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
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.
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