The heat deflection temperature or heat distortion temperature (HDT, HDTUL, or DTUL) is the temperature at which a polymer or plastic sample deforms under a specified load. This property of a given plastic material is applied in many aspects of product design, engineering, and manufacture of products using thermoplastic components.
Read more about Heat Deflection Temperature: Determination, Design, Injection Molding
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—Vladimir Nabokov (1899–1977)
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—Hermann Hesse (1877–1962)