| 摘要 |
Improvements in creating resilient high denier polypropylene yarns are provided. Generally, high denier polypropylene yarns exhibit poor resiliency (such as crush resistance, for example, when utilized as carpet face yarns) that effectively prevents widespread use in articles that require high degrees of resiliency. As a result, higher cost, but more resilient, yarns, such as polyesters or polyamides, have found greater acceptance in such end-use articles. Furthermore, previous attempts at texturing high denier polypropylene fibers have failed to attain suitable resilience levels therein is insufficient to permit proper return to initial shape and/or length after impact. It has now surprisingly been determined that such high denier polypropylene yarns can be produced with certain nucleating additives that permit requisite degrees of shape and length retention, and thus acceptable resilience levels to permit cost-effective replacement of more expensive polyester or polyamide yarns in certain end-use applications. |
