Great Lakes Rubber’s test laboratory supports compound development, quality control, and product development with full lot trace-ability and product attribute SPC. Rubber testing is carried out according to ASTM standards. Our testing capabilities include:

  • Rheology – Measures the viscoelastic properties of a rubber compound during the cure process. This test reflects rubber flow properties during molding.

  • Tensile Strength – Determines the force required per unit of material cross section to cause a break. Elongation is another value obtained from the same test that reflects the rubber’s ability to stretch without breaking.
  • Hardness – Using a Shore durometer gauge, hardness is measured according to a rubber’s resistance to indentation. A rubber’s hardness is critical depending on its application.
  • Dispersion Quality – Quantifies the surface roughness of a freshly cut rubber specimen using an optical microscope camera. The incorporation of fillers into a rubber matrix is characterized by their macro-dispersion as an indicator of the quality of mixing.
  • Compression Set – Used to describe a rubber’s ability to rebound to its original state, compression set is often useful in sealing applications where a low compression set aids in repeatability of sealing performance.
  • Bond Strength – In applications where rubber must be bonded to a substrate, bond strength testing is critical to ensure good, strong bond.
  • Chemical Compatibility – Evaluates the ability of a rubber to withstand the effects of liquids. Depending on the rubber polymer type, different rubbers will display different compatibility with a particular chemical so it is critical to choose the right type for the application.