How do I choose the suitable material for my plastic 3D printed part?

Define Functional Requirements

Choosing the right material for a plastic 3D-printed part begins with understanding how the part will function. Requirements such as strength, heat resistance, flexibility, chemical exposure, and expected loading conditions determine whether you need basic thermoplastics like PLA or engineering-grade materials such as nylon (PA) and PEEK. Structural components typically require toughness and temperature stability, while cosmetic or prototype parts may prioritize surface finish and printability.

Select Based on Printing Technology

Different 3D printing processes support different materials. FDM works well with versatile thermoplastics, including ABS and PETG. SLA requires photopolymer resins and is ideal for fine-detail, high-precision models. SLS excels with durable nylon powders for functional prototypes and production parts. Matching the material to the printing technology ensures the part meets both functional and manufacturing requirements.

Consider Environmental and Chemical Exposure

If the part will face outdoor use, heat, or chemicals, material resistance becomes critical. For example, PC and high-performance plastics offer superior impact resistance and temperature capability, while TPU provides flexibility and abrasion resistance. SLA resins, while precise, may not be ideal for long-term UV or chemical exposure without post-curing or protective coatings.

Balance Cost and Performance

Budget also influences material selection. Standard resins or PLA offer economical options for prototypes, while advanced materials such as PEEK or nylon composites provide high performance at higher cost. Understanding your application’s reliability and lifetime requirements will help determine where material investment is justified.

Prototype, Test, and Optimize

When requirements are complex, building a small prototype in multiple materials can help determine the best choice. Neway Aerotech supports comprehensive material evaluation and, combined with material testing and analysis, ensures your final plastic 3D-printed part performs reliably under real-world conditions.