The first choice of material for demanding healthcare applications, as well as medical applications requiring structural stability and high flowability.
This product has all the regulatory compliance necessary for healthcare applications, furthermore has higher structural stability and very high fluidity.
The specific characteristics of ABV TPU are:
- Contain (GO- Ag), these components inhibit the growth of bacteria, viruses, algae, fungi, or mold. It´s a powerful antimicrobial.
- Contains pure graphene oxide with the optimal size and concentration to maintain the excellent mechanical properties of the polymer.
- Hydrophobic material that emphasizes impact resistance as well as abrasion resistance to lipids, cleaning, and disinfectant agents.
- The graphene blocks the contraction, deformation, and also blocks the lifting of the upper board layers. This gives the material a structure and a density that allows producing complex geometric structures.
- Also noteworthy is the increase in melting temperature, the wide range of temperatures it can withstand without degradation, and the increase in heat dissipation.
Covestro Deutschland AG is the manufacturer of the base polymer., which is added by graphene-based material and silver particles.
The main properties of ABV TPU (GO-Ag) are:
- 3D Printing Solution for custom orthosis: with a new, beautiful, ventilated design.
- Backing material to stable bone or other fractures, radiation oncology, prostheses, or foot inserts.
- Medical devices: connectors, catheters, flexible tubes, fluid, and air management
The use of a given application must be previously tested by the user, to determine its suitability.
Recommendations for use
- Processing temperature range: 196- 205º C.
The processing temperature is directly related to the printing speed. The faster the processing speed is, the higher the temperature of the print fuser should be.
- Recommended bed temperature: 50-70 ºC.
If the adherence to the building platform is weak, other products should be used to improve the adherence between the piece and the machine.
- Layer fan speed: 0%, not necessary.
- Heated chamber temperature: not necessary.
- It is advisable to use fully opened printers to ensure efficient cooling.
- Drying conditions: 65º C for at least 4 hours.
Due to the hydrophilic conditions of the thermoplastic polyurethane is recommended the complete material drying before its utilization.
- Printing speed: 20-40mm/s.
This parameter will depend on the final expected quality regarding the stability of the printing machine itself (if the speed is too high can cause bottlenecks, so this parameter has plenty of importance).
- Nozzle size: 0.4-0.6 mm, but smaller nozzles can be used if necessary.
Place the filament in the sealed bag with the desiccant that comes incorporated after each use.
General Description of Antimicrobial Action (ABV)
Graphene oxide is a material belonging to the family of graphene-based materials (GBM). Although in itself it has a weak bactericidal effect, in conjunction with silver particles, better results are obtained than for both materials separately. In this case, the GO film contains the particles attached to their functional groups. The high specific surface area of GO facilitates an attractive interaction to the bacterial membrane with a high degree of contact and allows the silver particles to release Ag+ ions on the bacteria in a localized manner. These ions generate ROS, which in turn destroy the respiratory system of the bacteria.
Steps of antimicrobial action: (A) Ag diffusion and uptake into the bacterial cell: Accumulation and dissolution of Ag particles at plasma membrane cause cell leakage. (B) Destabilization of Ribosomes: denatures ribosomes inhibiting protein synthesis and plasma membrane degradation. (C) Enzyme interaction: Ag bind with the thiol group (-SH) in the respiratory enzymes and deactivate them. (D) Interruption of electron transfer chain: AgNPs interfere with electron transport affecting the signaling pathway. (E) Reactive oxygen species (ROS): Mitochondrial damage induces ROS which oxidizes proteins. (F) DNA Damage. Ag binds with DNA preventing its replication and multiplication causing apoptosis. (G) Cell Death: The formation of pits and perforations in the cell membrane leads to the release of cell organelles and cell death.