ISO 20753:2018 塑料 试验样品

标准编号：ISO 20753:2018

中文名称：塑料 试验样品

英文名称：Plastics — Test specimens

发布日期：2018-10

标准范围

本文件规定了用塑料材料制备的用于模塑加工的试样，以及用板材或成型制品机加工制备的试样的尺寸要求。它汇编了用于获取可比数据的试样以及其他常用试样的名称和尺寸。规定了以下类型的试样:a） A1型和A2型试样（1=注射成型，2=从板材或成型制品加工而成）这些是拉伸试样，通过简单的机械加工，可以从中获取各种其他试验的试样（见附录a）。A1型试样是一种多用途试样。多用途试样的主要优点是，它允许所有试验实验室在可比模塑件的基础上进行附录a中提到的所有试验方法。因此，测量的特性是一致的，因为所有特性都是使用以相同方式制备的类似试样测量的。换句话说，可以预期，由于无意中不同的模制条件，给定试样组的试验结果不会有明显变化。另一方面，如果需要，可以评估模塑条件和/或试样的不同状态对所有测量性能的影响，不会有困难。还描述了Axy型缩比试样，其中x是表示试样制备方法的数字（1=注塑，2=从板材或成型制品加工），y是表示比例系数（1:y）的数字。例如，当全尺寸试样不方便时，或当样品材料仅少量存在时，可以使用这些方法。b） b型标本这些是棒材试样，可以直接模制，也可以从A1型试样的中心部分或板材或成型制品加工而成。c） c型标本这些是可直接模制或机加工的小型拉伸试样，例如，从板材（D型或F型试样）、A1型试样的中心部分或从板材或成型制品。d） D1型和D2型试样这些是厚度分别为1毫米和2毫米的方形板。e） F型试样这些是用于分析机械各向异性的矩形板。如果本文件中未提及特定类型的试样，这并不意味着有任何排除试样使用的意图。如果经常使用，将来可以添加其他类型的试样。

This document specifies dimensional requirements relating to test specimens prepared from plastics materials intended for processing by moulding, as well as to test specimens prepared by machining from sheets or shaped articles. It compiles the designations and dimensions of test specimens used for the acquisition of comparable data and also of other frequently used specimens.

The following types of test specimen are specified:

a) Type A1 and type A2 specimens (1 = injection moulded, 2 = machined from a sheet or shaped article)

These are tensile test specimens from which, with simple machining, specimens for a variety of other tests can be taken (see Annex A).

The type A1 specimen is a multipurpose test specimen. The principal advantage of a multipurpose test specimen is that it allows all the test methods mentioned in Annex A to be carried out by all test laboratories on the basis of comparable mouldings. Consequently, the properties measured are coherent as all are measured using similar specimens prepared in the same way. In other words, it can be expected that test results for a given set of specimens will not vary appreciably due to unintentionally different moulding conditions. On the other hand, if desired, the influence of moulding conditions and/or different states of the specimens can be assessed without difficulty for all of the properties measured.

Also described are reduced-scale test specimens designated type Axy, where x is the number indicating the method of specimen preparation (1 = injection moulded, 2 = machined from a sheet or shaped article) and y is a number indicating the scale factor (1:y). These can be used e.g. when full-sized test specimens are not convenient or when sample material exists in small quantities only.

b) Type B specimens

These are bar specimens which can be directly moulded or can be machined from the central section of type A1 specimens or from sheets or shaped articles.

c) Type C specimens

These are small tensile test specimens which can be directly moulded or machined, e.g. from plates (Type D or type F specimens), from the central section of type A1 specimens or from sheets or shaped articles.

d) Type D1 and type D2 specimens

These are square plates of thickness 1 mm and 2 mm, respectively.

e) Type F specimens

These are rectangular plates intended for use in the analysis of mechanical anisotropy.

If a particular type of test specimen is not mentioned in this document, this does not mean that there is any intention to exclude the use of the specimen. Additional specimen types can be added in future if they are commonly used.

标准预览图