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FIBREX PEI+GF30

Ref.: 3DXTECH-FIBREX-PEI-GF30-NATURAL-175-500

175.00 €

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Quantity	Discount	Price
10	10% 10%	157.50 € 157.50 €

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Approximate delivery date: Monday 9 March - Monday 16 March

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FIBREX PEI+GF30 from 3DXTECH is one of the top industrial 3D printing filaments for high-performance FDM/FFF applications. Made with authentic ULTEM™ PEI reinforced with 30% glass fiber, this engineering-grade PEI filament is ideal for functional parts, structural components, production tools, and high-temperature, high-load, chemically demanding applications where ABS, ASA, PETG, Nylon, or PC cannot deliver.

Extreme heat resistance: 3D filament for temperatures up to 217 °C

FIBREX PEI+GF30 by 3DXTECH offers a glass transition temperature (Tg) of 217 °C and HDT of 212 °C, enabling 3D prints to withstand continuous heat, hot chambers, ovens, industrial machinery, or prolonged thermal stress. This makes it a premium choice for high-temperature engineering plastics with minimal warping for industrial applications.

With low thermal creep, uniform expansion, and outstanding dimensional stability, it delivers repeatable tolerances and reliable results, essential for industrial additive manufacturing, series production, and precision parts.

Fibrex PEI+GF30 filament properties

Photo 1: Fibrex PEI+GF30 filament properties. Source: 3DXTECH

Superior stiffness and mechanical strength with 30% glass fiber

The FIBREX PEI+GF30 filament is reinforced with glass fiber, delivering 145 MPa tensile strength, 8790 MPa tensile modulus, and high flexural performance. These numbers place it among the strongest filaments for professional 3D printing.

It’s perfect for structural parts, housings, fasteners, jigs, tools, automotive and aerospace components, reducing weight and costs compared to metal solutions while keeping durability high.

Inherently flame-retardant, chemical-resistant, and sterilizable

FIBREX PEI+GF30 is naturally flame-resistant, with excellent chemical resistance to automotive fluids, alcohols, halogenated hydrocarbons, and aqueous solutions. This ensures long-lasting performance of printed parts.

Its long-term hydrolytic stability supports steam or autoclave sterilization, making it ideal for labs, medical devices, reusable technical parts, and scientific applications. Its stable dielectric properties also make it a top choice for electrical insulation and 3D-printed electronics.

3DXTECH certified quality with ISO-standard production

As a leader in high-performance technical filaments, 3DXTECH manufactures FIBREX PEI+GF30 under ISO 9001:2015 standards, ensuring precise diameter, consistent spool winding, and stable extrusion. This is critical for continuous professional 3D printing, repeatable production, and reliable industrial additive manufacturing.

FIBREX PEI+GF30: the ultimate ULTEM PEI filament for advanced engineering 3D printing

Perfect for searches like buy PEI filament online, original 3DXTECH ULTEM filament, high-temperature industrial 3D filament, best engineering 3D filament, or professional heat-resistant 3D printing material, FIBREX PEI+GF30 is the go-to solution.

With extreme thermal resistance, structural rigidity, dimensional stability, inherent flame retardancy, chemical durability, and 3DXTECH-certified quality, this glass-filled PEI filament is ideal for manufacturers, engineers, and companies demanding maximum performance, reliability, and failure-free industrial 3D printing.

3D-printed parts with Fibrex PEI+GF30 filament. Source: 3DXTECH

Photo 2: 3D-printed parts using Fibrex PEI+GF30 filament. Source: 3DXTECH

General information
Material	PEI
Format	500 g
Density	(ISO 1183) 1.51 g/cm³
Filament diameter	1.75

Mechanical properties
Elongation at break	(ISO 527) 2 %
Tensile strength	(ISO 527) 145 MPa
Tensile modulus	(ISO 527) 8790 MPa
Flexural strength	(ISO 178) 178 MPa
Flexural modulus	(ISO 178) 8560 MPa

Printing properties
Printing temperature	380-410 ºC
Print bed temperature	130-140 °C
Recommended nozzle diameter	0.4 mm

Thermal properties
Softening temperature	(ISO 75) 212 ºC

Specific properties
Flammability classification	UL 94 V-0 @ 0.25mm

Other
HS Code	3916.9

To achieve optimal results with this engineering filament, it is recommended to maintain the extruder temperature between 365 °C and 390 °C, with 370 °C to 390 °C being ideal to ensure proper material melting and maximum layer adhesion. The bed temperature should be set between 140 °C and 160 °C, contributing to dimensional stability during printing and preventing warping on large parts or complex geometries.

Using a heated print chamber is highly recommended, as it helps maintain a constant temperature around the model, reducing the risk of shrinkage and ensuring precise tolerances in functional components and final parts. For best precision, it is advised to use hardened steel nozzles with a minimum diameter of 0.4 mm, suitable for the abrasiveness of glass fiber reinforced filament.

Regarding print resolution, it is recommended to work with layer heights of 0.10 mm or higher, with 0.25 mm or more being optimal for a balance between surface detail and print speed. These specifications provide consistent finishes, superior mechanical strength, and dimensional stability, essential for industrial applications, tooling, and advanced engineering parts.

The filament should undergo a pre-print drying process to ensure optimal performance during extrusion. A 65 °C oven for 4 hours is recommended, or for more intensive drying, 120 °C for 4 hours. This process reduces absorbed moisture, preventing bubbles, stringing, and adhesion failures, ensuring final parts with maximum mechanical and thermal properties.

Following these recommendations optimizes industrial 3D printing of technical filament, achieving reliable, precise, and repeatable results suitable for high thermal, mechanical, and chemical demanding environments.