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Numéro de publicationUS20060150377 A1
Type de publicationDemande
Numéro de demandeUS 10/533,881
Numéro PCTPCT/EP2003/013310
Date de publication13 juil. 2006
Date de dépôt26 nov. 2003
Date de priorité27 nov. 2002
Autre référence de publicationCA2507605A1, CN1717515A, CN100465366C, EP1424425A1, EP1565604A1, WO2004048667A1
Numéro de publication10533881, 533881, PCT/2003/13310, PCT/EP/2003/013310, PCT/EP/2003/13310, PCT/EP/3/013310, PCT/EP/3/13310, PCT/EP2003/013310, PCT/EP2003/13310, PCT/EP2003013310, PCT/EP200313310, PCT/EP3/013310, PCT/EP3/13310, PCT/EP3013310, PCT/EP313310, US 2006/0150377 A1, US 2006/150377 A1, US 20060150377 A1, US 20060150377A1, US 2006150377 A1, US 2006150377A1, US-A1-20060150377, US-A1-2006150377, US2006/0150377A1, US2006/150377A1, US20060150377 A1, US20060150377A1, US2006150377 A1, US2006150377A1
InventeursUwe Bornmann, Albert Mittermayr, Alois Punkenhofer
Cessionnaire d'origineUwe Bornmann, Albert Mittermayr, Alois Punkenhofer
Exporter la citationBiBTeX, EndNote, RefMan
Liens externes: USPTO, Cession USPTO, Espacenet
Method for the production of geotextiles from melt-spun fibers
US 20060150377 A1
Résumé
The invention relates to a method for the production of geotextiles from melt-spun fibers. The melt-spun endless fibers are continuously transported in an unimpeded manner on a screen belt along all hardening and post treatment zones.
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Revendications(7)
1. Method for the production of geotextiles of melt-spun filaments through hydrodynamic intertwining, wherein the melt-spun filaments are deposited onto a continuous screen band, are transported on this screen band through the first curing stage, wherein the filaments additionally during the entire process are fixed through suction zones on the screen band and in this manner are already sufficiently cured in the first curing stage, such that the transport free of disturbance without a transport band is possible.
2. Method as claimed in claim 1, wherein the screen band is guided through all curing stages.
3. Method as claimed in claim 1 wherein the suction zones an underpressure of 1 to 100 mbar is applied.
4. Method as claimed in claim 1 wherein the mesh size of the screen band is 1-8 cm−1 if the curing takes place through the screen band.
5. Method as claimed in claim 1 wherein the mesh width of the screen band is 10-100 cm−1 if the screen band serves as a support.
6. Apparatus for the production of geotextiles of melt-spun filaments, wherein beneath the deposition apparatus is guided a screen band, to which suction zones are applied and the screen band is guided up to the first curing device.
7. Geotextiles produced according to a method as claimed in claim 1.
Description
  • [0001]
    The invention relates to a method for the production of geotextiles of melt-spun filaments, wherein the melt-spun continuous filaments are continuously and free of disturbances transported on a screen band across all curing and post-treatment zones.
  • [0002]
    DE 196 27 256 discloses a method for the hydrodynamic intertwining of filaments of a filament web, in which a multiple needling takes place with alternating guidance of the goods web and the transfer from one to the other transport device takes place through the continuous and strain-free support of the filament web.
  • [0003]
    For this purpose the filament web is supported during the transport from one bearing surface to the other by an accompanying continuous web.
  • [0004]
    EP 0 859 076 discloses a device for the hydrodynamic entwining of fibers of a filament web, wherein for the more intense curing in the first needling unit to the continuous web is assigned a continuous web guided in the direction opposite to the continuous web transporting the filament web, and the fiber web is increasingly densified in the conical gap generated between the continuous webs.
  • [0005]
    Both methods are intended to avoid disturbances in the not yet sufficiently cured filament web.
  • [0006]
    However, the first disturbances in the filament occur already after the filaments are deposited during the transport to the first curing zone.
  • [0007]
    The invention addresses the problem of providing a method for the deposition and subsequent hydrodynamic entwining of the filaments, in which a disturbance of the filament web immediately after the deposition of the filaments before the first curing zone is also avoided.
  • [0008]
    Subject matter of the invention is therefore a method for the production of geotextiles of melt-spun filaments through hydrodynamic intertwining, characterized in that the melt-spun filaments are deposited on a continuous screen band, are transported on this screen band through the first curing stage, wherein the filaments additionally during the entire process are fixed on the screen band through suction zones and in this way are already sufficiently cured in the first curing stage in order for the transport without transport band to be possible.
  • [0009]
    The melt-spun filaments are thus initially deposited on the continuous screen band in the conventional manner and on this screen band transported to the first curing stage. The deposited filaments are therein fixed during the transport on the screen band through suction zones such that no disturbances can occur during the transport of the uncured filaments. The air speed of the air taken up is 1-15 m/s.
  • [0010]
    Depending on the disposition of the curing device, in the first curing stage the water jets act through the screen band and/or the screen band serves as a support.
  • [0011]
    For the embodiment variant of the curing through the screen band, the filter has a mesh size of 1-8 cm−1, preferably 2-5 cm−1.
  • [0012]
    If the screen band serves as a support {mat}, the screen band has a mesh size of 10-100 cm−1, preferably 20-60 cm−1.
  • [0013]
    After curing in the first curing stage, the geotextile is sufficiently cured, such that it can be guided without disturbances of the structure even without the support of a transport band. However, the filter can optionally also be guided through possible further curing stages.
  • [0014]
    On the screen band thus the formation of the non-woven material as well as also the curing take place.
  • [0015]
    Through this method it is possible to avoid any disturbance in the structure of the not yet cured geotextile after it has been deposited.
  • [0016]
    Therefore complex process controls such as for example the alternate guidance can therefore be avoided.
  • [0017]
    The geotextiles produced in this manner are distinguished by high homogeneity and uniformity.
  • [0018]
    Filaments to be considered are all melt-spinnable raw materials, for example polyolefins, such as polypropylene, polyamides or polyesters.
  • [0019]
    Further subject matter of the invention is an apparatus for the production of geotextiles of melt-spun filaments, characterized in that beneath the deposition apparatus a screen band is guided, on which are applied suction zones and the screen band is guided to the first curing device.
  • [0020]
    Such apparatus are depicted in FIG. 1 and FIG. 2.
  • [0021]
    In the drawing depict:
    • 1 filament curtain
    • 2 uncured non-woven material
    • 3 transport zone with suction
    • 4 compacting band
    • 5 water jet curing unit
    • 6 suction
    • 7 spinning band
    • 8 cured geotextile
Citations de brevets
Brevet cité Date de dépôt Date de publication Déposant Titre
US3434188 *6 janv. 196725 mars 1969Du PontProcess for producing nonwoven fabrics
US3601860 *26 févr. 196931 août 1971Schuller W H WMethod of and apparatus for forming a web of fibrous material
US4070816 *23 nov. 197631 janv. 1978Tba Industrial Products LimitedYarn manufacturing
US4089720 *28 nov. 197516 mai 1978Monsanto CompanyMethod and apparatus for making a nonwoven fabric
US5023130 *14 août 199011 juin 1991E. I. Du Pont De Nemours And CompanyHydroentangled polyolefin web
US5369858 *19 août 19926 déc. 1994Fiberweb North America, Inc.Process for forming apertured nonwoven fabric prepared from melt blown microfibers
US5382400 *21 août 199217 janv. 1995Kimberly-Clark CorporationNonwoven multicomponent polymeric fabric and method for making same
US5761778 *26 févr. 19979 juin 1998Fleissner Gmbh & Co. MaschienefabrikMethod and device for hydrodynamic entanglement of the fibers of a fiber web
US6471910 *22 mars 200029 oct. 2002Hills, Inc.Nonwoven fabrics formed from ribbon-shaped fibers and method and apparatus for making the same
US7530147 *26 nov. 200412 mai 2009Rieter Automatik GmbhMachine for production of non-woven material, adjustment procedure for the same and non-woven material produced thus
US20030134560 *4 juin 200117 juil. 2003Bevan Christopher GrahamFormation of sheet material using hydroentanglement
Classifications
Classification aux États-Unis28/104
Classification internationaleD04H3/007, D04H3/11, D04H3/011, D04H18/04, D04H18/02
Classification coopérativeD04H3/11, D04H3/011, D04H3/007, D04H18/04
Classification européenneD04H18/04, D04H3/007, D04H3/011, D04H3/11
Événements juridiques
DateCodeÉvénementDescription
8 nov. 2005ASAssignment
Owner name: POLYFELT GES.M.B.H., AUSTRIA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BORNMANN, UWE;MITTERMAYR, ALBERT;PUNKENHOFER, ALOIS;REEL/FRAME:017193/0038
Effective date: 20050613
11 mars 2008ASAssignment
Owner name: TENCATE GEOSYNTHETICS AUSTRIA GESELLSCHAFT M.B.H.,
Free format text: CHANGE OF NAME;ASSIGNOR:POLYFELT GESELLSCHAFT M.B.H.;REEL/FRAME:020669/0123
Effective date: 20071126