Teknor Apex Co. has developed three technologies to bond its Medalist thermoplastic elastomers to traditional connectors.
The new systems make the Medalist MD-500 series a practical alternative to PVC in medical tubing, according to Ellott Pritikin, senior medical market manager. They allow common-size TPE infusion tubing to achieve bonds with a retention force greater than the minimum required by device manufacturers, the Pawtucket, R.I., company says.
The room-temperature cured adhesive is designed for slow setting to allow precise control of assembly. The light-cured adhesive has a higher retention force than for any other commercially available light-cured adhesive, the company claims. The solvent bonding system uses commonly available solvents and can eliminate the need for multilayer extrusion.
Compared with PVC, the Medalist compounds show comparable crystal clarity and mechanical properties, have a similar feel, have similar clamp resilience, resist kinking and necking and are more flexible and less dense. As well, they undergo little color shift on heat aging after exposure to gamma irradiation sterilization.
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