PPS Printing Guide – Temperatures, Requirements and Problems

Polyphenylene sulfide (or “PPS” for short) is a semi-crystalline engineering thermoplastic available in filament form, known for its high chemical and thermal resistance.

In addition to its performance in chemical and high-temperature environments, PPS also exhibits excellent characteristics where it comes to toughness, wear resistance, and mechanical strength. The full picture is covered in our guide to PPS material properties and applications.

Such high-performing engineering plastics often require high-end 3D printers in order to print successfully, but this is less true of PPS than of its neighbours. It can be printed on consumer-grade machines. Of course, the prerequisite for good prints on consumer machines is that the parts are small and you hit the correct process parameters.

Which is why we will dissect what PPS actually asks of a printer, where the process goes wrong, and when PPS is the right material to reach for in the first place.

Material Structure and Its Relevance to Printing

PPS is a semi-crystalline engineering thermoplastic, and features a backbone consisting of phenylene rings and sulfur atoms.

The phenylene rings in particular contribute to making the molecular backbone incredibly stiff, and resistant to heat. The rings themselves are linked by sulfur atoms, and these links allow some flexibility into the molecular structure, although PPS remains relatively difficult to process (print). 

In addition, because the aromatic–sulfur backbone is chemically stable, it makes the polymer more resilient to chemical degradation.

PPS Printing Temperatures

The table below shows required printing temperatures for a regular, unfilled PPS filament.

Description	Value
Printer nozzle temperature	300–320 °C (or higher, depending on grade)
Heated bed temperature	90–120 °C
Chamber temperature	Varies depending on the filament formulation and part geometry; 60 °C or higher may be recommended
Print speed	25–45 mm/s
Bed material	Smooth PEI plate or textured PEI plate
Bed adhesion	Glue stick
Pre-drying recommendations	100–140 °C for 8–12 hours

Printer Features

Printing PPS effectively requires the right hardware. Thankfully, the printer requirements are not too demanding, especially when compared to those required for similar engineering materials (consider PEEK printing for example).

Nozzle

In order to print PPS successfully, a printer capable of reaching nozzle temperatures in the region of roughly 300–320°C, and even higher for some variants. Some PPS filaments require 330–370°C or even higher, so the filament manufacturer’s recommendations should be followed.

These temperatures are within the capability of some consumer-grade printers, although many conventional consumer printers cannot reach the higher temperatures required by some PPS formulations. With that in mind, these temperatures are still hot enough to melt PTFE liners in the hot end, so a full metal hot end is preferred for printing PPS.

Unfilled PPS is not particularly abrasive, so a hardened steel nozzle is perfectly adequate. Glass-filled grades are a different matter, and a wear-resistant nozzle should be specified for those.

Printer Bed

A print bed temperature of 90–120 °C is needed. Being semi-crystalline, PPS contracts during cooling as the crystals pack together, and a heated bed reduces the internal stresses that build up in the part as a result. Managing the temperature of the first layers is also what keeps the part anchored, since warping away from the bed is the first symptom of that shrinkage.

For the bed surface itself, a textured or smooth PEI plate is the recommended option. PPS can bond poorly to conventional print bed surfaces, so if adhesion remains an issue after the bed is at the correct temperature, a glue stick or a dedicated high-temperature build plate adhesive will close the gap.

Chamber Temperature

In terms of a heated build chamber, the requirement depends on the specific PPS formulation, printer and part geometry. Some PPS filaments can be printed without active chamber heating, while other manufacturers recommend or require an elevated chamber temperature. It can, in some situations, be beneficial to use a printer with heated chamber when scaling up to print larger/thicker parts, or items requiring high dimensional accuracy. In such cases, even a moderately heated chamber (around 60°C) can yield better results.

Common Issues with PPS Printing

As will most filaments, issues can arise with the printing process if the process is not managed correctly. And while PPS is relatively easy to print compared to some high-grade engineering plastics, it comes with its own set of unique challenges.

Warping and Cooling Rate

Warping can still occur in PPS prints if the temperatures are not managed correctly, particularly in terms of bed and chamber temperature. As PPS is a semi-crystalline plastic, uneven cooling can result in residual stresses, geometric distortions, and even cracking or layer delamination. To avoid such issues, always follow the manufacturer’s guidelines for their specific filament formulation.

Print Speed

Print speed for PPS is typically listed at 25–45 mm/s, which is slow by commodity filament standards and deliberately so. A lower speed means a lower volumetric flow through the nozzle, so the material can be heated more thoroughly before it is deposited. Hotter deposited material means better interlayer diffusion, which means a stronger part.

This matters more for PPS than the numbers suggest, because FFF parts already show reduced strength in the Z direction compared to the isotropic properties achievable with powder-based processes. Printed PPS can also exhibit lower crystallinity than moulded PPS, which can be partly recovered through annealing or by specifying a reinforced grade.

Higher speeds are certainly achievable, but the conservative figure is what manufacturers suggest to ensure consistency.

Support Removal

Another issue with printing PPS is related to its material strength. Removing support material can be problematic because PPS can form strong bonds with support material and the high-temperature printing conditions restrict the range of compatible support materials.

To combat this, one should consider using dedicated high-temperature support materials, or even soluble support materials. Just ensure that they are compatible with PPS before making your support material selection.

Moisture

In terms of filament drying needs, PPS is not very hygroscopic largely due to its aromatic rings which are non-polar and are in fact hydrophobic. In short, there is relatively little attraction between the polymer and water molecules, meaning that PPS is significantly less hygroscopic than polymers such as Nylon or PEI.

Of course, being hygrophobic does not mean that the polymer is completely incapable of absorbing water. There are still some polar components within the polymer linkages, and surface moisture can still potentially cause issues.

Some manufacturers recommend that PPS should be dried for 8 – 12 hours at temperatures of 100 – 140°C, but this should be performed on a case-by-case basis, depending on the history of the particular filament in question.

PPS Applications

Sector	Why PPS?	Typical printed parts
Automotive	High heat resistance, chemical resistance and electrical insulation make PPS suitable for demanding automotive environments, particularly within the engine bay.	Intake manifolds, filter piping and other under-hood components.
Aerospace	High temperature and chemical resistance combined with relatively low density and inherent UL94 V-0 flame retardancy make PPS attractive for lightweight, demanding components.	Lightweight structural and fluid-handling components, including complex geometries that benefit from direct digital manufacturing.
Chemical and oil & gas	PPS is stable against almost all acids, bases, solvents and fuels below 200 °C, which is the single strongest reason to choose it.	Pump housings and impellers, valves, seals, drop balls and rod guides.
Robotics	PPS provides high temperature and chemical resistance together with good mechanical performance and dimensional stability.	Robot components and functional end-use parts requiring heat and chemical resistance in complex geometries.
Water & fluid handling	PPS offers excellent resistance to water, chemicals and elevated temperatures, with negligible moisture uptake.	Fluid-handling components, manifolds, piping components and other water-system parts.
Electrical	High dielectric strength of 17–18 kV/mm and a low dielectric constant of 3–4.6 hold up under heat and humidity.	Connectors and terminal blocks, sensor and transformer housings, coil bobbins.
Analytical equipment	PPS combines chemical resistance, thermal stability and good dimensional stability, useful for equipment exposed to aggressive chemicals or elevated temperatures.	Analytical-equipment components and housings with complex geometries.
Industrial tooling	PPS retains useful mechanical performance at elevated temperatures and is chemically resistant, making it suitable for tooling exposed to heat and aggressive processing environments.	Autoclave tooling and other high-temperature composite-processing tooling.

When to Choose PPS Over Other Plastics?

There is no single factor that would determine whether PPS is suitable for a specific application. It is the combination of particular material parameters that would determine when PPS is the most effective material choice.

The comparison is clearest against commodity filaments. ABS, PETG and PLA all have heat deflection temperatures in the sub-100 °C region. Unfilled PPS holds 129–180 °C at 0.45 MPa and operates continuously at 220 °C, rising to 240 °C for filled grades. It is also inherently flame retardant, passing UL94 V-0 with a limiting oxygen index of 44% and no added flame retardant at all.

One caveat belongs here rather than buried in a datasheet. Unfilled PPS falls to roughly 112 °C HDT at 1.8 MPa, because above its 85 °C Tg the amorphous fraction can no longer resist the higher bending stress. Glass-fibre reinforcement removes that weakness almost entirely which is why load-bearing PPS parts are nearly always filled.

So why opt for PPS over the other engineering-grade or high-performance plastics?

Against PEEK, the honest answer is price. PEEK runs to 260 °C continuous service and offers better strength and fatigue resistance. But PPS can be 2-3x cheaper. If the part can perform with the properties PPS offers, it’s the choice to make.

Comparing it with PEI, PPS wins on the continuous service temperature (220 °C vs PEI’s 170 °C) and noticeably better chemical resistance.

PPSU sits in a similar bracket. The trade is chemical and thermal performance for toughness. PPSU survives repeated steam sterilization and accidental drops that would crack an unfilled PPS part. Where PPS wins on chemical inertness and heat, PPSU wins on ductility, which is why PPSU dominates reusable medical tooling while PPS is more common in chemical handling.

In short, PPS is the go-to choice when chemical inertness at high temperatures is critical and the budget will not carry PEEK.

Where PPS Actually Fits

PPS asks for considerably less hardware than its high-performance neighbours. There is no mandatory 200+ °C chamber, and many consumer/prosumer printers are capable of printing simple-geometry PPS parts without issues if you hit the correct print settings.

With PPS, control over the cooling rate matters due to contraction from crystallization. Meaning uneven cooling is what kills the prints. On a small part, a heated bed can handle this. Once you’re looking to print larger or thicker geometries, or anything held to a tight dimensional tolerance, a heated chamber turns from optional to compulsory.

Meet the necessary conditions, and you can print one of the most chemically inert thermoplastics out there, stable against almost any acid, base, solvent and fuel as long as the temperatures remain in the preferred ranges. Also, we should not forget about UL94 V-0 flammability. All at a fraction of the cost of PEEK.