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HONGJIN
Application：
The specimen is stretched at room temperature and then cooled to a sufficiently low temperature at which no retraction occurs after the tensile force is removed. The tensile force is then released, and the temperature is increased at a uniform rate. The temperature at which the specified retraction percentage occurs is recorded.This instrument is designed in accordance with GB/T 7758-2002 Vulcanized Rubber — Determination of Low-Temperature Properties — Temperature Retraction Method (TR Test) and related national standards. It is a newly developed refrigeration system based on mechanical compression technology.The equipment adopts cascade compression refrigeration technology and applies the principles of thermal balance combined with circulating agitation, enabling automatic, uniform cooling and precise constant-temperature control of the specimens.
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