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ASA Kevlar Spectrum

Ref.: SPEC-ASAKEVLAR-NATURAL-175-750

38.13 €

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The ASA Kevlar filament by Spectrum Filaments is a composite material based on ASA copolymer reinforced with 10 % of aramid fibres. This combination grants the resulting ASA Kevlar high resistance to weather conditions and chemical resistance typical of ASA and incredible strength and impact/damage resistance thanks to the aramid fibers.

Aramid fibres, also known as Kevlar, are used to manufacture highly damage-resistant items such as bulletproof vests, helmets and speaker membranes. Unlike glass or carbon fibers, aramid fibres do not fracture easily under stress. The addition of aramid fibers also helps reduce material shrinkage when printing, making it possible to produce large-scale models (heated chamber recommendeed to reduce warping). The ASA Kevlar filament is also characterized by perfect bonding between layers and produces parts with a beautiful and slightly rough matte surface finish (due to the aramid fibers).

Part 3D printed with the ASA Kevlar filament

Image 1: Part 3D printed with the ASA Kevlar filament. Source: Spectrum Filaments.

Another valuable feature of the ASA Kevlar filament is that it is not as abrasive as filaments reinforced with carbon or glass fibers, thus helping reduce the overall production costs. Nevertheless, an abrasion resistant nozzle should still be used with this filament in order to ensure proper and smooth extrusion and good surface quality of parts 3D printed with the ASA Kevlar filament.

Thanks to its excellent thermomechanical properties and resistance to weathering and chemicals, the ASA Kevlar filament is ideal for the 3D printing of parts with sunlight resistance and high impact strength, such as vehicle bumpers or other protective elements that are going to be used outdoors in harsh conditions. ASA Kevlar is also perfect for the manufacturing of functional prototypes, production tooling and jigs and fixtures.

General information
Material	ASA
Format	0.75 kg
Density	1.07 g/cm³
Filament diameter	1.75 mm
Filament tolerance	±0.03 mm
Filament length	±291.4 m

Printing properties
Printing temperature	240 - 270 ºC
Print bed temperature	80 - 100 ºC
Chamber temperature	Not necessary
Cooling fan	0 - 25 %
Recommended printing speed	30 - 70 mm/s

Mechanical properties
Charpy impact strength	(ISO 179-1) notched: 7.5 kJ/m² / unnotched: 25 KJ/m²
Elongation at break	(ISO 527) 6 %
Tensile strength	(ISO 527) 35 MPa
Tensile modulus	2200 MPa
Flexural strength	- MPa
Flexural modulus	(ISO 527) 2200 MPa
Surface hardness	-

Thermal properties
Softening temperature	(ISO 306) 94 ºC

Other
HS Code	3916.9
Spool diameter (outer)	200 mm
Spool diameter (inner hole)	52 mm
Spool width	52 mm

Once opened, ASA Kevlar filament must be stored properly to prevent it from absorbing moisture from the air. Filament is best stored in a hermetically sealed bag with desiccant, in a vacuum-sealed container or in a smart filament container.

The manufacturer recommends printing ASA Kevlar filament at 240-270 °C on a bed heated to 80-100 °C. It is recommended to print at a speed of 30-70 mm/s with the layer fan on. It is recommended to use a 3D printer with a closed chamber for larger prints. In case of adhesion problems, products such as Magigoo, DimaFix or 3DLac can be applied to the printing bed.

Since the ASA Kevlar filament contains aramid fibers, it is necessary to use an abrasion-resistant nozzle such as a hardened steel nozzle, a Vanadium nozzle, a tungsten carbide nozzle or a ruby tip nozzle, with a diameter of at least 0.4 mm.

It is strongly recommended to use standard safety equipment during printing and post-processing of 3D printed parts with ASA Kevlar filament: safety goggles, gloves, breathing apparatus and protective clothing as required.