Two-component loop yarns comprising aramid filaments, manufacture thereof and use thereof

摘要

Two-component loop yarns are composed of core and effect filaments, at least part of the core component consisting of aromatic polyamides, wherein the aromatic polyamides contain the structural repeat units of the formulae I and II-OC-Ar1-CO-NH-Ar2-NH-(I)-OC-Ar1-CO-NH-Ar3-NH-(II),where Ar1, Ar2 and Ar3 are each independently of the others a bivalent mono- or polycyclic aromatic radical whose free valences are disposed para or meta or comparably parallel, coaxial or angled to each other, and Ar2 and Ar3 each have different individual meanings within the scope of the given definitions, and the respective monomer components underlying the polymer are selected so as to produce an aromatic polyamide which forms preferably isotropic solutions in organic solvents.