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Tensile / Pull Test

This test is designed to determine the maximum tensile strength of the material. This may be further defined as the maximum energy the material can withstand before breaking in a tensile fashion. Tensile strength is expressed in units of force such as Newtons (N) or kilograms/meter.

Stretch at break is defined as the measured elongation of a test specimen at the moment of rupture expressed as a percentage of the initial test length.

Tensile energy absorption (TEA) is the total work done per unit area on a specimen when stretching it to rupture.

Pull Testing

Pull testing is the process used to measure seal strength to pull apart two bonded surfaces. Testing is done for a number of reasons including material selection, sealer and sterilization validation as well as shelf life validation. It is often used in the medical device industry to measure and quantify the strength of seals on medical pouched products as well as other sealed flexible packages.

Typical Procedures/Protocols

ASTM D2221

WESTPAK Capabilities

(9) Tensile testers with capacity to 4500 Kg (10K lbs.)