标准编号：ISO 16770:2019
中文名称：塑料 聚乙烯环境应力开裂（ESC）的测定 全缺口蠕变试验（FNCT）
英文名称：Plastics — Determination of environmental stress cracking (ESC) of polyethylene — Full-notch creep test (FNCT)
发布日期：2019-09
标准范围
This document specifies a method for determining the environmental stress cracking (ESC) resistance
of polyethylene (PE) materials in a defined test environment. The test is carried out on notched test
specimens machined from moulded sheets/specimens or from finished products. The test specimen is
subjected to a static tensile load when immersed into an environment such as a surfactant solution held
at a specified temperature. The time to failure is measured.
The method has been specifically developed for polyethylene materials but can be used to evaluate PE
products, such as pipes, fusion welds/fittings and blow-moulded PE containers to study the effect of
aggressive environments, i.e. dangerous goods and chemicals.
The method is suitable for use with test specimens moulded to chosen dimensions or machined
from compression moulded sheets or injection moulded specimens, or from finished products, such
as mouldings and pipes. When the test specimens are machined from extruded or moulded parts,
the results can be affected not only by properties of the material, but also by stresses or orientation
introduced during processing.
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