With a brand new and expanded facility for Prusament development, we can now look for even more new ways to improve our materials: achieve better mechanical properties, deliver a beautiful surface finish, or lower health and ecological impact, and many more desired attributes. While exploring new processes, we often develop new materials with outstanding and unusual properties – like PETG Tungsten for radiation shielding, or PLA colored with processed organic waste.

And this is also the case for the materials we’re introducing today: they both have an uncommon composition. Say hello to Prusament PP Glass Fiber and Prusament Resin Impact65. The PP Glass Fiber is a lightweight material with excellent heat and chemical resistance, while the Impact65 is an affordable resin with low toxicity, great printability, and mechanical properties similar to standard thermoplastics. Let’s give both materials a proper introduction.

Prusament PP Glass Fiber

Polypropylene (PP) is a material you may already know – last autumn, we released Prusament PP Carbon Fiber Black, which has similar properties to its newer sibling. Both materials are lightweight, with exceptional heat and chemical resistance. Due to the filling with small particles, both materials have great dimensional stability (with little to no warping). On the other hand, they are highly abrasive, and a hardened nozzle is a must. The PP Glass Fiber has additional advantages: slightly higher mechanical resistance, plus it can be colored, as the base material’s color is translucent white – this gives us the possibility to add new product variants in the future. The material is easy to print and the surface has an attractive, rough matte finish. Note that the Prusament PP Glass Fiber is not ideal for printing tiny details and requires a hardened nozzle.

Best use

Due to its lightweight properties and extreme heat and chemical resistance, the Prusament PP Glass Fiber is suitable for demanding applications in the automotive and aerospace industries. It can serve its purpose in laboratories for custom equipment, such as vial racks. And finally, hobbyists may find this filament useful for printing drone parts and other components that require outstanding mechanical properties.

Pipette stands (Chemical-resistant components usable in a lab)	Vial stands (Heat and chemical-resistant components usable in a lab)
Exhaust manifold by pavol.n (Example of well-printed visual component)	Pill packer bottle by Squinn (Another example of a simple chemically resistant component)

Price, weight, and print settings

You can get the Prusament PP Glass Fiber Natural 850g for 69.99 USD / 74.99 EUR (VAT incl.). Or, you can get a bundle of the PP Glass Fiber with PP sheet for 99.99 USD / 99.99 EUR (VAT incl.).

• Recommended nozzle: Hardened 0.4 mm or wider
• Drying: Not necessary
• Nozzle temperature: 245°C
• Heatbed temperature: 100°C
• Recommended print surface: PP Sheet

Best with PP sheet

Here’s a great opportunity for a little reminder: we offer PP print sheets for most of our printers. These sheets are highly recommended for printing polypropylene-based materials as they provide perfect adhesion. Otherwise, with regular PEI sheets, you will face extremely low surface adhesion, which can be improved only by using additional accessories, like polypropylene tape. Preparing such a separation layer takes some time and requires some skill, plus the tape leaves glue on the print surface. With the PP print sheet, simply degrease the surface with IPA as usual, and you’re ready to go.

Fun fact: Our PP sheets are compatible with other common materials, not just polypropylene. You can try printing PLA, PETG, or TPU, for example… However, we do not recommend printing PLA on a brand-new sheet as the adhesion might be too low. First, print other materials, such as PETG, then you may proceed with PLA.

Chemical and heat resistance

Finally, we would like to share some additional information about the chemical resistance of this extraordinary material. We’re listing some of the most commonly used solvents and their interactions with the Prusament PP Glass Fiber (it’s not an exhaustive list, though):

List of some chemicals and their effect on the Prusament PP Carbon Fiber. Rating system: A = negligible effect, B = limited absorption or attack, C = extensive absorption and/or rapid permeation, D = extensive attack. The specimen dissolves or disintegrates.

About PP in general

PP (Polypropylene) in general is a material commonly used in packaging, valued for being a safe, resistant, and flexible material. Its main advantage is great resistance to a variety of chemicals. Pure polypropylene has very low dimensional stability. If you have ever printed with this material, you may have experienced very strong warping and a high failure rate. In Prusament PP Glass fiber and Prusament PP Carbon Fiber Black, these issues are addressed by adding fibers, thus making it a composite material.

Prusament Resin Impact65

And now for something completely different! We’d like to present to you our new Prusament resin: Prusament Resin Impact65. As the name implies, this resin comes with increased impact resistance while maintaining its easy printability and lowest possible toxicity. Let’s make a brief introduction to this new addition to our resin portfolio.

Prusament Resin Impact65 mechanical properties

This material comes with nice Izod impact strength 65 kJ/m2 (thus the name), tensile strength 25 MPa, and elongation reaching 30 %. Such values might be comparable to various common thermoplastics. It slightly resembles a very hard rubber, as the material’s thin parts bend instead of breaking.

Ok, but what does that mean in terms of practical use? Let us give you an example: when you print an action figure with a long spear using standard model resin, what would happen if you dropped it? Obviously, the spear would break. On the other hand, printing it with flexible resin might lead to the loss of detail and a more difficult printing experience. But when printed with Impact65, the action figure would show a great level of detail, and the mentioned spear would simply bend under pressure, just like most FFF materials would. How cool is that?

Prusament Resin Impact65 (left) and Prusament Resin Model (right). Model: Skeleton Spearman by MZ4250

One more useful thing is that when cured properly, the 3D printed part keeps its mechanical properties without any further change. This means that as a user, you simply print the resin (in SL1S SPEED, for example), wash it for 10 minutes and let it cure for 1 hour in CW1S. After that, the model properties will remain unchanged.

Furthermore, Impact65 can also be used for certain outdoor applications, which is also not very common among hobby SLA resins. If you don’t expose it to high temperatures, it should resist prolonged periods of UV exposure, moisture and low temperatures.

Lowest resin toxicity on the market

We say it on repeat, but there’s a good reason for it: Our resins are the least toxic in their category on the market. This is something that most companies don’t deal with and sell their customers resins with dangerous chemicals. Our resins do not contain chemicals like Bisphenol A, ACMO, TPO and others. Plus, we have everything tested and stated in our datasheets. If you care about your workplace safety, don’t forget to read about this issue in our older article.

Price, weight and print settings

You can get the Prusament Resin Impact65 1kg for 69 USD / 69 EUR (VAT incl.). Similar to other Prusament resins, this material was developed and tested on the Original Prusa SL1S SPEED, with which the resin prints flawlessly at 3.3s per layer (6s base layer, 0.05 mm layer height).

Pros and cons

Pros
	Tough, yet partially flexible
	High Impact resistance
	Low viscosity allows fast and reliable printing
	Easy post-processing with CW1S
	Suitable for outdoor applications (if not exposed to high temperatures)
	Odorless, without highly toxic substances (Bisphenol A, TPO, etc.)

Cons
	Poor high-temperature resistance
	Low notched-impact resistance (may tear under certain stress conditions)
	Very soft green body (similar to Prusament Resin Flex80)

Examples of use

Pipeline holder (Impact65 is suitable for various interlocking parts)	Cable holder (Simple durable and bendable part with locking mechanism)
Screwdriver bit holder (Impact65 offers high durability and wear resistance)	Skeleton Spearman by MZ4250 (Impact65 comes with easy printability and great detail)

Do you like our new Prusament materials? Let us know in the comments.

Happy printing!