Silicone Rubber Liquid Rubbers for Medical and Healthcare Industries

Editor: Dominik Stephan

From Dow Corning come new liquid silicone rubber (LSR) grades that give medical device manufacturers and fabricators broader material choices for intricate devices and components. The QP1 family of eight translucent silicone elastomers has been developed for short-term and non-implant and insertion applications.

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Dow Corning has developed new silicone rubber grades for use in medical and healthcare applications
Dow Corning has developed new silicone rubber grades for use in medical and healthcare applications
(Picture: Dow Corning)

Dow Corning's QP1 LSR materials are two-part, platinum-catalyzed silicone elastomers supplied in a kit and suitable for liquid injection molding. They combine high tear strength for optimal durability in applications facing tough physical demands, such as membranes, with low compression set, which is of particular value for parts such as seals or valves that are subjected to compression during use, the manufacturer states.

Easy Handling and Cleaning Provided

The new materials are available in a wide range of durometers with excellent tear strength as well as other processing advantages that can reduce cycle times. The materials are also U.S. Food & Drug Administration (FDA) food contact compliant by formulation and are USP Class VI tested. Other processing advantages are batch-to-batch consistency and fast cure. When cured, they are thermally stable to 204C (400F) and are available in Shore A hardnesses ranging from 20 to 75.

Ready for Use in Food Grade Applications

The materials are formulated without the use of peroxides, peroxide by-products, chlorophenyls or PCBs. Nor do they use organic plasticizers, phthalates or latex additives. They meet FDA 21 CFR 177.2600 requirements for food contact applications.

Applications for QP1 LSR grades include short-term (29 days or fewer) implants such as wound drains and gastric feeding tubes, non-implant devices such as needle-less access valves, surgical devices such as anesthesia masks, and consumer products including nasal aspirators.

Dow Corning QP1 LSR is on display at the Dow Corning booth at MD&M West along with the company’s expanding portfolio of high-performance silicones solutions for the healthcare industry.