Siraya Tech PPA-CF Core 1.75mm 1kg

The Siraya Tech PPA-CF Core filament represents the new frontier of engineering applications thanks to its innovative core-shell technology: a structure where the filament's core contains 25% carbon fiber, while the outer layer (shell) is composed of pure PPA (polyphthalamide). This architecture ensures unrivaled mechanical and thermal properties, maximum stiffness and strength with less nozzle wear, and excellent layer adhesion, making it perfect for technical components and parts subjected to high stress.

PPA-CF Core is ideal for manufacturing automotive and aerospace parts, industrial tools and fixtures, electronic enclosures, structural elements, and professional prototypes. It stands out for its high heat resistance (Vicat 238°C, HDT up to 199°C after annealing), low moisture absorption, and precise formability on latest-generation FDM printers with all-metal hotends. The action of the outer shell protects against abrasions, reducing printer maintenance even in intensive production.

Technical Specifications

• Filament Diameter: 1.75mm (1kg spool)
• Composition: PPA core with 25% carbon fiber + pure PPA shell
• Technology: core-shell, carbon concentration in the core/optimal layer adhesion
• Density: 1.23g/cm³
• Tensile Strength (XY): 121MPa (annealed)
• Young's Modulus (XY): 10,220MPa (annealed)
• Elongation at Break (XY): 1.6% (annealed)
• Flexural Strength (XY): 185MPa (annealed)
• Flexural Modulus (XY): 9,510MPa (annealed)
• Charpy Impact (XY): 7.3kJ/m²
• Vicat Temperature: 238°C
• Glass Transition: 80°C
• Melting Point: 239°C
• HDT: 126°C (1.8MPa, annealed), 199°C (0.45MPa, annealed)
• Recommended Print Temperature: 280–320°C
• Heated Bed Temperature: 80°C
• Recommended Print Speed: 30–120mm/s
• Recommended Nozzle: hardened steel 0.4–1.0mm
• Cooling Fans: OFF
• Retraction: 1–3mm, 1,800–3,600mm/min
• Annealing: 80–100°C for 4–8h (see annealed properties table)
• Storage: packaged in a low-permeability aluminum bag, print-ready; dry only if necessary
• Compatibility: FDM all-metal, ready profiles for Bambu Lab and professional printers

Usage Tips

• For maximum performance, turn on the enclosure and follow annealing guidelines.
• Adhere to the indicated parameters to prevent warping and achieve maximum strength.
• Ideal for those requiring lightweight, rigid, and highly stable components at high temperatures and mechanical stress.