WEB EXCLUSIVE: Two new high-hardness grades have been added to the Medalist MD-200 Series of TPVs from Teknor Apex Co.
, Pawtucket, R.I., extending the already broad durometer range of these high-purity compounds for replacing rubber in medical applications.
Previously ranging in Shore A durometer from an ultra-soft 15 to semi-hard 80, the MD-200 Series now includes an 87 Shore A compound, MD-240, and a 43 Shore D grade, MD-245. The latter’s durometer is said to be roughly equivalent to a Shore A hardness of 93. Their rubber-like properties include low long-term compression set, high fatigue resistance, prolonged flex life, stability at high temperatures, abrasion resistance, and long-term sealability. Both compounds can be extruded, injection molded, and blow molded, and are recommended for applications such as peristaltic tubes, collection and drainage tubes, stoppers for vials, caps and plugs, seals and gaskets, device handles, ergonomic soft grips, valves, and diaphragms. The TPVs’ light natural color permits efficient use of colorants.