Dow Corning has launched a new silicone technology for the company’s high consistency rubber (HCR) product line. Well suited for medical tubing and other extruded applications—including short-term implants—the one-part QP1 HCR bases are supplied uncatalyzed to offer medical device OEMs and fabricators processing flexibility, enabling them to choose the most suitable formulation for each application. The materials provide high strength and can be platinum catalyzed using Dow Corning masterbatches. Alternatively, the products can be cured using a peroxide initiated system.
The QP1 Silicone Elastomers are FDA food contact–compliant by formulation and are USP Class VI tested. The materials are available in four durometers for a range of hardnesses.
Customers choosing to work with platinum catalyzed HCRs can select the company’s platinum masterbatches including QP1-47 Cross Linker, QP1-48 Cure Controller, and QP1-51 Catalyst. These four-component platinum systems offer fabricators fine-grained control over multiple factors: cure curve, hardness, elongation, and tensile strength. Peroxide initiated systems provide a cured product with good strength. Typically, a two-roll mill is used for blending.
The new QP1 HCR bases, supplied in Shore A hardnesses of 30, 50, 60, and 70, are formulated without the use of solvents, phthalates, or latex additives. They meet FDA 21 CFR 177.2600 requirements for food contact components and devices.
Applications for the QP1 HCR grades include short-term (29 days or fewer) implants, such as surgical incision drains and catheters, as well as non-implant devices such as fluid-handling tubing.