Disclosed are certain novel polyester compositions particularly useful for shaping or forming into containers and similar shaped articles by thermoforming procedures. The polyester compositions comprise a thermoplastic polyester, an impact modifier and a polyester crystallization rate enhancing component selected from poly(tetramethylene terephthalate) homo- and co-polymers. The polyester compositions exhibit improved crystallization rates as compared to similar compositions not including impact modifier or compositions using other types of crystallization rate enhancing components such as polyolefin-based polymers.
本发明公开了某些新型聚酯组合物,特别适用于通过热成型工艺塑造或成型为容器和类似形状的物品。这些聚酯组合物包括一种热塑性聚酯、一种抗冲改性剂和一种从聚(
对苯二甲酸四亚甲基酯)均聚物和共聚物中选出的提高聚酯结晶速率的成分。与不含抗冲改性剂的类似组合物或使用其他类型结晶速率增强成分(如聚烯烃基聚合物)的组合物相比,聚酯组合物的结晶速率有所提高。