Stress Crack: Standard PET Industry 28 Day Test Method
| Sample Type | Required Quantity | Equipment Used |
| Bottles |
50 |
Carbonator |
Purpose
This procedure evaluates the performance of PET bottles when they are
dipped in a stress agent and then subjected to high temperature and
high humidity conditions.
Description
Bottles are carbonated to a predetermined elevated CO2
level and then placed in the 100°F, 85% RH chamber overnight. These
bottles are then dipped in a stress crack agent such that the entire
base of the bottle is covered with the agent. The bottles are then
placed back into the 100°F, 85% RH chamber for a period of 28 days.
During this period, bottles are examined daily and all breakers, leakers
and pressure loss bottles are recorded and removed from the chamber. At
the conclusion of the 28 days, the remaining bottles are removed and
checked for pressure to assure that none were missed during the 28 days
of the test. A report of the bottle performance is then created.
← Go back to Plastic Materials Testing
PTI delivers innovation, development and comprehensive technical services to progressive companies engaged in plastic packaging.
Contact
Phone: +41 24 423 9530
Fax: +41 24 423 9531
E-Mail