Polymaker Introduces PPS-GF20 Filament, a Cost-Effective Alternative to PEEK and PEI

By on July 25th, 2025 in materials, news

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Polymaker’s Luke Taylor introducing PPS-GF20 material [Source: Polymaker]

Polymaker has released a new material that could shake up manufacturing.

The new material is part of their Fiberon line of production materials. Their initial selection included strong fiber-reinforced materials that are ideal for many end-use applications.

Now they’ve added a new material to the Fiberon portfolio, PPS-GF20. This is a PPS-based material, which you may not be familiar with.

PPS (Polyphenylene sulfide) is an organic polymer that can be used as a high-performance thermoplastic. It has two prominent features: very high thermal resistance and extreme chemical resistance. In fact, Wikipedia says:

“PPS has not been found to dissolve in any solvent at temperatures below approximately 200 °C (392 °F).”

It is also resistant to UV light, making it ideal for outdoor applications, flame-resistant, resists dyeing, and ages very slowly.

Polymaker has created a new 3D printer filament with PPS, PPS-GF20. The “GF20” refers to reinforcing glass fibers, to the amount of 20 percent of the total weight. That’s a significant amount of fiber.

The glass fibers introduce significant stiffness to printed parts, making them ideal for a number of production applications.

Polymaker states PPS-GF20 has a heat deflection temperature of over 230°C, and a bending modulus of over 4 GPa.

One more very interesting characteristic is the electrical properties. Competing strong materials tend to make use of carbon fibers, which are conductive. Here, PPS-GF20 uses glass fibers, which do not conduct electricity. This makes PPS-GF20 ideal for applications where radio transmissions must pass through the part. A key example of this would be for drones: a drone housing made from PPS-GF20 would have more communication range than one made from a CF material.

All of these make PPS-GF20 an incredible material. So how does it stack up against other ultra-strong super materials? Polymaker prepared this chart showing thermal resistance:

Thermal resistance comparison of PPS-GF20 [Source: Polymaker]

Note that PPS-GF20 is not too far behind PEI and PEEK, which are the current champions in that aspect.

But then there’s this:

Price comparison of PPS-GF20 [Source: Polymaker]

The chart shows a vast price difference between PEEK/PEI and PPS-GF20, per kg. This suggests that applications that don’t quite require the highest thermal resistance would be far better off using the less expensive PPS-GF20.

It seems that PPS-GF20 could be a material that unlocks applications that otherwise would be too expensive to produce using the traditional high-temperature materials.

Via Polymaker

By Kerry Stevenson

Kerry Stevenson, aka "General Fabb" has written over 8,000 stories on 3D printing at Fabbaloo since he launched the venture in 2007, with an intention to promote and grow the incredible technology of 3D printing across the world. So far, it seems to be working!