Additional Polymer & Plastic Testing

Hardness Testing, Tensile Testing & More

Tensile testing, hardness testing and other polymer testing services have become much needed additions to the array of materials testing services performed at Laboratory Testing Inc. Products made of polymeric materials are being used more frequently for critical applications in industries such as aerospace, medical, defense and others. Product reliability cannot be left to chance; therefore, the tensile test, hardness test and other testing provide necessary information for material identification, evaluation and selection.

FTIR analysis provides information about the chemical bonds and molecular structure of a material. SEM/EDS analysis is beneficial in structural analysis, identification of contaminants and failure analysis. See our webpages on these services under Polymer Testing. The other types of polymer and plastics testing currently offered at LTI include the tensile test and hardness test.

The Test Processes

Tensile testing – the tensile test measures tensile strength or the stress at which a material breaks or permanently deforms. During a tensile test, a clamped specimen is subjected to a constant rate of tensile loading until it breaks. Typically, tensile testing is performed in accordance with an internationally recognized standard procedure that specifies whether the rate of loading is applied as either a constant rate of extension, constant rate of strain or constant rate of load. At LTI, tensile testing of plastic and other polymeric specimens is performed on a universal testing machine with capacity to 10,000 lbs. The tensile test can be performed on any polymeric material that can be formed or machined into a specimen.

Hardness testing – a hardness test assesses the resistance of a material to permanent indentation by penetration of an indenter into the test sample. LTI uses the Shore Durometer hardness test in accordance with ASTM D2240 to measure hardness of polymeric materials. Since the flexibility of polymers varies, LTI is equipped with various indenters to use for hardness testing different types of materials from elastomers to rigid plastics. This polymer test method determines a material’s hardness value or resistance to indentation.

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“I wanted to take the time to personally thank you for the time and effort that LTI has put into the testing involved with our orders. Your staff has been invaluable over the last several years. Additionally, the fact that you are now able to perform Fracture Toughness testing in house has already proven priceless in both the turnaround time and in getting my questions answered. I’ve been fortunate to have worked with LTI since 1986 and I have come to think of LTI as an extension of Dubose. I look forward to our continued relationship.”

Dave Stepp,
Quality Assurance Manager


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