本文件规定了测定熔融塑料拉伸和断裂特性的方法。该方法涉及在规定的挤压温度和拉伸条件下，测量熔融纤维变形时产生的力。 数据是在非等温和非均匀变形条件下生成的。然而，这对于解释拉伸流动中聚合物的行为是有用的。 该方法适用于热塑性塑料模塑和挤出材料，这些材料可以使用毛细管挤出流变仪或带有毛细管杆模具的挤出机或其他挤出设备进行挤出，并且具有足够的熔体强度，可以轻松处理。 该方法适用于化学稳定的材料，这些材料生产出均匀的挤出物，不含异质性、气泡、未熔融杂质等。 此方法可以提供以下信息: -所有挤压技术的可加工性， -机械和热历史的影响，以及 -化学结构的影响，如分支、纠缠和分子质量。 该技术是可用于测量材料拉伸流动行为的多种技术之一。这种测量方法不一定再现热塑性塑料在加工过程中所受的拉伸条件。

This document specifies a method for determining the drawing and break characteristics of molten plastics. The method involves the measurement of the force generated in deforming a molten filament under defined extrusion temperature and drawing conditions. Data is generated under non-isothermal and non-homogeneous deformation conditions. However, it is useful for the interpretation of polymer behaviour in extensional flow. The method is suitable for thermoplastics moulding and extrusion materials that can be extruded using a capillary extrusion rheometer, or an extruder with capillary rod die or other extrusion devices and have sufficient melt strength to be handled without difficulty. The method is applicable to chemically stable materials that produce a uniform extrudate free from heterogeneities, bubbles, unmelted impurities, etc. This method can provide information on — processability for all extrusion techniques, — the effect of mechanical and thermal history, and — the effect of chemical structure, such as branching, entanglements and molecular mass. This technique is one of a number of techniques that can be used to measure the extensional flow behaviour of a material. This method of measurement does not necessarily reproduce the drawing conditions to which thermoplastics are subjected to during their processing.