3D Sphynx PBT-GF20 black 0,4 kg

3D Sphynx PBT-GF20: Nylon Performance Without Its Drawbacks

3D Sphynx PBT-GF20 is a premium technical filament designed for applications requiring extreme strength, high thermal resistance, and excellent dimensional stability. This material is based on polybutylene terephthalate (PBT) and is reinforced with 20% glass fibres, which gives it exceptional mechanical properties.

Thanks to its characteristics, 3D Sphynx PBT-GF20 is an excellent alternative to glass fibre reinforced nylon filaments (PA-GF). However, compared to them, it offers key advantages such as significantly lower water absorption, leading to easier material preparation before printing (less intensive and long drying is not necessary) and an overall more stable printing process.

Key Properties

• High strength and stiffness:

  • Tensile strength reaches up to 120 MPa and flexural modulus is 6200 MPa. These values make the filament suitable for producing highly stressed parts.

• Extreme thermal resistance:

  • The material retains its properties up to a temperature of 220 °C (according to HDT and Vicat), making it ideal for high-temperature applications.

• Low shrinkage and high dimensional stability:

  • A perfect choice for printing larger technical parts that require precise and stable dimensions without unwanted deformations.

• Chemical resistance:

  • It withstands contact with oils, lubricants, cleaning agents, and common industrial chemicals.

• Easier to print than nylon (PA-GF):

  • Thanks to less susceptibility to airborne moisture absorption, such lengthy and repeated drying as often required by nylon materials is not necessary. This facilitates storage and preparation for printing.

Important Guidelines for Successful Printing

• Printing in an enclosed chamber is a must: To achieve high-quality results and optimal mechanical properties of prints, an enclosed print chamber is required.
• Recommendation for maximum performance: To achieve the best results, especially regarding interlayer adhesion and elimination of internal stress in the material, we recommend actively heating the print chamber to a temperature above 60 °C.
• Material abrasiveness: Glass fibres make this filament abrasive. It is necessary to use a wear-resistant nozzle.

Recommended Print Settings and Technical Specifications

• Material: Polybutylene terephthalate (PBT) reinforced with 20% glass fibres
• Filament diameter: 1.75 mm ± 0.05 mm
• Spool weight: 400 g
• Nozzle temperature: 290–310 °C
• Bed temperature: 100–120 °C
• Print speed: Up to 90 mm/s (it is recommended to start with lower values and optimise)
• Cooling (part fan): 0–25 %
• Brim/Raft: Brim is recommended to improve bed adhesion.
• Nozzle: It is essential to use a wear-resistant nozzle (hardened steel, ruby, carbide-tipped).

Areas of Use

• Structural and functional parts requiring high strength and stiffness
• Covers, handles, and other mechanical components
• Industrial components and prototypes exposed to high thermal and chemical stress
• Alternative to PA-GF parts where lower moisture absorption is an advantage

Storage

Although PBT-GF20 filament is less prone to moisture absorption than nylon, we still recommend storing it in a dry place. For long-term storage, use a resealable container or box along with a desiccant (e.g., silica gel) to ensure optimal printing properties.

Order 3D Sphynx PBT-GF20 and get a professional material with performance comparable to glass fibre reinforced nylon – but without its typical drawbacks associated with high moisture absorption and demanding drying requirements.