Westpak is certified to conduct product/package integrity testing to help guarantee successful delivery of products worldwide by any means of transportation.

Westpak is accredited to ISO/IEC 17025-2005, one of the most rigorous standards available for a mechanical testing laboratory.

Westpak is certified to the requirements of ISO 9001-2008 for quality management, and to ISO 14001-2004 for environmental management and sustainability efforts.

Tensile / Pull Testing

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

Westpak continually upgrades and expands its equipment line-up. Therefore this list is a minimum of our capabilities:

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