Rizium GF — Glass Fiber COC Filament

Rizium™ GF is the only fiber-filled Cyclic Olefin Copolymer (COC) blend filament on the market, reinforced with glass fiber and engineered for engineers who need results, not problems. It delivers fast, low-failure FFF printing with outstanding surface finish, dimensional stability, and near-isotropic strength — with no drying required.

Why Rizium GF

• Near-isotropic strength — strong in all directions, not just XY
• No drying required — <0.01% moisture absorption, always ready to print
• Outstanding surface finish with nearly invisible layer lines
• Chemical resistance to acids, alcohols, and ketones
• Cold-resistant — reliable in subzero and cryogenic environments
• Low VOC — UL GREENGUARD 2904 certified, safe to print indoors

Mechanical Properties

• Flexural Strength: 87 MPa (ISO 178)
• Flexural Modulus: 2.9 GPa (ISO 178)
• Tensile Strength: 57 MPa (ASTM D638)
• Tensile Modulus: 3.6 GPa (ASTM D638)
• Tensile Elongation: 1.9% (ASTM D638)
• IZOD Impact, Unnotched: 230 J/m (ASTM D256)
• IZOD Impact, Notched: 83 J/m
• Glass Transition: 75°C  |  HDT: 75°C  |  Flame: UL94-HB
• Specific Gravity: 1.06 g/cm³  |  Moisture Absorption: <0.01%

Print Settings

• Nozzle: 220–260°C, hardened steel / wear-resistant
• Bed: 90°C (PEI, textured, or G10)
• Print speed: up to 250 mm/s  |  Flow: up to 30 mm³/s
• Diameter: 1.75 mm ±0.02 mm

Note: Due to poor hydrocarbon (oil/gas) resistance it is not ideal for automotive applications, and not ideal for sustained high-temperature use above its 75°C HDT. Due to its low density, an 820g spool offers filament length similar to a 1kg PLA spool. Available in 500g and 820g.

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