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In this article, three different treatment routes were applied and analyzed after injection molding to study the roles of boiling water bath and re-drying in improving the dimensional accuracies and mechanical properties of a plate that was made of PA66-GF25 FR (RP) by performing size measurements, mechanical property tests, and micro-morphology comparisons. Some conclusions are presented here. Avrami M. Kinetics of phase change. II transformation-time relations for random distribution of nuclei. J Chem Phys. 1940;8(2):212–24. https://doi.org/10.1063/1.1750631. Surface fractography of the plate treated by the three routes: (a) and (d) route I (b), (e) route II, and (c) and (f) route III, in which (a)–(c) were obtained with a magnification of 500, and (d)–(f) were obtained with a magnification of 1,000 times. From the comparison and analysis of the three routes, it can be concluded that the re-dried plate treated by route II is preferred for ensuring the dimensional accuracies, mechanical properties, and the employment character of the medium voltage environment. 5 Conclusion Liu Y, Wang Q. Melamine cyanurate-microencapsulated red phosphorus flame retardant unreinforced and glass fiber reinforced polyamide 66. Polym Degrad Stabil. 2006;91(12):3103–9. https://doi.org/10.1016/j.polymdegradstab.2006.07.026.Structure-property relationships in glass-reinforced polyamide, part 3: effects of hydrolysis ageing on the dimensional stability and performance of short glass-fibers-reinforced polyamide 66. Polym Compos. 2007;28(3):344–54. 10.1002/pc.20312 Search in Google Scholar Cao HS, Zhao ZZ. Plastic forming process and mold design. Beijing: China machine press; 1993. p. 392–4. Performing measurements using a micrometer showed that the dimensional accuracies were improved after the three treatment routes; however, there exist some nonnegligible differences between the accuracies obtained with the three routes. 4.1.1 Dimensional accuracy of the central hole

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