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Essentium HTN-CF25

Ref.: ESS-HTN-CF25-BLACK-175-750

175.00 €

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Approximate delivery date: Monday 25 November

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Essentium is an American manufacturer of industrial printers and technical filament. With presence in the USA, Asia and Europe, and their innovative spirit, they are revolutionizing the 3D printing world and leading the way to Industry 4.0. Essentium’s work has made it possible for many companies to prototype and manufacture on a large scale in-house, with quality but in a quick and affordable fashion. Essentium’s catalog contains numerous hightech filaments, mostly polymers and blends optimized for exceptional strength, flexibility and high mechanical performance in the most challenging industrial settings. The Essentium filaments find countless applications across various disciplines, such as aerospace and defense, automotive, biomedical, contract manufacturing, consumer goods, and electronic manufacturing.

High performance filament

Essentium's HTN CF25 (High Temperature Nylon) filament, nicknamed "Black Aluminum" by the company, belongs to the Essentium’s ample material portfolio, to the high temperature nylon (PA) family. This filament is composed of 75 % polyamide copolymer and the remaining 25 % is a carbon fiber core.

Parts printed with the Essentium HTN CF25

Image 1: Parts printed with the Essentium HTN CF25. Source: Essentium.

Polyamide copolymer, (aka nylon), is a synthetic polymer created by bonding alternating diamine and dicarboxylic acid monomers. Nylon was first used to make toothbrush bristles and women’s stockings right before WWII. During the war, nylon was mostly used in parachutes, ropes, body armor and helmet liners for the US army. Currently, nylon continues having numerous commercial applications, for example in fabrics and fibers, molding in the automotive industry, or in the manufacturing of electronics and food packaging. Nylon is also widely used in 3D printing (as powder in SLS and MJF, or as pellets and filament in FDM) due to its qualities of durability, flexibility, resistance to abrasion, friction, corrosion and chemicals. Nylon is a highly versatile thermoplastic that can be used as a base for specialistic filament blends with various technical properties.

One of such blends is the HTN CF25 filament. Filaments with advanced applications are often enriched with carbon fibres or glass fibres to make sure the specialistic filament is going to be up to the task. Adding carbon fibre (CF) makes the 3D prints more rigid, stiff, more dimensionally stable, and lighter (ideal substitute for metal parts). Those features make plastic reinforced with CF perfect for the automotive industry (high tensile strength and modulus, and high temperature tolerance) and the aerospace industry (weight reduced up to 50 % with preserved functionality).

Essentium’s multilayer technology used in their carbon enriched filaments

Image 2: Essentium’s multilayer technology used in their carbon enriched filaments. Source: Essentium.

High temperature filament with 25 % carbon fiber

Essentium’s HTN CF25 is a high-temperature semi-crystalline nylon with a core enriched with 25 % of carbon fibers. In comparison to standard nylon filaments, HTN CF25’s thermal and mechanical resistance are significantly improved. It deflects at a higher temperature than regular nylons, it is tougher and stronger, more resistant to abrasion, with boosted chemical and solvent resistance. The HTN CF25 is easy to print.

All those qualities make this filament an excellent choice for tools (injection molds, thermoforming, blow molding), high stiffness jigs and fixtures, high-strength end-use parts, or as a replacement for light-duty aluminum parts.

General information
Material	PA
Format	750 g / 2.5 kg
Density	1.32 g/cm³
Filament diameter	1.75 / 2.85 mm
Filament tolerance	- mm
Filament length	(Ø 1.75 mm - 0.75 Kg) ± 236.2 m / (Ø 2.85 mm - 0.75 Kg) ± 89.1 m

Printing properties
Printing temperature	270 - 290 ºC
Print bed temperature	60 - 80 ºC
Chamber temperature	-
Cooling fan	0 - 20 %
Recommended printing speed	40 - 80 mm/s
Recommended nozzle diameter	>0.25 mm mm

Mechanical properties
Izod impact strength	(ISO 180/A) XY 9.2 / 45/45 5.6 / YX 3.3 / ZX 1.4 KJ/m²
Elongation at break	(ISO 527-2) XY 1.4 / 45/45 2.0 / YX 1.9 / ZX 0.8 %
Tensile strength	(ISO 527-2) XY 148 / 45/45 74.5 / YX 40.6 / ZX 24.0 MPa
Tensile modulus	(ISO 527-2) XY 16000 / 45/45 6590 / YX 3500 / ZX 3510 MPa
Flexural strength	(ISO 178) XY 184 / 45/45 124 / YX 79.8 / ZX 40.3 MPa
Flexural modulus	(ISO 178) XY 11400 / 45/45 6320 / YX 3470 / ZX 2400 MPa
Surface hardness	-

Thermal properties
Melting temperature	225 ºC
Softening temperature	(ISO 75) 182 ºC

Specific properties
Transparency	-

Other
HS Code	3916.9
Spool diameter (outer)	- mm
Spool diameter (inner hole)	- mm
Spool width	- mm

Warping may occur when printing nylons, especially high-temperature nylons. It is caused by the temperature contrast between the extruded plastic and the ambient temperature. The Essentium HTN CF2’s warping risk is reduced due to the carbon fiber it contains. However, should warping occur, it can be reduced by keeping the ambient at around 45 ºC by using a heated bed or a printer with a heated chamber or enclosure. Warping can also be prevented by disabling fan cooling, using a skirt, a brim or a raft in the design or applying a bed adhesion spray designed to prevent warping.

Adhesion problems tend to occur when printing with nylon. The adhesion of the CF25 filament is significantly improved in comparison to standard nylon. Nevertheless, Essentium recommends using the Magigoo PA stick or PVA glue to ensure proper bed adhesion and prevent failed prints.

Nylon is a highly hygroscopic material. The HTN CF25 should be stored properly to prevent humidity from interacting with the filament. An ideal solution is a vacuum sealed packaging or a drying cabinet or case, such as the Fiber Three drying case, available in the version F3 Safe Light or F3 Safe Long Run. If HTN CF25 absorbs more than 400 ppm moisture, it should be dried in a low dew point oven or a vacuum oven for 6-8 hours. The exact instructions are given in the technical datasheet in the downloads section.

The manufacturer recommends printing this filament at 270-290 ºC and 40-80 mm/s (first layer speed of 15-30 mm/s), with the fan speed of 0-20 %. The optimal bed temperature for HTN CF25 is 60-80 ºC. More printing settings can be consulted in the technical datasheet in the downloads section.