THERMOPLASTIC POLYMER COMPOSITION CONTAINING BLACK IRON OXIDE

摘要

Disclosed herein is a thermoplastic polymer composition comprising a blend o f a thermoplastic polymer admixed with from about to 50 ppm black iron oxide particles, based on the amount of said thermoplastic polymer. The black iron oxide is admixed with the polymer in order to speed up the process of repeating parisons formed from t he polymer during bottle manufacturing. The composition has the beneficial combination of a large percent repeat rate improvement (RIV) with only a small decrease in transparency (.DELTA.L*). The ratio of RIV.DELTA.L* is significantly better than carbon black-polymer blends having similar RIV.