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Study on Impact Properties of Polyamide 12 depending on Temperature by Selective Laser Sintering Process

선택적 레이저 소결 공정 적용 폴리아미드 12의 온도별 충격 특성에 관한 연구

  • Kim, Moosun (Urban Transit Research Team, Korea Railroad Research Institute)
  • 김무선 (한국철도기술연구원 도시철도연구팀)
  • Received : 2018.07.17
  • Accepted : 2018.10.05
  • Published : 2018.10.31

Abstract

Additive manufacturing process technology, known as the 3D printing process, is expanding its utilization from simple model realization to commercialized part production based on continuous material development. Recently, research and development have been actively carried out to fabricate lightweight and high-strength parts using polymers, such as polyamide (polyamide), which is a high-strength engineering plastic material. In this study, the Izod impact characteristics were analyzed for polyamide 12 (PA12) materials. For the specimen production, selective laser sintering process technology, which has excellent mechanical properties of finished products, was applied. In addition, PA12 and glass bead reinforced PA12 materials were produced. The specimens were classified according to the production direction on the production platform, and each specimen was subjected to an Izod test at test temperatures of $-25^{\circ}C$, $25^{\circ}C$, and $60^{\circ}C$. As a result, the impact strength of PA12 and glass bead-reinforced PA12 of vertical direction specimens were 48.8% and 16.3% lower than those of the parallel specimens at a $25^{\circ}C$ test temperature and the impact strength of parallel specimens was improved by 46.5% and 20.4% at a test temperature of $60^{\circ}C$ compared to that at $-25^{\circ}C$.

Keywords

Building orientation;Impact property;Polyamide 12;Selective laser sintering;Temperature

Acknowledgement

Supported by : 한국철도기술연구원

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