MEDICAL | COMPOUNDS
nance requirements and downtime for pumps. Testing shows that TPEs can be a cost-effective, high- performance alternative to silicone for tubing applications. “While silicone has been used traditionally, some applica- tions may not need all the properties provided by silicone,” said Laffey. TPEs also offer an alternative supply to mitigate supply chain continuity risks. Additional testing of the TPE grades is underway to evaluate the effects of sterilisation. Kraiburg’s latest is its Thermolast M series for medical
devices. These soft TPE compounds, available globally, have hardness values ranging from 30 to 50 Shore 00 and/or 45 to 70 VLRH, making them suitable for prostheses and orthotic devices. The company said that while TPEs in this hardness range tend to oil out and produce sticky surfaces, the new, extremely soft compounds have a dry and velvety feel. The elastic properties of the TPEs allow use in applica- tions with one-sided compressive loads, such as orthopedic damping elements. Kraiburg said that the compounds are easily processed in
standard injection moulding systems and may be used in 3D printing for customised products. The compounds have passed biocompatibility tests and are produced on a dedicated production line. The compounds comply with the ISCC PLUS requirements, which enables customers to use TPEs with a reduced product carbon footprint in strictly regulated markets, such as the medical sector.
New PPSU Syensqo, formerly part of Solvay Group, said that its Radel polyphenylsulphone (PPSU) for medical applications is known for durability under repeated sterilisation. A new application for the PPSU is in the removable shield for a new and unique sterile, reusable surgical task light designed by MezLight. The design required the materials to have mechanical robustness and the ability to withstand multiple steam sterilisations, as well as high temperature resistance for the heat from the LED
MIA G E:
MezLight’s world first sterile surgical task light has a removable shield made from Syensqo’s Radel PPSU material
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