolidation station.
  • [0002]
    One drawback of these machines is that the web that emerges therefrom cannot be sent continuously to a product application unit.
  • [0003]
    The invention remedies this drawback.
  • [0004]
    The subject of the invention is therefore a machine for the continuous production of a nonwoven, comprising a spun-bond tower depositing filaments as a web onto a conveyor and a device for consolidating the web, characterized by a moisture-expressing means downstream, in the direction in which the web moves, of the consolidation device and by an applicator for applying a product to the web downstream of the expressing means.
  • [0005]
    According to one embodiment, the expressing means consists simply of a second conveyor over which the web passes, a vacuum device being provided between the upper and lower runs of said second conveyor, said device giving for example a vacuum of between 40 and 700 millibar and subjecting the web to a suction effect.
  • [0006]
    Thanks to this, it is now possible to make webs consisting of hydrophobic filaments, for example made of polypropylene, polyethylene or metallocene, to continuously undergo a subsequent treatment with a surfactant and/or a binder and/or a lubricant and/or a swelling agent and/or a dye, or a continuous printing operation, the expressing of the moisture being sufficient for the product applied by the applicator to be correctly applied to the web even if the latter consists of hydrophobic filaments.
  • [0007]
    The upper run of the second conveyor is given a length such that, depending on the speed with which the web passes, the moisture content of the web becomes less than 70% by weight, better still less than 50% and even better less than 20% upon exiting the second conveyor. This moisture content is in general between 10% and 70% by weight. Unlike what a drying unit would give, it is greater than 10%. In general, the residence time of the web on the second conveyor may be less than 2 seconds for a conveyor whose upper run has a length of for example 2m.
  • [0008]
    The machine may include, downstream of the product applicator, a device for drying the web, this drying device possibly being made less substantial by the fact that a good part of the moisture has already been expressed in the expressing means.
  • [0009]
    The product applicator is preferably a foam applicator or a lick-roll applicator or a spray applicator, these accommodating a residual moisture content of the web.
  • [0010]
    Preferably, for hygiene products, especially for nappies, the application takes place in longitudinal bands, thereby creating, for example, an alternation of hydrophilic and hydrophobic longitudinal regions.
  • [0011]
    In Patent Application EP-0 072 961 it is provided not to express the moisture from a nonwoven web, that is to say to expel some of the water by a mechanical means, but to dry a nonwoven web, that is to say to eliminate almost all of the water therefrom by a supply thermal energy.
  • [0012]
    The single FIGURE of the appended drawing illustrates the invention.
  • [0013]
    The FIGURE is a schematic sectional representation of a machine according to the invention.
  • [0014]
    It comprises a spun-bond tower having an extruder for extruding an organic polymer melt that feeds a die 1 for producing a curtain of filaments F, a cooling zone 2 for solidifying the extruded filaments, at least on the surface, a suction device 3 in the form of a chamber in which the curtain of filaments is subjected to the action of high-velocity streams of air that draw the filaments, and a diffuser 4 allowing, at the exit of the suction device, the stream of air to be deflected and slowed down and the filaments F to be distributed in a random fashion as a web, which is deposited on the upper run 5 of an endless first conveyor 6. The filaments are in the form of a bundle of filaments F, lying perpendicular to the plane of the FIGURE.
  • [0015]
    Mounted above the upper run 5 is a horizontal drum 7 with an internal vacuum device shown symbolically by the letter A. The lateral surface of the drum 7 is perforated. The drum is rotated about its axis. The drum is surrounded by an apertured sleeve. Two injectors 8 project pressurized water jets onto the lateral face of the drum, it being possible for the web of filaments to pass between the drum 7 and the injectors 8 and thus to be consolidated. The jets may have a diameter of between 80 and 170 microns. The number of jets per metre may be between 1000 and 5000 and the water pressure in the injectors may be between 10 and 400 bar, while the vacuum in the drum 7 may be between minus 20 millibar and minus 200 millibar, and the drum 7 may be driven at a speed of between 1 and 400 m/min. The web then passes onto the upper run 9 of a second conveyor 10 in order to reach a second drum 11 of the same structure and same operation as the drum 7. From the drum 11, the web passes onto a drum 12 provided, like the drum 11, with injectors. The drum 12 is similar to the drum 11 in its structure and in its operation.
  • [0016]
    On leaving the drum 12, the web is sent directly to a third conveyor 15 provided with a moisture-expressing device 16, namely a box in which a 600-millibar vacuum is created, said box being interposed between the upper run and the lower run of the third conveyor 15. The upper face of the box has a slit extending transversely, facing the entire web passing over the conveyor and via which the moisture is sucked out therefrom. The upper run has a length of 3 m. The web passes along this at a speed of 200 m per minute.
  • [0017]
    Downstream of this conveyor is an applicator 17 for applying an ennobling product, which comprises an actual product application station 18, a drying station 19 and a wind-up station 20.
  • [0018]
    A ready-to-use nonwoven is thus continuously obtained.
Citations de brevets
Brevet cité Date de dépôt Date de publication Déposant Titre
US3750237 *10 févr. 19727 août 1973Johnson & JohnsonMethod for producing nonwoven fabrics having a plurality of patterns
US3800364 *10 févr. 19722 avr. 1974Johnson & JohnsonApparatus (discontinuous imperforate portions on backing means of closed sandwich)
US4504650 *5 déc. 198312 mars 1985General Electric CompanyCopolyetherimides and process of preparation
US4623575 *7 févr. 198518 nov. 1986ChicopeeLightly entangled and dry printed nonwoven fabrics and methods for producing the same
US4879170 *18 mars 19887 nov. 1989Kimberly-Clark CorporationNonwoven fibrous hydraulically entangled elastic coform material and method of formation thereof
US4931355 *18 mars 19885 juin 1990Radwanski Fred RNonwoven fibrous hydraulically entangled non-elastic coform material and method of formation thereof
US4939016 *18 mars 19883 juil. 1990Kimberly-Clark CorporationHydraulically entangled nonwoven elastomeric web and method of forming the same
US4950531 *18 mars 198821 août 1990Kimberly-Clark CorporationNonwoven hydraulically entangled non-elastic web and method of formation thereof
US5290628 *21 avr. 19931 mars 1994E. I. Du Pont De Nemours And CompanyHydroentangled flash spun webs having controllable bulk and permeability
US5295997 *10 juil. 199222 mars 1994Perfojet S. A.Process for the production of a cotton-based, washable nonwoven cloth and cloth thus obtained
US5320900 *10 août 199314 juin 1994E. I. Du Pont De Nemours And CompanyHigh absorbency cleanroom wipes having low particles
US5369858 *19 août 19926 déc. 1994Fiberweb North America, Inc.Process for forming apertured nonwoven fabric prepared from melt blown microfibers
US5393304 *4 nov. 199328 févr. 1995Perfojet SaWashable spunlace non-woven cotton-based cloth
US5396689 *4 févr. 199414 mars 1995Perfojet SaProcess for obtaining a composite textile structure based on nonwoven fibrous sheets
US5405650 *22 juin 199411 avr. 1995Johnson & Johnson Inc.Method for manufacturing a non-woven fabric marked with a print
US5414914 *30 mars 199216 mai 1995Uni-Charm CorporationProcess for producing apertured nonwoven fabric
US5718022 *27 déc. 199517 févr. 1998Icbt PerfojetMethod for making a nonwoven fabric lap using pressurized water jets, and apparatus therefore
US5727292 *13 févr. 199617 mars 1998Icbt PerfojetInstallation for the production of nonwoven webs, the cohesion of which is obtained by the action of fluid jets
US5768756 *30 avr. 199623 juin 1998Icbt PerfojetProcess and device for manufacturing a non-woven unpatterned textile
US6007653 *31 mai 199628 déc. 1999Upm-Kymmene OyjManufacturing method and nonwoven material
US6063717 *6 oct. 199516 mai 2000Nippon Petrochemicals Company Ltd.Hydroentangled nonwoven fabric and method of producing the same
US6110848 *9 oct. 199829 août 2000Fort James CorporationHydroentangled three ply webs and products made therefrom
US6270623 *22 déc. 19987 août 2001Uni-Charm CorporationMethod for making apertured nonwoven fabric
US6314627 *29 juin 199913 nov. 2001Polymer Group, Inc.Hydroentangled fabric having structured surfaces
US6460233 *9 janv. 20018 oct. 2002Rieter PerfojetProcess for the production of a complex nonwoven material and novel type of material thus obtained
US6903034 *30 déc. 19997 juin 2005Polymer Group, Inc.Hydroentanglement of continuous polymer filaments
US20010005926 *9 janv. 20015 juil. 2001Frederic NoelleProcess for the production of a complex nonwoven material and novel type of material thus obtained
US20020157766 *29 nov. 200131 oct. 2002Rieter PerfojetProcess for producing a nonwoven material, plant for implementing it and nonwoven thus obtained
US20020168910 *28 juin 200214 nov. 2002Rieter IcbtMethod for producing a complex nonwoven fabric and resulting novel fabric
Classifications
Classification aux États-Unis425/71
Classification internationaleD04H3/11, D04H3/16
Classification coopérativeD04H18/04, D04H3/11, D04H3/16
Classification européenneD04H3/16, D04H3/11, D04H18/04
Événements juridiques
DateCodeÉvénementDescription
11 nov. 2006ASAssignment
Owner name: RIETER PERFOJET, FRANCE
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NOELLE, FREDERIC;REEL/FRAME:018508/0615
Effective date: 20060331