Dynamic flow process of molten polymer was studied in theory to offer a pressure drop input in the dynamic molding process of molten polymer.

从理论上分析了动态熔体流动过程，为研究聚合物熔体的动态充模过程提供流道系统压力降。

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This fact does not contact the shaft seal surface, it is the sealing principle of polymer cooled to half molten state and forming the seal.

这种密封实际上并不接触轴的表面，它的密封原理是将聚合物冷却到半熔融状态而形成自密封。

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