| 摘要 |
<p>The invention relates to a polyester yarn, an impregnated cord including it, and to a process for preparing said yarn, used in very high speed tires. According to the invention, the yarn comprises polyester filaments having a factor of amorphous orientation distribution Fad of at least 1.4. The claimed impregnated cord exhibits a tenacity as specified elongation TASE 5% of at least 140 mN/tex at a temperature of 20°C. The claimed process consists in extruding the melted polyester through spinning orifices in a spinneret, there resulting melt-spun filaments which solidify and then they are drawn at a winding speed of 6,800...8,000 m/min in order to form stretched filaments.</p> |
