Pira Consulting
Packaging Testing
Closure release torque
Pira use a Mecmesin Orbis digital closure torque tester for measuring application and removal closure torques, calibrated in accordance with ASTM D3474.
Applicable standard test methods include:
ASTM D2063, “The torque retention of continuous thread closures on containers, with matching finishes, for predetermined environmental conditions over time” and
ASTM D3198, “Standard Test Method for Application and Removal Torque of Threaded or Lug-Style Closures”.
Leak resistance of closures
Closures applied to nominal application torque are routinely tested for resistance to leakage after storage at elevated temperature, simulated transit vibration or vacuum testing as detailed in ASTM D4991 “The testing of empty containers for resistance to leakage under differential pressure conditions such as those which can occur during air transport”.
The causes of leakage can be investigated by dimensional analysis of the container and closure thread dimensions with the aid of a non-contact optical measuring stage.
Sports closure testing (BSDA Code of Practice)
The BSDA “Code of Practice for Sports Closures” sets out the tests needed to demonstrate due diligence for sports closures.
Pira are able to test closures to all aspects of the code, including the rotational opening force test which was developed by Pira (see “Fruit Shoot” case study).
Related testing
For further information contact
Doug Leatherdale
T +44 (0)1372 802108
M
F +44 (0)1372 802245