Package seal strength testing shows the peel separation force required to separate two flexible materials that are bonded together. This test is also called a T-Peel test.
Testing the seal on a sterilization pouch (Sterile Barrier System).
Test the seal on food packaging
Determine the packaging's ability to protect product with the package.
Ease of opening for the user.
Adherence to design specifications.
Confirm the reproducibility of the sealing process. Create a baseline to screen for changes negatively affecting the packaging seal.
Determining if hot tack is creating a good seal.
ASTM F88/F88M Standard Test Method for Seal Strength of Flexible Barrier Materials
ASTM D1876 Standard Test Method for Peel Resistance of Adhesives (T-Peel Test)
Ends of the T-Peel sample are clamped using vice grips and pulled using a motorized test stand until the sample as separated. The force required to separate the samples is recorded.
Manual test stands are sometimes used for budgetary reasons. Ideally a motorized test stand is used because a constant rate of speed can be used. A manually test stand would not be according to ASTM standards for this type of test.
Pneumatic is the better choice than manual vice grips when running a higher quantity of tests.
Typically a 1 inch wide sample is used for this test and a sample cutter is used to cut these samples.