An apparatus and a method for the melt extrusion of a molten thermoplastic polymer, e.g., as fibers and nonwoven webs, which apparatus and method utilize ultrasonic energy to assist in the melt-extrusion process. The apparatus includes a die housing which defines a chamber adapted to receive the molten...http://www.google.es/patents/US6395216?utm_source=gb-gplus-sharePatente US6395216 - Method and apparatus for ultrasonically assisted melt extrusion of fibers
Method and apparatus for ultrasonically assisted melt extrusion of fibers
