ISO 20753-2008 塑料.试样

标准号：ISO 20753-2008
中文标准名称：塑料.试样
英文标准名称：Plastics - Test specimens
标准类型：G31
发布日期：2008/3/1 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：G31
国际标准分类号：83.080.01
引用标准：ISO 293;ISO 294-1;ISO 295;ISO 2818;ISO 10350-1;ISO 10350-2;ISO 10724-1;ISO 11403-1;ISO 11403-2;ISO 11403-3
适用范围：1.1 This International Standard specifies dimensional requirements relating to test specimens preparedfrom plastics materials intended for processing by moulding, as well as to test specimens prepared bymachining from sheets or shaped articles. It gives, in one document, the designations and dimensions of testspecimens used for the acquisition of comparable data and also 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 corresponds to the ISO 3167:2002 type 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 (l: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 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.If a particular type of test specimen is not mentioned in this International Standard, this does not mean thatthere is any intention to exclude the use of the specimen. Additional specimen types may be added in future ifthey are commonly used.