Phaetus
Phaetus aeCoating™ NexPA-CF25 Filament
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Phaetus aeCoating NexPA-CF25 — Co-Extrusion 25% Carbon Fiber PAHT Nylon
A high-temperature carbon-fiber nylon built for stiff, heat-resistant, dimensionally stable functional parts — engineering brackets, jigs and fixtures, RC/drone frames, automotive and tooling components. The base is a high-temp PAHT (PPA-class) nylon reinforced with 25% chopped carbon fiber.
What makes it different: co-extrusion skin-core
Unlike conventional single-extrusion CF nylon, NexPA-CF25 is built with a skin-core structure: the abrasive carbon fiber sits in the core under a pure-resin outer skin. Two practical results — better Z-axis interlayer adhesion (the bond comes from fiber-free resin at the layer boundary), and reduced nozzle wear because less fiber contacts the nozzle wall on the way out. It is still an abrasive filament, but it is engineered to be gentler on hardware than typical CF nylon.
Hardware you need
- Hardened nozzle is mandatory. Carbon fiber is abrasive — a brass nozzle will be destroyed. Use a hardened-steel nozzle at minimum; tungsten carbide is ideal for long runs. Phaetus specs a heater block of at least 12mm to hold temp at speed.
- All-metal hotend rated to 340°C. Print temp is 300-340°C.
- No enclosure required. This grade prints open-frame; a heated chamber is not needed (good ventilation is still recommended — CF nylon can release fumes).
Print settings (from Phaetus TDS)
- Nozzle / print temp: 300-340°C
- Bed: 70-80°C, PEI surface or a coat of PVP (glue stick)
- Nozzle diameter: 0.4-1.0mm
- Print speed: 30-90 mm/s
- Recommended support: S-PAHT quick-remove support
Drying — read this first
Nylon absorbs moisture fast. Load it into a dry box (below 15% RH) the moment you open the vacuum bag. If it has picked up moisture you'll see oozing, popping/bubbles, and rough surfaces — dry at 80-100°C for 4-6 hours to recover. For maximum strength, parts can be annealed at 80-100°C for 4-8 hours and cooled naturally.
Mechanical properties
- Tensile strength (X-Y): 103 MPa | Young's modulus: ~8790 MPa
- Bending strength: 170 MPa | Bending modulus: ~8570 MPa
- Heat deflection temp: 122.5°C @ 1.8 MPa (187.5°C @ 0.45 MPa)
- Density: 1.23 g/cm³ | Diameter: 1.75mm
Engineering filament — sold from clearance stock. Store sealed and dry; dry before printing for best results.
Shipping & Returns
Returns:
Thank you for purchasing from dfh.fm. I want you to be completely satisfied with your purchase. If for any reason you are not satisfied, you may return your purchase within 60 days of the original purchase date.
Defective items: Please inspect items upon receipt. If you receive a defective item, you may return it for a full refund or replacement within 90 days of the original purchase date. Please contact me to initiate a return for a defective item.
Non-defective items: If you are not satisfied with a non-defective item, you may return it for a refund within 30 days of the original purchase date. A 20% restocking fee will be deducted from the refund amount, to offset the time and inconvenience, as I am the sole employee processing the return and restocking the item. The fee also covers the costs associated with processing the return. Refunds for non-defective items will be issued through the original payment method.
Preordered items: Due to the nature of preorders, delivery dates are subject to change. Please keep in mind that, If you have preordered an item, it is not eligible for a refund until after it has arrived at the store. Once the item arrives at the store and is inspected, you may request a refund within 30 days of the original purchase date. Please note that refunds for preordered items may take up to 10 days to be issued.
To initiate a return, please open a ticket on the shop’s discord channel, with your order number and the reason for the return. We will provide you with further instructions on how to return your purchase.
Thank you for shopping with us. If you have any questions or concerns, please don't hesitate to contact me, via Discord.
Order alterations and cancellations:
Once an order has ben submitted, no alterations can be made. This includes adding or removing items or canceling orders. You are welcome to return an order, once you have taken receipt, following the returns procedure listed above.
Shipping:
US Shipping is via UPS or USPS. The way it is set up shows the least expensive options for standard, priority and express shipping. I can not take special requests for specific carriers at this time.
International shipping is mostly UPS, as I utilize Zonos/UPS integration to tally extremely accurate import and shipping costs.
I require a telephone and email with international orders and you must make yourself available to the carrier or your customs, should they require more information. If you are unreachable and the package is discarded or rerturned, I will not be responsible for rerturning your shipping cost.
If there is a problem with an international order, it is my choice to refund part or all of the order, or send a replacement.
Addresses are verified through Shopify, but the customer is still responsible for inputting their address in the correct format. Any returns or lost shipments, due to incorrectly addressed packages, are the responsibility of the customer.
