3D printing with high-performance plastics – advantages and challenges

3D printing with high-performance plastics has established itself in recent years as a promising manufacturing technology in demanding industries. Particularly where mechanical, thermal or chemical resistance is required, high-performance plastics offer an interesting alternative to metals or standard plastics. However, alongside the advantages, the use of these materials also brings with it some challenges.

3D printing with high-performance plastics has established itself in recent years as a manufacturing technology for demanding industrial applications. This high-performance plastic printing enables the production of complex components from materials such as PEEK, PEI or PPS where high thermal, mechanical or chemical resilience is required.

What are high-performance plastics?

High-performance plastics are characterised by their special properties. They are highly temperature-resistant, chemical-resistant, mechanically resilient and often flame-retardant. Well-known representatives are PEEK (polyetheretherketone), PEI (polyetherimide), PPS (polyphenylene sulphide) or PVDF (polyvinylidene fluoride). These materials are preferably used in aviation, medical technology, the automotive industry or the energy sector.

Advantages of high-performance 3D printing with plastics

Additive manufacturing with high-performance plastics offers numerous advantages, above all compared with conventional processes:

1. Complex geometries: 3D printing allows the production of highly complex components without additional tooling effort. This is particularly advantageous for functional components with internal channels, cavities or integrated structures.

2. Individualisation: Small series or one-offs can be manufactured economically, which is particularly crucial in prototype construction and in medical technology.

3. Material properties: High-performance plastics retain their outstanding properties in the additive manufacturing process too. This makes it possible to realise components that withstand high temperatures, chemicals or mechanical stress.

4. Weight saving: Compared with metallic materials, high-performance plastics are significantly lighter – a decisive advantage, for example in aerospace.

Which high-performance plastics are suitable for 3D printing?

Various high-performance plastics are suitable for 3D printing when components have to withstand high thermal, mechanical or chemical loads. The frequently used materials include PEEK, PEI and PPS, among others.

PEEK offers high temperature resistance, very good mechanical properties and high chemical resistance. PEI is suitable for thermally loaded technical components and impresses with its dimensional stability. PPS is used above all where high chemical resistance and temperature resistance are required.

Which high-performance plastic is suitable depends on the later application, the 3D printing process used and the requirements placed on the component. Alongside material selection, controlled process management and a printing technique matched to the material therefore also play an important role.

Challenges in use in 3D printing

Despite the numerous advantages, 3D printing with high-performance plastics also brings challenges with it:

• High processing temperatures: Many of these plastics require extrusion temperatures of 300°C to 400°C or more. This places high demands on the printer hardware.
• Material costs: High-performance plastics are significantly more expensive than standard filaments. This has a particular impact on large-volume components.
• Shrinkage and warping: Due to the high processing temperatures, components can shrink or warp during cooling if the printing environment is not controlled.
• Post-processing requirements: Depending on the material and application area, extensive post-processing (e.g. annealing, smoothing, finish milling) is necessary.

Typical application areas

Industry	Examples of use
Aerospace	Lightweight structural components, insulation elements
Medical technology	Implants, patient-specific instruments
Automotive industry	Prototypes, functional components in the engine compartment
Electronics	Insulators, mounts, heat-resistant housings
Chemical industry	Pump components, seals, chemical-resistant parts

Prerequisites for successful 3D printing with high-performance plastics

In order to fully exploit the potential of the materials, the following points should be observed:

• A closed printing system with a heated build chamber is essential.
• A suitable build plate with good adhesion prevents warping.
• Drying the filaments before printing is necessary, as many high-performance plastics are moisture-sensitive.
• The choice of the right printing process (e.g. FFF, SLS or SLA) must suit the component and material.

Conclusion

3D printing with high-performance plastics offers enormous potential for applications where conventional materials or processes reach their limits. The combination of design freedom, individual solutions and excellent material properties makes them a key element of modern manufacturing. Anyone who masters the technical challenges can benefit sustainably from this technological advantage.