FibreTuff compounds are a novel solution for creating radiopacity in micro molding and extruded medical devices and implants. The traditional fillers used for radiopacity / radiopaque in polymers are barium sulfate, bismuth and tungsten. FibreTuff can replace these traditional fillers in nylons, polypropylenes and PEBAX. Furthermore, these traditional fillers are 4 times heavier and more costly. Plus, these traditional fillers will compromise part performance, or make the part brittle with less elongation and lower strengths.
Consider using FibreTuff when the following requirements are needed:
Cost Benefits using FibreTuff
• Sodick injection system is good for FiberTuff material evaluation per Kohei Shinohara.
• Sodick utilizes a proprietary two-stage V-LINE method for plasticizing and injection
• Both 14mm screw and 18mm screw were used to mold. The feeding is better on the
18mm screw but both small screw treat the raw material of FiberTuff biopolymers.
• The process was very stable and the parameters were consistent.
Tensile Str. @ Yield ISO 527 41 Mpa
Tens. Elong. @ Yield ISO 527 3.2%
Flexural Strength ISO 178 60 Mpa
Flexural Modulus ISO 178 2,540 Mpa
Izod Impact Strength ISO 180 kj/m2 3.69
Specific Gravity ISO 1183 1.0190
Gardner Impact D54 20 ft.lbs.
Heat Deflection ISO 75 85.70 C
Color Visual - Radiopaque
Flow Rate * D1238 gr / 10 minutes 5.7
Moisture D6980 0.07%
FibreTuff can be added as a master batch / salt and pepper mix to increase radiopacity of certain types of medical tubing - PEBAX, Nylon and Polypropylene. The traditional fillers used to increase radiopacity - barium sulfate, bismuth and tungsten is used at 40 to 50% loadings which sacrifice the elasticity of tubing and will increase brittleness.