FusCoating™ NexPA-CF25 is an outstanding candidate for printing parts that need to have thin walls and high mechanical property requirements. It is one type of 3D printing filament with 25% carbon fiber content and a skin-core structure. The outer ‘skin’ of the filament is a modified resin with high layer adhesion strength, and the inner core is reinforced resin containing high chopped fiber content. FusCoating™ 3D printing filaments take advantage of the general laminar flow of polymeric fluids during extrusion and maintain the stable skin-core structure even after the filament passes through the nozzle of the printer. This technology contributes to the excellent Z-axis interlayer adhesion of FDM fiber-reinforced filaments because the major layer adhesion comes from the outer shell rein without fibers. Meanwhile, 25% chopped cabron fiber content can improve the mechanical properties and heat resistance of the printed parts.
Product highlights
Co-extrusion ‘skin-core’ structure
FusRock® invented a new generation of industrial 3D printing filament with a skin-core structurer by using multi-layer co-extrusion technology. The outer ‘skin’ of the filament is a modified resin with high layer adhesion, and the inner core is reinforced resin containing high chopped fiber content. The co-extrusion skin-core technology has greatly increased fiber content while maintaining the toughness of the filament and thus improved the mechanical properties and heat resistance of the printed parts.
Excellent layer adhesion
FusCoating™ 3D printing filaments have taken advantage of the general laminar flow of polymeric fluids during the extrusion and maintain the stable skin-core structure even after the filament passes through the nozzle of the printer. Among many other fiber-reinforced filaments, Z-axis layer adhesion loss is always a common issue during printing. However, for FusCoating™ 3D printing filaments, the Z-axis interlayer adhesion comes from the adhesion between the resin of the outer shell and this can completely avoid the layer adhesion loss. In addition, after being extruded through the nozzle, the inner core and outer layers of the extruded filament are heated, melted and bonded together again. In this way, the adhesion between the inner and outer layers can reach the optimal level and the fibers of the inner core can effectively withstand the force from the z-axis outer layer resin. With these two advantages, the Z-axis interlayer adhesion of final parts printed with FusCoating™ is further improved compared to parts printed with pure resin filaments.
Reducing nozzle abrasive wear
During the extrusion process, the FusCoating™ can greatly reduce the wear of the nozzle. The material that contacts the inner wall of the nozzle is made of pure resin which greatly limits the contact between the reinforcing fibers and the nozzle. At the same time, the skin-core structured filament can also avoid the contact between the reinforcing fibers of the filament and extruders or throats, which prolongs the service life of the entire extrusion parts of the 3D printer.
Product introduction
FusCoating™ NexPA-CF25 is an outstanding candidate for printing parts that need to have thin walls and high mechanical property requirements. It is one type of 3D printing filament with 25% carbon fiber content and a skin-core structure. The outer ‘skin’ of the filament is a modified resin with high layer adhesion strength, and the inner core is reinforced resin containing high chopped fiber content. FusCoating™ 3D printing filaments take advantage of the general laminar flow of polymeric fluids during extrusion and maintain the stable skin-core structure even after the filament passes through the nozzle of the printer. This technology contributes to the excellent Z-axis interlayer adhesion of FDM fiber-reinforced filaments because the major layer adhesion comes from the outer shell rein without fibers. Meanwhile, 25% chopped cabron fiber content can improve the mechanical properties and heat resistance of the printed parts.
Product details
| Parameter | Value / range |
|---|---|
| Color | Black |
| Filament Ø | 1.75 mm |
| Net weight | 2.5 / 3 kg |
Material properties
Physical properties
| Property | Test method | Typical value |
|---|---|---|
| Density | ISO 1183 | 1.23 g/cm³ |
| Water absorption | ISO 62: Method 1 | 1.09 % |
| Melting temperature | ISO 11357 | 237 °C |
| Melt index | - | 300 g/10min |
Thermal properties
| Property | Test method | Unit | Unannealed | Annealed | After annealing, saturated moisture treatment |
|---|---|---|---|---|---|
| HDT A | ISO 75: Method A (1.80 MPa) | °C | 83 | 124.2 | 100.7 |
| HDT B | ISO 75: Method B (0.45 MPa) | °C | 96.1 | 196.9 | 190.2 |
Mechanical properties
| Property | Test method | Unit | Unannealed | Annealed | After annealing, saturated moisture treatment |
|---|---|---|---|---|---|
| Tensile Strength XY | ISO527 | MPa | 109.68 ± 1.84 | 118.19 ± 3.82 | 108.86 ± 2.61 |
| Tensile Modulus XY | ISO527 | MPa | 8996.26 ± 232.21 | 9989.47 ± 227.73 | 8812.70 ± 162.42 |
| Elongation at Break XY | ISO527 | % | 2.18 ± 0.14 | 1.62 ± 0.12 | 2.43 ± 0.15 |
| Flexural Strength XY | ISO178 | MPa | 176.24 ± 3.51 | 184.19 ± 5.73 | 168.22 ± 3.40 |
| Flexural Modulus XY | ISO178 | MPa | 8487.47 ± 246.46 | 9214.34 ± 249.80 | 7466.02 ± 233.33 |
| Notched Impact XY | ISO179 | kJ/m² | 12.04 ± 0.94 | 7.29 ± 0.76 | 11.56 ± 0.91 |
| Tensile Strength Z | ISO527 | MPa | 58.01 ± 2.05 | - | - |
| Tensile Modulus Z | ISO527 | MPa | 4213.72 ± 97.08 | - | - |
| Elongation at Break Z | ISO527 | % | 1.64 ± 0.10 | - | - |
Printed specimen parameters:Specimens printed under the following conditions: Nozzle temp 340℃, Bed temp 80℃, Print speed 45mm/s, Infill 100%, Infill angle ±45°
Annealing conditions:Post-processing: 100°C Annealing 8 hours
Recommended printing settings
| Parameter | Value / range |
|---|---|
| Nozzle material | Materials with hardness equal to or higher than hardened steel |
| Build surface | PEI or Coating with PVP glue |
| Bed temperature | 70 – 80 °C |
- 1. Nylon material is very easy to absorb moisture within the environment, and printing after absorbing moisture will result ozzing, extruding with bubbles and rough surface appearance, thus reducing print quality. It is recommended that put the filament into a dry box (humidity below 15%) immediately after opening the FusCoatingT™ NexPA-CF25 vacuum foil bag for printing. Please put the unused filament back into the original aluminum foil bag for sealed storage.
- 2. After the material is damp, there will be more printing ozzing, bubbles extruded and rough printing surface. Please dry the filament in an oven at 80-100℃ for 4-6h to restore the printing quality of FusCoating™ NexPA-CF25.
- 3. It is recommended to use hardened steel and above grade nozzles made by Phaetus, which can effectively improve the print quality. Besides, it is recommended that the thickness of the heating block is longer 12mm.
- 4. After the printing is completed, the FusCoating™ NexPA-CF25 printed part can be annealed to further improve the strength of print part. Annealing conditions: leave printing part in an oven at 80-100℃ for 4 to 8 hours and cool to room temperature naturally.
Extrusion pressure vs. print speed test
Test parameters
Test parameters:12mm length brass heat block, BMG extruder, Phaetus Hardened Steel Nozzle, Nozzle size 0.4mm, Layer Height 0.2mm.
Disclaimer
Fusrock® 3D printing filaments are suitable for general printing applications and have been tested under standard conditions. However, the performance and safety of printed products are influenced by multiple factors, including printing parameters, model design, operating environment, and intended use. By using Fusrock® materials, users acknowledge and agree to independently evaluate the suitability of printed items for their specific applications and assume all associated risks. Fusrock® shall not be held liable for any damages, injuries, or losses resulting from the practical use of products printed with its materials, including but not limited to structural failures, malfunctions, or safety hazards in operational environments. Thorough testing must be conducted before applying printed components to critical, functional, or commercial scenarios. Fusrock® products are not certified for medical, aerospace, or life-support systems, except for certifications explicitly stated by Fusrock® for specific materials.
