Standards:
DIN EN ISO 22088-3
EN ISO 4599
DIN 53449-3
or corresponding standards
ESC, bent strip test
Chemical resistance of plastics in bent strip test Assessment of stress cracking (ESC: Environmental Stress Cracking)
By clamping test specimen across steel templatesand placing them in contact with media, the resistance of a plastic to stress cracking is determined.
There are significant differences in the mechanical properties after storage of the plastics in air and under the influence of chemical agents.
The indicator property to be tested and the medium is determined by the person commissioning the test.
Impact testing based on ISO 179/1fU is normally used as an indicator for the influence of a medium on the mechanical properties of plastics.
Usually, flat test specimen measuring 80 mm x 10 mm x 4 mm are used as standard test specimen for these tests. The test specimens are subsequently clamped across steel templates of different radii. Due to the variation in radii, different outer fiber strains (between 0 % and 2 % in increments of 0.2 %) are produced in the clamped test specimen.
The clamped test specimen are stored for 7 days. Subsequently an impact test in accordance with ISO 179/1fU is carried out.
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