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crc潤滑劑的作用

日期：2025-08-31 19:15

浏覽次數：3904

摘要：

　　crc潤滑劑之所以能起润滑作用，是因为crc潤滑劑的加入，降低丫塑料熔体的摩擦，这种摩擦又分内摩擦和外摩擦两类。由此相应有内潤滑劑和外潤滑劑。

　　1、外潤滑劑的作用主要是改善聚合物熔料与设备的热金属表面的摩擦状况，使塑件容易脱模，它与聚合物的相容性较差，容易从熔料中往外迁移，在成型过程中能在熔料与模具间形成一层很薄的隔离膜，使塑料不粘住模具表面。

　　2、内潤滑劑与聚合物有良好的相容性，它在聚合物内部起着降低聚合物分子间内聚力的作用，从而改善塑料熔料的内摩擦生热和熔体的流动性。内潤滑劑和聚合物长链分子间的结合是不强的，它们可能产生类似于滚动轴承的作用，因此其自身能在熔体流动方向上排列，从而互相滑动，使得内摩擦力降低，这就是内润滑的机理。

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