ISO 458 Plastics - Test for Determination of Rigidity in Torsion of Flexible Materials

EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of ISO 458 testing. Specifies a general method for determining stiffness in torsion at various temperatures, particularly below 0°C.

Using the specified test apparatus, an observation of the torque and yaw angle is made after an arbitrarily constant load application time. This procedure is used in selected temperature ranges at a single temperature or within a specified range for the material to be tested. Torsional stiffness is expressed as the apparent torsional modulus of elasticity for each temperature.

Optionally, torque and yaw angle are observed after a constant load application time. This procedure is used at single temperatures or at selected temperature ranges within a specified range for the material to be tested.

For normal laboratory purposes, a substance that is liquid in the desired temperature range for the heat transfer medium is used, provided it can be shown that the liquid does not soften or otherwise affect the test sample. A gaseous environment can be used with special precautions. Good mixing will be ensured by suitable methods during cooling and heating.

Mount the test sample on the machine. The test specimen should be placed between the clamps so that its vertical axis coincides with the axis of rotation of the machine. Wedges can be used for this purpose.

EUROLAB assists manufacturers with ISO 458 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.