Investigation of the geometric change of plastic articles made by polyamide

Abstract

The following paper includes an investigation of the geometric variation of plastic workpieces in a simulated environment of normal climate by 21° / 50% relative humidity. In the industrial manufacturing, the daily quality checks are required to determine, if the plastic workpieces can be released. Due to the humidity or water absorption, the plastic workpiece grows so far that the dimensional accuracy is not given. In this investigation, the results of 12 weeks are determined and presented.