What is PPS filament
PPS filament
PPS filament is one of the most advanced and high-performance 3D printing materials, designed for demanding industrial applications. It belongs to the category of high-performance technical polymers and offers exceptional heat resistance, chemical resistance, and dimensional stability. When a printed part must withstand continuous heat, aggressive chemicals, or mechanical stress without deformation, PPS is one of the few materials that meets these requirements even in the long term.
PPS is based on Polyphenylene Sulfide (PPS) polymer, which is widely used in industries such as automotive, electronics, and chemicals. The molecular structure of the material makes it extremely stable at high temperatures and gives it excellent resistance to chemical degradation. PPS also does not absorb significant moisture, making it a reliable material in environments where temperature and humidity vary.
PPS properties and technical values
PPS is a technically high-performance material, and its properties differ significantly from more common 3D printing filaments. The table below shows typical values that can be used to assess the material's suitability for demanding applications.
PPS is particularly distinguished by its ability to retain its mechanical properties at high temperatures, where materials like PLA, PETG, and ABS would no longer perform reliably. This makes it a very attractive option for technical and industrial applications.
What is PPS filament used for in practice?
PPS filament is used in components exposed to continuous heat, chemicals, or mechanical stress. Typical applications include electronics housings, engine compartment parts, pump and valve components, and industrial fasteners and structural parts. The material's dimensional stability and chemical resistance enable its use in environments where many other plastics would degrade or lose their properties.
PPS is also suitable as a metal replacement in certain applications, especially when a lighter structure is desired without significant loss of performance. This makes it an interesting material for mechanical engineering and process industries, for example.
PPS printing and equipment requirements
Traditionally, PPS requires a high-temperature printing environment, but in practice, the material can also be printed in a chamber temperature of approximately 60 °C. This makes it printable on modern consumer-level 3D printers with an enclosed and heated chamber, such as Bambu Lab HD and QIDI Q2 devices. While these printers do not achieve industrial chamber temperatures, PPS printing is still possible with the correct settings.
Typical nozzle temperatures are 300–350 °C and print bed temperatures are 100–160 °C. However, a lower chamber temperature means that the material cools faster, and the polymer chain structure does not have time to organize optimally during printing. This directly affects the final mechanical properties of the part.
PPS annealing
PPS is a semi-crystalline polymer, and its final properties depend significantly on the crystallization process. When PPS cools rapidly during printing, especially at low chamber temperatures, the polymer chains remain partially disordered. In this case, the degree of crystallinity of the material remains low, which weakens mechanical strength, stiffness, and heat resistance.
Therefore, PPS prints should be post-processed by annealing. In annealing, the part is heated controllably to a temperature where the polymer chains gain more mobility and can arrange into a denser crystalline structure. This increases the degree of crystallinity and significantly improves the material's performance.
In practice, annealing is typically performed at temperatures of about 120–160 °C, and the treatment time varies from 30 minutes to even 2–3 hours depending on the size and thickness of the part. Thin parts reach equilibrium faster, while thicker parts require longer treatment. Controlled cooling is also important to prevent internal stresses or deformations in the part.
Without annealing, PPS prints typically do not reach the full potential of the material. Properly performed heat treatment can bring the properties of the part close to those of parts manufactured under industrial conditions, making this step critical, especially in demanding applications.
A good and affordable trick for hobbyists is to use an air fryer for PPS heat treatment.
Frequently Asked Questions about PPS Filament
What is PPS filament best suited for?
PPS is best suited for high-temperature and chemically demanding industrial applications.
Can PPS be printed with a consumer-grade 3D printer?
Yes, in some modern enclosed printers with a chamber temperature of about 60 °C, but optimal properties require annealing.
Why does PPS require annealing?
Because the crystalline structure of the material does not fully form during printing, especially at low chamber temperatures. Annealing allows the polymer chains to organize.
Is PPS chemical resistant?
Yes, PPS is highly chemical resistant and suitable for demanding environments.
Can PPS withstand continuous heat?
Yes, PPS retains its properties at temperatures even above 200 °C.
Is PPS difficult to print?
Yes, it requires high temperatures and a precisely controlled process, but it is also possible with advanced consumer-grade printers.
Summary
PPS filament is one of the most advanced 3D printing materials, offering exceptional heat resistance, chemical resistance, and mechanical performance. While the material has traditionally required industrial equipment, it can now also be used in modern consumer-grade printers with some compromises. However, the final performance is only achieved through annealing, which allows for optimal crystallization of the polymer chains. PPS is an excellent choice when maximum performance and reliability are required in demanding operating conditions.