BS EN ISO 20028-2:2017规定了试样制备方法和标准试验方法 用于测定热塑性聚酯模塑和挤出材料的性能。 处理试验材料和在模制前调节试验材料的要求 并给出了试验前的试样。在规定状态下制备试样的程序和条件以及 给出了制作这些试样的材料的测量特性。 属性和 用于表征热塑性聚酯模塑和成型的合适和必要的试验方法 列出了挤压材料。这些性能是从ISO 10350-1中的通用试验方法中选择的。中国的其他试验方法 还包括对这些模塑和挤压材料的广泛使用或特别重要的用途 在本文件中，以及ISO 20028-1（粘度和编号）中规定的指定特性 拉伸弹性模量）。为了获得可重复和可比较的试验结果，有必要使用以下方法: 规定的试样制备和调节、试样尺寸和试验程序 在此确定的值不一定与使用试样获得的值相同 不同的尺寸或使用不同的程序制备。交叉引用:ISO 62ISO 75-2ISO 291ISO 527-2ISO 294-1ISO 1133-2ISO 1183-1ISO 1183-2ISO 1183-3ISO 1628-5ISO 3451-2ISO 4589-2ISO 10350-1ISO 11357-2ISO 11357-3ISO 11359-2ISO 20753IEC 60093IEC 60112IEC 60243-1IEC 60250IEC 60296IEC 60695-11-10ISO 178ISO 179-1ISO 3167购买本文件时可提供的所有现行修订版。

BS EN ISO 20028-2:2017 specifies the methods of preparation of test specimens and the standard test methods to be used in determining the properties of thermoplastic polyester moulding and extrusion materials. Requirements for handling test material and for conditioning both the test material before moulding and the specimens before testing are given.Procedures and conditions for the preparation of test specimens in a specified state and procedures for measuring properties of the materials from which these specimens are made are given. Properties and test methods which are suitable and necessary to characterize thermoplastic polyester moulding and extrusion materials are listed.The properties have been selected from the general test methods in ISO 10350-1. Other test methods in wide use for or of particular significance to these moulding and extrusion materials are also included in this document, as are the designatory properties specified in ISO 20028-1 (viscosity number and tensile modulus of elasticity).In order to obtain reproducible and comparable test results, it is necessary to use the methods of specimen preparation and conditioning, the specimen dimensions and the test procedures specified herein. Values determined will not necessarily be identical to those obtained using specimens of different dimensions or prepared using different procedures.Cross References:ISO 62ISO 75-2ISO 291ISO 527-2ISO 294-1ISO 1133-2ISO 1183-1ISO 1183-2ISO 1183-3ISO 1628-5ISO 3451-2ISO 4589-2ISO 10350-1ISO 11357-2ISO 11357-3ISO 11359-2ISO 20753IEC 60093IEC 60112IEC 60243-1IEC 60250IEC 60296IEC 60695-11-10ISO 178ISO 179-1ISO 3167All current amendments available at time of purchase are included with the purchase of this document.