Reinforced thermally stable hybrid yarn
AssigneeSA Schappe
InventorsJean Guevel, Guy Bontemps
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Abstract
The inventive yarn comprises at least one strand (2) having a reinforcing core made of high-modulus and high-resistance staple-fiber yarn, which is made from organic or inorganic material, and a sheath (4) of long or short, low-modulus standard fibers. The other strands (5) are made from long or short, low-modulus standard fibers and are arranged so as to protect the sheath of the strand(s) having a reinforcing core.
Claims10
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:
- 0.85α Tt<αKac<0.9α Tt
- in which:
- Kac=twist of the strand with a reinforcing core (t/m);
- Tt=titer of the conventional strand (Nm);
- α=twist coefficient with 80<α<110.
Dependencies are inferred from the claim text.