FORFARANDE ATT KONTINUERLIGT SMELTSPINNA ETT DRAGET FLERTRADIGT POLYAMIDGARN VILKET TILLBRINGAS EN LATENT KRYMPNING UTAN ANVENDNING AV SPECIELL KRYMPNINGSUTRUSTNING

摘要

A spin-texture process for producing polyamide yarns is described in which a freshly extruded yarn is passed between two pairs of rotating rolls and then collected. The second pair of rolls (draw rolls) is driven at a peripheral speed greater than that of the first pair of rolls (feed roll and its associated separator roll). The feed roll is maintained and a given temperature which is correlated with other processing conditions to impart a desired level of latent crimp to the yarn. Yarns prepared by the process have a potential bulk of between 10% and 50% and are particularly useful as carpet yarns.