MATERIALS | MEDICAL TUBING
Right: Evonik has devised a way to create multi-layer medical catheters, which are commonly used in
angioplasty
promising alternative to PVC for intravenous (IV) tubing applications – thanks to increased concerns about plasticiser interactions with active pharma- ceutical ingredients and a growing focus on recyclability. Kristof Verschueren, senior marketing man-
ager at Kraton, said that HSBC has a specific gravity of around 0.9, is plasticiser-free, improves drug compatibility and reduces the risk of contamination. Additionally, it has a lower moisture vapour
transmission rate (MVTR) than PVC. Process stability is another key advantage, he
said. PVC begins to degrade at 130°C, while HSBC sees minimal degradation up to 250°C and produces minimal hazardous chemicals during thermal processing or combustion. In addition, its compatibility with polyolefins makes for easier recyclability, he said. Key features of HSBC medical tubing – such as
phthalate- and plasticiser-free formulations, good mechanical and optical properties and high flexibility – create benefits such as improved patient safety, compliance with sterilisation needs and kink resistance.
Multi-layer catheters Evonik has devised a method to create multi-layer medical catheters in a single manufacturing step. A major difficulty in creating these devices is to
join different materials together, which often involves the use of tie-layers and multiple produc- tion steps.
“Multi-layer catheters are common in angioplas- ty and require a combination of dissimilar poly-
saldi@jwell.cn
IMAGE: SHUTTERSTOCK
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