Plastic and composites are polymers with substances added to improve performance or reduce costs. Plastics may be cast, pressed, or extruded into film, sheet, fiber or fiber reinforced, glass fiber, plate, tubes, bottles, and boxes. Thermosetting or thermohardening plastic can be hard or brittle and temperature resistant. Thermosets include epoxy resins, polyester resins, phenolic resins and polyurethane and non-deformable and non-meltable. Plastics, polymers and composites can be tensile tested to measure product quality. Tensile tests measure the load required to break a plastic test sample and specimen stretch or elongation to that breaking load. The resulting test data helps specify materials, design parts to withstand forces, and key quality control checks for materials. Plastic composite tensile test equipment, testers and electromechanical universal test machines feature constant rate of crosshead extension or CRE because plastics tensile test behavior is time rate test speed dependent. Plastic tensile coupons (dogbone-shaped specimens with defined width and load stress psi) are made to ASTM, EN, DIN and ISO tensile test sample dimensions. Plastics composite tensile tester machine speed should always rely on standard specifications. Plastic tensile test standards ASTM D638 and ISO 527 both require axial extensometers to measure strain below 20 percent extension values. High travel or strain can be measured by the machine crosshead or digital encoder. Thin film sheet samples should follow ASTM D882. TestResources tensile test equipment is modular and configured by our applications engineer to match your specific material, sample type and test method. Our product line includes a wide variety of test machines, test software, grips, test fixtures, extensometers, sample preparation aids, and environmental chambers for all of your plastic testing needs. Call us today to discuss your test application at 800.430.6536.

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