Patent ID: 6855420
Filing Date: 2005-02-15
Classification: D01D,D01F,Y10T

Abstract:
1. A synthetic bicomponent filament having a multilobal cross-section, a filament factor of about 2 or greater, wherein the filament factor is determined according to the following formula: wherein K 1 is 0.0013158; K 2 is 2,1; K 3 is 0.45; A is 1.5; B is 2.7; C is 0.35; D is 1.4; E is 1.3; MR is R/r 1 , wherein R is the radius of a circle centered in the middle of the cross-section and circumscribed about the tips of the lobes, and r 1 is the radius of a circle centered in the middle of the cross-section and inscribed within the cross-section about the connecting points of the lobes; N is the number of lobes in the cross-section; DPF is the denier per filament; LAF is (TR)*(DPF)*(MR) 2 , wherein TR is r 2 /R, wherein r 2 is the average radius of a circle inscribed about the lobes, and R is as set forth above, and DPF and MR are as set forth above; and AF is 15 minus the lobe angle, wherein the lobe angle is the average angle of two tangent lines laid at the point of inflection of curvature on each side of the lobes of the filament cross-section, and an average tip ratio of > about 0.2, and further wherein said filament is comprised of at least one melts-pinnable polymer selected from the group consisting of polyester, polyamides, polyolefins, and combinations thereof.