Patent ID: 6887568

Claim:
A thermally stable hybrid yarn, comprising at least one strand produced with a reinforcing core made of a high-modulus high-strength fiber spun yarn based on an organic or inorganic material and a cover made of conventional, long or short, low-modulus fibers, the other strands being made of conventional, long or short, low-modulus fibers, these other strands being designed to protect the cover of the one or more strands with a reinforcing core, wherein the hybrid yarn satisfies a twist balancing condition according to the formula: 0.85Î± T t <Î±K ac <0.9Î± T t in which: K ac =twist of the strand with a reinforcing core (t/m); T t =titer of the conventional strand (Nm); Î±=twist coefficient with 80<Î±<110.