Haiying Zhan

Conflicts of Interest The authors declare no conflicts of interest. Data Availability Statement All data needed to evaluate the conclusions in the paper are present in the paper. Additional data related to this paper may be requested from the relevant author. Supporting Information Filename Description pen70664-sup-0001-Supinfo.docxWord 2007 document , 7.2 MB Figure S1: Microscopic morphology images of BF/Talc/ETMP/PP composite foams with different Talc and EPDM contents.

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Abstract Polyformaldehyde (POM) and Polyamide 66 (PA66) are engineering plastics with excellent mechanical properties and thermal stability. Producing microcellular injection molded POM and PA66 parts with high dimensional accuracy would be beneficial to reduce material cost and product quality. In this research, foamed POM and PA66 gear parts were fabricated by using microcellular injection molding with supercritical nitrogen as the blowing agent.