Burst Strength Test
ASTM F1140 Standard Test Method for Internal Pressurization Failure Resistance of Unrestrained Packages
To perform a burst strength test, a package is pressurized until it bursts. The burst test is performed by pressurizing the package until the internal pressure causes it to burst. This test method determines the ability of an open or closed package to withstand internal pressurization.
ASTM standards provide for several test methods for burst testing, including dynamic, static, creep, and creep to fail tests. These tests are used to measure the strength of medical device package sterile barrier systems as well as other flexible packaging to determine the weakest points of a package design.
Burst testing measures the pressure at which packaging will burst. It is important to note that this application is ideal for packages where you are making all seals, not just a closure seal. Some examples would be a thermoform tray or a form-fill-seal application. Burst testing is typically more attractive for in-process testing because it is faster than other methods. A limitation to burst testing is the inability to trend seal strength of a specific package location over time. PCL has the ability to perform restrained and unrestrained burst testing.