Method for the production of geotextiles from melt-spun fibers

Abstract

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.

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.