Textile materials are commonly manufactured to fit complicated and irregular shapes, such as clothing products. Pieces of fabric are usually joined together at seams to construct these shapes. Therefore, most of the time the bulk strength of a fabric is not the only important material property to test, but also the strength of the connecting seams. Seam strength tests can be conducted by both the grab test and strip test methods, depending on the specific application of the product and standard being tested. It is important to also test the elongation properties of the fabric to fully characterize seam elongation. ASTM and ISO have specified standard test methods and specifications for testing the seam strength of many textiles. Popular testing standards are ASTM D751 for coated fabrics, ASTM D1683 for woven apparel fabric, ASTM D4884 for geotextiles, ISO 10321 for geosynthetics, and ISO 13935 for fabric and made-up textiles, such as clothing apparel. The ASTM and ISO test standards specify the appropriate test system configurations of machines and clamps, to properly conduct seam strength tests. Most seam strength tests are conducted using table-top tensile test machines or specially configured universal test machines with low force, high elongation, and constant rate of extension capabilities. Grips must be able to clamp the test sample without slippage or causing damage to the specimen that would cause breakage at the grip jaws. The machine and grip families below can be configured to meet ASTM and ISO requirements, when matched to the force requirements of your test sample and paired with the appropriate grip jaws.

Applicable Testing Standards

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