Fiberlogy FiberFlex 40D filament 1,75 mm 500 g

Fiberlogy FiberFlex 40D Black Filament – 1.75 mm, 500 g

Overview

Fiberlogy FiberFlex 40D Black is a flexible TPU (thermoplastic polyurethane) filament designed for producing durable, elastic, and impact-resistant 3D printed parts. With a Shore hardness of 40D, it offers a balanced combination of flexibility and ease of printing, making it more user-friendly than softer TPU materials while still delivering excellent rubber-like performance.

Material Properties

This filament is based on thermoplastic polyurethane (TPU), a material known for its high elasticity, abrasion resistance, and excellent fatigue durability. It can withstand repeated bending, stretching, and compression without permanent deformation. Additionally, it shows good resistance to oils, greases, and many common chemicals, making it suitable for functional and technical applications.

Key Features

• Flexible Shore hardness: 40D (balanced flexibility and printability)
• High resistance to abrasion and wear
• Excellent elasticity and impact absorption
• Good chemical resistance (oils, greases, mild chemicals)
• Reliable layer adhesion for flexible structures
• Professional matte black finish

Printing Recommendations

Printing flexible TPU requires optimized settings to ensure smooth extrusion and prevent feeding issues. A direct drive extruder is strongly recommended for best results.

• Nozzle temperature: 220–250°C
• Bed temperature: 40–60°C
• Print speed: 20–40 mm/s
• Retraction: minimal or disabled

Best Practices

To achieve high-quality prints, use slow and steady extrusion. Avoid excessive retraction, as TPU can compress and cause clogging in Bowden setups. A clean filament path and proper bed adhesion will significantly improve print reliability.

Applications

• Protective phone cases and covers
• Seals and gaskets
• Shock absorbers and vibration dampers
• Flexible hinges and joints
• Wearable components and straps

Summary

Fiberlogy FiberFlex 40D Black is a versatile flexible filament that combines durability, elasticity, and relatively easy printability. It is suitable for both hobbyist and professional applications where rubber-like behavior and mechanical resilience are required.