ISO 17855-2:2016规定了试样的制备方法以及用于确定聚乙烯（PE）模塑和挤出材料性能的试验方法。给出了处理试验材料和在成型前调节试验材料和试验前调节试样的要求。 还给出了制备试样的程序和条件以及测量这些试样所用材料性能的程序。列出了适用于表征PE模塑和挤出材料的性能和测试方法。 这些性能是从ISO 10350‑1中的一般测试方法中选择的。ISO 17855的这一部分还包括对这些模塑和挤塑材料广泛使用或具有特殊意义的其他测试方法，以及ISO 17855‑1中规定的指定性能。 为了获得可重复和可比较的测试结果，有必要使用本文规定的制备和调节方法、试样尺寸和测试程序。确定的值不一定与使用不同尺寸的试样或使用不同程序制备的试样获得的值相同。

This document specifies the methods of preparation of test specimens and the test methods for determining the properties of polyethylene (PE) moulding and extrusion materials. It gives requirements for handling test material and for conditioning both the test material before moulding and the specimens before testing. This document specifies the procedures and conditions for the preparation of test specimens and procedures for measuring properties of the materials from which these specimens are made. Properties and test methods that are suitable and essential to characterize PE moulding and extrusion materials are listed. The properties in this document have been selected from the general test methods in ISO 10350-1. Other test methods in wide use for or of particular significance to PE moulding and extrusion materials are also included in this document, as are the designatory properties specified in ISO 17855-1. Properties of slow crack growth, etc. are specified in documents of polyethylene (PE) materials for piping systems. The methods of preparation and conditioning, the specimen dimensions and the test procedures specified herein are used to obtain reproducible and comparable test results. Values determined will not necessarily be identical to those obtained using specimens of different dimensions or prepared using different procedures.