About SUNLU TPU Filament 1.75mm

SUNLU TPU Filament 1.75mm is a premium flexible 3D printing material that combines flexibility, durability, and elasticity in a single high-performance filament. Manufactured by SUNLU, a specialist in advanced 3D printing materials, this TPU filament is available in two Shore hardness options: 90A for high elasticity with antibacterial protection, and 95A for flexible toughness with superior impact resistance. Both variants offer excellent tear resistance and high elongation, allowing even complex designs to bend, stretch, and absorb shocks without breaking. The 90A variant delivers outstanding cushioning and support with 99.9% effective antibacterial and anti-mold protection, making it ideal for hygienic applications. The 95A variant, made from premium thermoplastic polyurethane, offers an ideal balance of flexibility and strength with excellent abrasion resistance for sports equipment and mechanical parts. With precise ±0.02mm diameter tolerance, SUNLU TPU guarantees smooth filament feeding and consistent print quality. Fully compatible with most FDM 3D printers including Bambu Lab, Creality, Prusa, and Anycubic, this filament is the professional choice for elastic parts, wearables, protective covers, gaskets, seals, and any application demanding durable flexibility.

Technical Specifications

Comparison: TPU 90A vs TPU 95A vs PLA vs ABS

Recommended Print Settings

• Nozzle temperature: 200-230°C (recommended: 215°C for optimal flow)
• Bed temperature: 40-60°C
• Print speed: 20-40mm/s (slower speeds improve flexible filament quality)
• Layer height: 0.1-0.3mm
• Cooling fan: 50-100%
• Retraction: 1.0-2.0mm at 20-30mm/s (minimal retraction recommended)
• Extruder type: Direct drive recommended (Bowden possible with careful tuning)
• Flow rate: 100-110%
• Infill: 15-25% for flexible parts, 30-50% for structural flexibility
• Wall thickness: 2-3 perimeters
• Top layers: 3-4
• Combing: Disable for cleaner prints
• Linear advance: Enable if available for consistent extrusion
• Bed adhesion: Glue stick or PEI sheet recommended

Frequently Asked Questions

What is SUNLU TPU filament?

SUNLU TPU Filament is a flexible, durable, and elastic 3D printing material made from thermoplastic polyurethane. Available in 90A and 95A Shore hardness options, it combines excellent tear resistance, high elongation, impact resistance, and wear-proof properties. It is perfect for creating elastic parts that can bend, stretch, and absorb shocks without breaking.

What is the difference between TPU 90A and TPU 95A?

TPU 90A offers the perfect balance of high elasticity and wear resistance with enhanced softness and rebound. It features 99.9% effective antibacterial and anti-mold protection for hygienic applications. TPU 95A is flexible yet tough, made from premium thermoplastic polyurethane with excellent impact and abrasion resistance, ideal for sports equipment and parts exposed to mechanical stress.

Is TPU filament difficult to print?

SUNLU TPU is designed for reliable printing performance with precise diameter control of ±0.02mm for smooth filament feeding. It is fully compatible with most FDM 3D printers including Bambu Lab, Creality, Prusa, and Anycubic. Recommended settings: nozzle 200-230°C, bed 40-60°C, speed 20-40mm/s. A direct drive extruder is recommended for optimal results.

What applications is TPU best suited for?

TPU is ideal for applications requiring flexibility and durability: phone cases, drone bumpers, gaskets, seals, shoe soles, watch bands, protective covers, automotive parts, sports equipment, wearables, flexible hinges, vibration dampeners, and any parts that need to bend, stretch, or absorb impact while maintaining shape.

Does SUNLU TPU cause clogging?

No. SUNLU TPU features precise ±0.02mm diameter tolerance ensuring smooth, consistent filament feeding and clog-free extrusion. The optimized formulation flows reliably through standard 1.75mm extruders when proper print settings are used.

What are the recommended print settings for TPU?

Nozzle temperature: 200-230°C. Bed temperature: 40-60°C. Print speed: 20-40mm/s (slower speeds improve quality). Layer height: 0.1-0.3mm. Retraction: 1.0-2.0mm at 20-30mm/s (minimal retraction recommended). Cooling fan: 50-100%. Direct drive extruder recommended. Disable combing and use linear advance for best results.

Is TPU 90A antibacterial?

Yes. SUNLU TPU 90A features 99.9% effective antibacterial and anti-mold protection. This makes it ideal for applications requiring enhanced hygiene such as wearable items, medical accessories, kitchen tools, and any parts that benefit from staying cleaner and fresher during long-term use.

What is the dimensional tolerance of SUNLU TPU?

SUNLU TPU filament has a diameter of 1.75mm with a precision tolerance of ±0.02mm. This tight tolerance ensures smooth, consistent feeding and reliable print quality, which is essential for achieving strong layer adhesion in flexible parts.

About SUNLU

SUNLU is a specialized brand in 3D printing materials and accessories, recognized for quality and innovation in filaments. With a professional production line and rigorous quality control, SUNLU offers a wide range of filaments including PLA, PLA+, PLA Matte, PLA Silk, PETG, ABS, ASA, TPU, and specialty materials. All products undergo manual inspection and compatibility testing to ensure the best results on FDM 3D printers in the market.