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 solidcore fibrillation-resistant, synthetic polymeric filamenthaving three substantially equal length convex sides. Thesides through substantially rounded tips centered by adistance "a" from the axis of the filament. Each roundedtip has a radius substantially equal to a length "b". Eachtip lies on a circumscribed circle having a radiussubstantially equal to a length (a + b) and the midpoint ofeach side lies on an inscribed circle having a radiussubstantially equal to a length "c". The filament has adenier-per-filament in the range 10 "dpf" 35; thedistance "a" lies in the range 0.00025 inches (6micrometers) "a" 0.004 inches (102 micrometers); thedistance "b" lies in the range from 0.00008 inches (2micrometers) "b" 0.001 inches (24 micrometers); thedistance "c" lies in the range from 0.0003 inches (8micrometers) "c" 0.0025 inches (64 micrometers); andthe modification ratio ("MR") lies in the range fromabout 1.1 "MR" about 2Ø In still another aspect thepresent invention is directed to a spinneret plate having aplurality of orifices formed therein for forming the solidcore fibrillation-resistant, synthetic polymeric filament.Each orifice has a center and three sides with each sideterminating in a first and a second end point and with amidpoint therebetween. The sides can be either concaveor linear connected by either a circular or a linear end