Poly-trimethylene terephthalate solid core fibrillation-resistant filament having a substantially triangular cross section, a spinneret for producing the filament, and a carpet made therefrom

摘要

In a first aspect the invention is a solid core fibrillation-resistant, synthetic polymeric filament having three substantially equal length convex sides. The sides through substantially rounded tips centered by a distance “a” from the axis of the filament. Each rounded tip has a radius substantially equal to a length “b”. Each tip lies on a circumscribed circle having a radius substantially equal to a length (a + b) and the midpoint of each side lies on an inscribed circle having a radius substantially equal to a length “c”. The filament has a denier-per-filament in the range 10 “dpf” 35; the distance “a” lies in the range 0.00025 inches (6 micrometers) “a” 0.004 inches (102 micrometers); the distance “b” lies in the range from 0.00008 inches (2 micrometers) “b” 0.001 inches (24 micrometers); the distance “c” lies in the range from 0.0003 inches (8 micrometers) “c” 0.0025 inches (64 micrometers); and the modification ratio (“MR”) lies in the range from about 1.1 “MR” about 2.0. In still another aspect the present invention is directed to a spinneret plate having a plurality of orifices formed therein for forming the solid core fibrillation-resistant, synthetic polymeric filament. Each orifice has a center and three sides with each side terminating in a first and a second end point and with a midpoint therebetween. The sides can be either concave or linear connected by either a circular or a linear end contour.