Patent ID: 9029149
Filing Date: 2015-05-12
Classification: A61L,B81C,C12N,D01D,D01F,D10B,Y10T

Abstract:
1. A method of preparing a bead-free, high aspect ratio polymeric fiber comprising: determining an entanglement concentration (C feeding the first polymer solution comprising the first polymer having a concentration of at least C contacting the extruded droplet of polymer solution with a target at a contact point; moving the contact point away from the spinneret, thereby pulling a high aspect ratio polymeric fiber from the extruded droplet of polymer solution at the tip of the spinneret; and further pulling the fiber from the extruded droplet of polymer solution at the tip of the spinneret and feeding the first polymer solution through the spinneret into the extruded droplet of polymer solution at the tip of the spinneret at a rate sufficient to compensate for an amount of the first polymer solution used to produce the fiber, thereby producing a bead-free, high aspect ratio polymeric fiber.