Patent ID: 6544456
Filing Date: 2003-04-08
Classification: D01F,Y10T

Abstract:
Method for the production of melt-spun fibers or filaments comprising polyethylene terephthalate as a fiber-forming polymer, through polycondensation or melting of the fiber-forming polymer forming a melt and subsequently melt spinning, the method comprising mixing 0.1-4 wt %, relative to the fiber-forming polymer, of a second polymer consisting essentially of polymethyl methacrylate with a weight average molecular weight of about between 20,000 and 200,000 g/mol, with the fiber-forming polymer before the melt spinning and dispersing the second polymer in the fiber-forming polymer forming unoriented melt fibers, and during the melt spinning, a spinning speed of the fibers is set at up to 8000 m/min, whereby through the inclusion in the unoriented melt fibers, extruded from a spinneret, rod-shaped inclusions of the second polymer with a lateral particle size of less than 800 nm are obtained.