Since the correlation between the test results of the national standard GB/T7141-2008 "plastic heat aging test method" and the actual use environment has not been determined, these results are only used for comparison and rating. A variety of physical and chemical changes can occur in degradable plastics exposed to thermal environments. The length of exposure and the temperature determine the extent and type of change. Short exposure periods of high temperatures are usually sufficient to shorten the induction period of oxidatively degradable plastics, which can result in the consumption of antioxidants and plasticizers. So, what properties change during the induction period? Physical properties such as tensile strength, impact strength, elongation and modulus may cause changes during the induction period; however, these changes are usually not due to a decrease in molecular weight. It is simply a response that varies with temperature, such as increased crystallinity or reduced volatiles or both. The performance changes we observe depend on the measured performance, and different performance may not change at the same rate. In most cases, extreme properties (such as breaking strength or elongation at break) are more sensitive to degradation than most properties (such as modulus). Later Xiaobian will continue to explain the application and impact of plastic heat aging test in real life, please continue to pay attention to this site! Dumplings Production Equipment Helper Food Machinery has more than 30 years of experience in the development and production of pasta processing equipment. According to the requirements of different capacity and dumpling shapes, various types of dumpling forming machines have been designed and produced. The main models include steaming dumpling equipment, quick-freezing dumpling machine, Russian dumpling machine, fried dumpling equipment and other complete dumpling production equipment series. Dumpling Making Machines,Dumpling Forming Machine,Dumpling Production Line,Frozen Dumpling Line,Fried Dumpling Line,Steamed Dumpling Line Helper Machinery Group Co., Ltd. , https://www.ihelpergroup.com
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