Abstract
AbstractTheoretical equations based on force diagrams were developed in order to explain pouch behaviour during a restrained burst test. According to the resulting equation, P = 2 S/D, the burst pressure (P) increases directly with seal strength (S) and inversely with the distance between the restraining plates (D). After performing a restrained burst test and a peel test on Tyvek/plastic pouches, it was found that the theoretical development did not exactly explain burst test results in terms of peel test values. The test results demonstrate that even though the peeling times for the peel and burst tests were controlled to be the same, the theoretical formula (P = 2 S/D) tends to overestimate the burst pressure. The overestimation increases at smaller gaps. These results are an indication that the formula is not universal and they suggest that it is an oversimplification. It might work for some materials at a particular set of testing conditions but not for others. Copyright © 2001 John Wiley & Sons, Ltd.
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