Engineering plastics have good mechanical properties,and are the most widely used 3D printing materials at present.As the most diverse and widely used engineering plastics,polyamide (PA) materials have the advantages of high crystallinity,low melt viscosity,good fluidity,easy processing and molding,and maintaining good mechanical properties after 3D printing.There are many types of PA materials.Through continuous improvement of modification methods,the excellent new PA materials such as nano-PA,halogen-free flame-retardant PA,conductive PA,and magnetic PA will be developed and used in 3D printing technology.The research progress of PA6,PA11,PA12,PA66 materials in 3D printing technology was reviewed,and prospected their development prospects in future.
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