Black - Spectrum S-Flex Carbon Filament - 1.75mm, 0.25kg

Spectrum S-Flex Carbon Black Filament 1.75mm – 250g

Spectrum S-Flex Carbon Black is an advanced flexible composite filament that combines the elasticity of TPU with the strength-enhancing benefits of carbon fiber reinforcement. Designed for demanding functional applications, this material offers excellent durability, reduced shrinkage, improved dimensional stability, and a professional matte surface finish while maintaining the flexibility required for impact-resistant and wear-resistant parts.

Engineered for makers, engineers, product designers, and industrial users, S-Flex Carbon is ideal for manufacturing components that require a balance of flexibility, toughness, and structural stability. The addition of carbon fibers improves print precision and reduces stringing compared to conventional flexible filaments, making it easier to achieve clean, consistent results.

The deep Black color provides a professional appearance suitable for prototypes, production parts, protective components, and technical applications.

Key Features & Benefits

• Flexible TPU-based composite filament
• Carbon fiber reinforced for improved rigidity
• Enhanced dimensional stability
• Reduced shrinkage and warping
• Improved print quality compared to standard flexible filaments
• Excellent abrasion resistance
• High impact resistance
• Strong layer adhesion
• Professional matte surface finish
• Reduced stringing during printing
• Excellent vibration damping properties
• Durable under repeated flexing
• Suitable for functional and end-use parts
• Ideal for industrial and engineering applications

Printability and Surface Finish

Spectrum S-Flex Carbon is formulated to provide improved printability compared to many traditional flexible materials. The carbon fiber reinforcement helps stabilize extrusion, reduce filament buckling, and improve dimensional consistency during printing.

The result is a filament that produces precise parts with a distinctive matte finish that naturally hides layer lines and gives components a professional appearance.

While flexible materials generally require slower print speeds than rigid filaments, S-Flex Carbon offers reliable feeding and consistent extrusion on many modern direct-drive and compatible Bowden-based systems.

Flexibility, Strength & Durability

S-Flex Carbon combines elasticity with enhanced mechanical performance, making it suitable for applications where flexibility and strength must coexist.

Performance benefits include:

• High flexibility and resilience
• Excellent impact resistance
• Improved stiffness versus standard TPU
• Strong resistance to abrasion and wear
• Long-term durability under repeated stress
• Good dimensional accuracy
• Reduced deformation during use
• Vibration and shock absorption
• Excellent layer bonding

This balance of flexibility and reinforcement makes S-Flex Carbon an excellent choice for demanding functional applications where conventional rigid plastics may crack or fail.

Typical Applications

Spectrum S-Flex Carbon Black is ideal for:

• Protective covers and housings
• Flexible mechanical components
• Vibration-damping elements
• Industrial seals and gaskets
• Wear-resistant components
• Automotive accessories
• Robotics applications
• Functional engineering prototypes
• Tool grips and ergonomic handles
• Shock-absorbing mounts
• Sporting equipment accessories
• Production-grade flexible parts

Material & Compatibility Information

Spectrum S-Flex Carbon is designed for FDM/FFF printers capable of printing flexible TPU materials.

Compatible printer platforms include:

• Bambu Lab X1 Series
• Bambu Lab H2D
• Prusa MK4S
• Prusa CORE One
• Creality K1 Series
• Creality K2 Plus
• QIDI printers
• Raise3D systems
• Ultimaker platforms
• Other TPU-capable FDM printers

Recommended printing considerations:

• Direct-drive extruders typically provide optimal results
• Dry filament before printing
• Use slower print speeds than PLA
• Hardened nozzle recommended due to carbon fiber content
• Moderate cooling improves surface quality
• Store in a dry environment when not in use

Because carbon fiber particles are abrasive, wear-resistant nozzles are recommended for extended use.

Why Users Choose Spectrum S-Flex Carbon

Spectrum S-Flex Carbon is chosen by engineers, designers, manufacturers, and advanced makers who need more than a standard flexible filament can offer. The combination of TPU flexibility and carbon fiber reinforcement delivers improved stiffness, enhanced print quality, and greater dimensional stability while retaining excellent impact resistance and durability.

Users appreciate its ability to create functional parts that withstand repeated mechanical stress, abrasion, and vibration without sacrificing performance. Its matte finish and engineering-grade appearance further make it an attractive option for professional prototypes and end-use products.

Create Durable Flexible Parts with Professional Performance

Whether you're producing protective components, flexible mechanical parts, industrial dampers, or wear-resistant prototypes, Spectrum S-Flex Carbon Black provides the strength, flexibility, and print consistency needed for demanding applications. Print functional components with confidence using a carbon fiber reinforced flexible filament engineered for real-world performance.

Download the Technical Data Sheet (PDF)