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Adhesive Materials: Testing Adhesives

Posted on 6/6/2013 1:34:35 PM By ASC
  

For evaluating an adhesive, three strength categories are key: peel strength, tack strength, and sheer strength. ASTM International, formerly the American Society for Testing and Materials, and the International Organization for Standardization (ISO) are organizations that provide standards to evaluate structural adhesives that bond materials in automotive, aerospace, electrical, medical, and construction applications. Tests include the Wedge-Peel test (ISO 11343), Peel or Stripping Strength of Adhesive Bonds (ASTM D903), Standard Test Methods for Loop Tack (ASTM D6195), Standard Test Method for Apparent Shear Strength of Single-Lap-Joint Adhesively Bonded Metal Specimens by Tension Loading (ASTM D1002). Each uses standardized conditions for the adhesive surface area and substrates, then subjects the bond to peeling or sheering forces. For some tests, a range of conditions may be evaluated, for example varying temperature or varying speed for impact-based tests.