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Smartfill Flex 77A

Ref.: SM-FLEX-77A-TRUEB-175-750

30.54 €

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Quantity	Discount	Price
10	10% 10%	27.48 € 27.48 €
15	12% 12%	26.87 € 26.87 €

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Approximate delivery date: Wednesday 11 February - Monday 16 February

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The Smartfil Flex 77A from Smart Materials is a flexible filament for 3D printing designed for technical applications where extreme elasticity, mechanical strength, and durability are critical. This TPU 77A material is one of the most advanced options for professional flexible filament, industrial TPU filament, high-performance elastic filament, and flexible 3D printer material aimed at production and functional prototyping.

Thanks to its Shore 77A hardness, this flexible filament allows the creation of parts that can bend, compress, and stretch continuously without losing shape or breaking. Compared to stiffer hardness grades, Flex 77A offers superior flexibility while maintaining dimensional stability and consistent mechanical performance, making it a leading solution for high-quality flexible 3D printing.

Video: Smartfil Flex 77A flexible filament presentation

Advanced flexibility with true elastic recovery

The TPU Flex 77A filament stands out for its elastic memory, a key property where conventional materials fail due to fatigue or fracture. Unlike harder flexible filaments like 85A or 95A, this material allows greater deformation without compromising structural integrity, meeting searches for flexible filament that doesn't break and high-elasticity TPU for 3D printing.

This recovery ability makes Smartfil Flex 77A a strategic choice for parts under repeated stress, impact absorption, or continuous contact, offering long-term reliability and consistent performance in demanding environments.

Mechanical strength and durability for industrial use

Flex 77A from Smart Materials for 3D printing combines elasticity with high mechanical strength, enabling flexible components to withstand load, friction, and deformation without degradation. This balance places it above many standard flexible filaments, making it ideal for industrial flexible filament, durable 3D printing TPU, and technical flexible material.

Printed parts maintain mechanical performance even after prolonged use, reducing failures, maintenance, and replacements, increasing the functional and commercial value of the final product.

Part printed with Smarflex 77A filament in True Black color

Photo 1: Part printed with Smarflex 77A filament in True Black. Source: Smart Materials

Functional, technical applications and real usage comparison

The Smartfil Flex 77A flexible filament is ideal for manufacturing joints, soles, cushioning components, flexible protections, non-slip parts, and elements under constant deformation. Compared to stiffer filaments, 77A offers better adaptability to irregular surfaces and superior vibration absorption, directly meeting common needs in professional flexible 3D printing.

This material effectively meets searches for best flexible filament for 3D printing, allowing the development of real functional parts, not just visual prototypes, making it a reliable solution for technical and industrial environments.

Video 2: Different applications of Smartfil flexible filaments. Source: Smart Materials.

Layer adhesion and uncompromised print quality

One of the most critical factors of TPU Flex 77A from Smart Materials is its excellent layer adhesion, a main concern in flexible printing. This property reduces common problems like delamination or structural failure, reinforcing searches related to TPU printing issues and flexible filament with good adhesion.

The result is homogeneous, durable parts with a uniform surface finish, optimized for FDM 3D printers requiring consistency, precision, and professional quality.

Premium flexible filament optimized for conversion and performance

Smartfil Flex 77A from Smart Materials represents an advanced solution for those seeking to buy flexible filament for 3D printing with real performance, reliability, and repeatability guarantees. Its technical formulation meets current market needs for high-level flexible materials, combining extreme elasticity, mechanical strength, and ease of printing.

This professional TPU 77A filament is a strategic option for projects where flexibility is non-negotiable and final quality defines product success, positioning it as a solid reference in the high-performance flexible 3D printing ecosystem.

Video 1: Part printed with Smarflex 77A filament in Ivory White. Source: Smart Materials

Photo 2: Part printed with Smarflex 77A filament in Ivory White. Source: Smart Materials

General information
Material	TPU
Format	750 g
Density	(ASTM D792) 1.07 g/cm³
Filament diameter	1.75 mm
Filament length	291.4 m

Printing properties
Printing temperature	220 – 240 ºC
Print bed temperature	0 – 50
Cooling fan	60 – 80%
Recommended printing speed	15 – 20 mm/s

Mechanical properties
Charpy impact strength	(ISO 179) - KJ/m²
Elongation at break	(ISO 527) 775 %
Tensile strength	(ISO 527) 22 MPa
Tensile modulus	(ISO 527) - MPa
Flexural strength	(ISO 178) - MPa
Flexural modulus	(ISO 178) - MPa
Surface hardness	(ISO 7619-1 Shore A) 77

Other
HS Code	3916.9

The Smartfill 77A by Smart Materials is a highly elastic flexible filament that requires precise print settings to achieve optimal results. Proper parameter adjustment improves layer adhesion, prevents deformation, and ensures strong, functional flexible parts.

Recommended printing temperature

The ideal printing temperature ranges between 220 and 240 ºC, ensuring proper material fusion without compromising its elastic properties. Working within this range improves filament flow and enhances layer cohesion, especially in parts subjected to constant deformation.

Printing speed for flexible filament

To achieve stable and accurate extrusion, a printing speed between 15 and 20 mm/s is recommended. Low speeds are essential for flexible filaments like 77A, as they minimize material compression in the extrusion system and reduce the risk of jams.

Heated bed configuration

The Smartfill 77A can be printed with a bed temperature between 0 and 50 ºC, depending on the print surface used. A slightly heated bed generally improves first-layer adhesion without negatively affecting part geometry.

Use of enclosed chamber

This flexible filament does not require an enclosed chamber, as it exhibits stable thermal behavior during the printing process. This allows its use on open FDM 3D printers, provided direct drafts are avoided.

Controlled cooling for optimal finish

It is recommended to use the cooling fan in a range of 70 to 80 %, promoting gradual solidification of the material without compromising layer adhesion. Balanced cooling improves surface finish and mechanical strength.

Material flow adjustment

To compensate for filament elasticity, it is advisable to set the flow between 110 and 120 %. This adjustment ensures uniform extrusion, continuous walls, and consistent infill, especially in technical or functional parts.

The correct combination of these parameters allows full utilization of the performance of Smartfill 77A by Smart Materials, producing flexible, durable parts with a professional finish for technical and industrial applications.

Before using the product, it is recommended to consult the technical data sheet available in the Attachments tab.