ASTM D7030-04 Short Term Creep Performance of Corrugated Fibreboard Containers under constant load

Scope:

Empty paper corrugated shipping containers are put to test. A compression load is applied vertically for a given time period, the resistance of the test container to the applied load is determined by the procedure defined by ASTM D7030-04. Pelletized/unitized loads can also be tested. Testing is done keeping in mind that such boxes are often stacked up one over the other. A fixed platen compression testing equipment is used to exert a fixed static load under specified atmospheric conditions. The failure of corrugated containers can be thus obtained using this standard testing method.

Test Procedure:

The constant load to be exerted on the container under test is selected. The specimen is placed at the center of the bottom platen of the testing apparatus. The test load is placed on the specimen. The climatic conditions specified for the test are to be maintained throughout the entire duration of the compression creep test. The deflection versus time data is recorded for a given time period. The recommended test time is 12 h.

Specimen size:

The test is conducted on empty containers. Specimen size may vary according to the apparatus being used for testing.

Data:

R= R12×P/(100-P)
where:
R12 = average creep rate in 12-h test (slope of straight line
fitted to creep data), and
P = load level expressed as a percent of Test Method D642 compression strength.
T= D/R
where:
T = time to fail,
D = failure deflection, and
R = adjusted creep rate.