Introduction to PC-PBT in 3D Printing
PC-PBT represents one of the most interesting solutions in the landscape of professional 3D printing materials. It is a polymer blend that combines the characteristics of Polycarbonate (PC) and Polybutylene Terephthalate (PBT), creating a hybrid material with exceptional properties for technical and industrial applications. The new formulation available in our catalog, in various colors including natural, white, gray, and black, has been specifically developed to guarantee superior performance in FDM/FFF type 3D printers.
The peculiarity of this material lies in its ability to combine rigidity and thermal resistance, while maintaining excellent dimensional stability during the printing process. This makes it particularly suitable for those seeking an advanced solution for projects requiring durability and precision.
Technical Characteristics of PC-PBT
The new formulation PC-PBT stands out for its mechanical and thermal properties. With a tensile modulus of 2600 MPa and a tensile strength of 60 MPa, this material offers superior performance compared to many other polymers. The elongation at break of 3.6% indicates good resistance to deformation, while the notched impact strength of 5.0 kJ/m² at 23°C demonstrates its ability to absorb energy without fracturing.
From a thermal perspective, it has a Vicat softening point of 130°C and an HDT of 107°C at 0.45 MPa, values that make it suitable for environments with significant thermal variations. These characteristics place it in an intermediate position between materials like ABS and Nylon, offering an optimal compromise between printability and final performance.
Advantages of the New Formulation
The updated version introduces several improvements. One of the main strengths is the ability to be printed on open machines, without the need for a heated chamber. This is a major advantage for those with desktop or semi-professional printers.
Furthermore, the low warping and excellent interlayer adhesion guarantee consistent print quality, which is fundamental for series production and projects with tight dimensional tolerances.
Practical Applications of PC-PBT
Automotive Sector
Used for internal components such as brackets, guides, and enclosures. Its resistance to high temperatures makes it suitable for parts near the engine, while its impact resistance allows for use in areas subject to vibrations or impacts.
Electronics and Devices
Perfect for housings, connectors, and structural parts. Dimensional stability ensures that components maintain their shape even under stress, while rigidity provides protection for circuits and components.
Industrial Prototyping
Enables the production of tools, guides, and components resistant to wear, combining mechanical strength and slight flexibility.
Recommended Printing Parameters
– Printing temperature: 250–260°C
– Print bed: Heated to promote first layer adhesion
– Nozzle: Brass recommended
– Heated chamber: Not required
Drying: Essential to avoid defects. Dry at 90°C for several hours or at 100°C for at least 4 hours if the material has absorbed moisture.
Comparison with Other Materials
Compared to PLA, PC-PBT offers much higher thermal and mechanical resistance. Compared to ABS, it exhibits less warping and better dimensional stability. It is also less sensitive to moisture than Nylon.
It therefore positions itself as a balanced choice between performance, printability, and cost, without reaching the extreme performance of pure polycarbonate.
Tips for Optimal Printing
– Improve bed adhesion with adhesives or treated surfaces
– Maintain a moderate print speed to ensure surface quality
– Store the material in airtight containers with desiccants to prevent moisture absorption
Post-Processing and Finishing
PC-PBT is suitable for sanding with fine-grit sandpaper and painting with specific primers. Dimensional stability ensures that finishing processes do not compromise the part’s geometry.
Conclusions
The new formulation PC-PBT represents a step forward in professional 3D printing materials. Its combination of mechanical performance, thermal resistance, and ease of printing makes it ideal for demanding applications without requiring specialized equipment.
Thanks to the possibility of using it on open printers, it is now accessible to a wider audience of makers and professionals. Whether for prototyping, industrial components, or electronics, PC-PBT represents a reliable choice for projects requiring durability and consistent performance.