An apparatus for producing spun-bond webs has, beneath the receiving belt, a suction unit having at least two suction zones including a primary suction zone and at least one other suction zone, the primary suction zone receiving most of the filaments from an aerodynamic stretching unit below a spinneret....http://www.google.es/patents/US6932590?utm_source=gb-gplus-sharePatente US6932590 - Apparatus for the continuous production of spun-bond web
Apparatus for the continuous production of spun-bond web
