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Heat distortion temperature

Heat distortion temperature

In the case of rigid thermoplastics, the heat distortion temperature is frequently specified as the Vicat softening temperature (VST) to ISO 306 or the heat deflection temperature (HDT) to ISO 75.

These measurement methods are not suitable for thermoplastic polyurethanes such as Desmopan®, since the measured values display a pronounced dependence on the Shore hardness and therefore have no information value.

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