当前,汽车用专用树脂和塑料的国产化程度还很小,国产车塑料部件所用树脂和专用料大部分仍依靠进口。甚至聚丙烯树脂因品种和质量上的原因,也还有相当的进口份额。 造成这种状况主要有以下几个方面的原因。 一是过去树脂生产厂长期对牌号开发和更新不太重视,汽车专用树脂牌号的开发近几年才刚刚开始。二是汽车零配件用塑料专用料质量要求 At present, the degree of localization of special resins and plastics for automobiles is still very small, and most of the resins and special materials used in plastic parts for domestic cars still rely on imports. Even polypropylene resin has a considerable share of imports due to variety and quality reasons. There are mainly the following reasons for this situation. First, in the past, the resin production plant has paid less attention to the development and updating of grades. The development of special grades of automotive resins has only just begun in recent years. The second is the quality requirements for plastic special materials used for automobile parts and accessories