TPU 95A Filament by Sunlu — Flexible 3D Printing Material, Black, MPN TPU 95A B

Sunlu TPU 95A is a flexible thermoplastic polyurethane filament in black, designed for FDM 3D printing. With a Shore hardness of 95A it balances elasticity and strength, providing high elongation at break, good tensile strength and resistance to abrasion. The filament has a precise diameter tolerance to ensure consistent feeding and print quality and is compatible with most printers that support TPU materials.

Advantages

The filament combines high elasticity with mechanical strength, allowing printed parts to absorb shocks and return to shape without permanent deformation. Its uniform structure and tight diameter tolerance reduce nozzle clogging and support steady extrusion. Optimized printing parameters and low moisture sensitivity when stored correctly make it suitable for reliable, repeatable results across prototypes and functional end-use parts.

Suitable for

• Flexible prototypes and functional parts (gaskets, seals)
• Wearable items and grips (cases, handles)
• Shock-absorbing components and vibration-damping mounts
• Mechanical parts subject to repeated bending or stress

When it may not be suitable

This material is not ideal for applications requiring rigid, high-stiffness parts or structural components that must bear high static loads without flexing. Very fine detailed prints or extremely high-temperature applications above the material’s heat deflection temperature may produce suboptimal results.

Key specifications

• Material: Thermoplastic polyurethane (TPU)
• Color: Black
• Hardness: 95A (Shore)
• Filament diameter: 1.75 mm (±0.02 mm)
• Spool weight: 1 kg
• Approximate filament length: 330 m
• Printing temperature: 190–210°C (50–80 mm/s) or 210–230°C (80–120 mm/s)
• Heated bed temperature: 50–60°C
• Print speed: 50–120 mm/s
• Density: 1.23 g/cm³
• Heat deflection temperature: 52°C
• Tensile strength: 34.4 MPa
• Flexural strength: 83 MPa
• Flexural modulus: 87.6 MPa
• Elongation at break: 1063%
• Storage humidity: below 20% RH (store in an airtight container with desiccant)
• Drying temperature: 50°C

How to use

Load the filament into a printer compatible with flexible materials, use a direct drive or optimized Bowden setup to ensure smooth feeding, and set the nozzle and bed temperatures according to the chosen print speed range. Adjust print speed and retraction settings to minimize stringing and ensure layer adhesion. Store unused filament in an airtight container with desiccant to prevent moisture uptake; if the filament absorbs humidity, dry it at 50°C before printing.

What to consider before purchase

• Verify your printer supports TPU and can handle flexible filaments (direct drive or tuned Bowden setup)
• Confirm nozzle diameter and extrusion system suitable for soft filaments
• Plan for a heated bed or suitable adhesion method at 50–60°C
• Consider drying and storage to keep filament below 20% RH

Usage recommendations

For best results, print at recommended temperature ranges with moderate speeds, use reduced retraction, and ensure consistent filament feeding. Use a brim or suitable bed adhesion aid for larger parts and dry the filament if moisture-related printing issues appear.