Siraya Tech PPA-CF Core 1,75mm 1 kg

The filament Siraya Tech PPA-CF Core It represents a new frontier in engineering applications thanks to its innovative core-shell technology: a structure in which the filament 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 reduced nozzle wear, and excellent adhesion between layers, making it ideal for technical components and parts subjected to high stress.

PPA-CF Core is ideal for the production of automotive and aerospace parts, industrial tools and fixtures, electronics 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 outer shell protects against abrasion, 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 adhesion between layers
• 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)
• Bending 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 printing 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)
• Conservation: Packaged in a low-permeability aluminum bag, ready to print; dry only if necessary.
• Compatibility: All-metal FDM profiles ready for Bambu Lab and professional printers

Directions for use

• For maximum performance power up enclosure and follow annealing guidelines .
• Respect the indicated parameters to avoid warping and obtain maximum resistance.
• Ideal for those who require lightweight, rigid and highly stable components at high temperatures and mechanical stress.