About Physical Testing Methods

Physical testing methods can include dimensional analysis, determination of a material's density or specific gravity, or measuring a materials strength under a tensile load, for example.  These properties of polymers are key to specifying the correct resins and to verifying that the resin you received meets the specifications to which it was purchased.

  • Approaches

    Standard test methods are available for many of the physical tests.  At SGS PSI, these include:

    • Tensile (ASTM D638, D412, D882)
    • Compression (ASTM D695)
    • Flex (ASTM D790)
    • Friction (ASTM D1894)
    • Dimensional Analysis
    • Hardness (ASTM D2240, E18)-includes Rockwell
    • Density (ASTM D792, D1505)
    • Tear (ASTM D1004)
    • Lap Shear (ASTM D1002)
    • Compression Set (ASTM D395)
    • Izod Impact (ASTM D256 & D4812, ISO 180)
    • Charpy Impact (ASTM D6110, ISO 179)

    In some cases, a client wants to measure a physical property on their product rather than on a standard test piece.  At SGS PSI, we specialize in developing test methods to apply to your product.  Examples include friction and compression testing of implants along with tensile testing of a molded part which required embedding in an epoxy in order to grip without breaking.

  • Sample Considerations

    Sample considerations will vary depending on the test method used.  

    For many physical tests, 5 replicates are required, with extra parts requested for test setup.

    Tyipcally, molded parts or slabs are needed.

    Contact us to talk through your testing needs and sample considerations.

  • Products We've Tested

    We have over 25 years experience testing a wide variety of products and materials with physical test methods.  Below is a brief list, which demonstrates the diversity in our abilities to meet our clients needs.

    • Implants for friction
    • Orthopedic screws for compression in PBS
    • Dimensional Analysis on bullets
    • Density on pellets/resin
    • Density on grocery bags to determine composition [density gradient]
    • Human Placenta for tensile properties
    • Sporting goods
    • Cure in Place Pipe
    • O-Rings