本文集中就聚酯类工程塑料合金的品种、结构和性能关系，探讨相关的制备要点，并介绍其典型产品的应用特点。

This article discusses the different types, structure and functions of these polyesters engineering plastics as well as their applications.

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综述了PET工程塑料合金化方面的主要研究开发情况，就PET／PBT、PET／PC、PET／聚酯聚醚、PET／尼龙、PET／PE等合金的研究及应用情况作了简单介绍。

In this paper, research & development of PET engineering plastics about ALLOY have been reviewed. The research & pr0duce of PET/PBT. PET/PC. PET/Polyether-ester was introduced.

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介绍新型工程塑料pen及其合金的性能和生产状况，重点介绍PEN在包装业的研究及应用进展。

The properties, production and development of PEN and its blend are introduced, especially its application in the packing field.

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