Wacker Group will unveil three new silicone product lines for medical applications at the forthcoming Medical Design & Manufacturing (MD&M) Minneapolis.
The new liquid and solid silicone rubber grades Silpuran UR 7000 and UR 9020, as well as the room temperature-curing Silpuran UR34xx, belong to a new class of Silpuran UR products. It is especially targeted toward long term medical applications such as port catheters, voice prostheses, gastric rings, and pacemakers through to disk, joint and hearing implants. Due to the special requirements needed for such products, the new silicone rubber grades are grouped in the UR series, meaning “unrestricted” product class.
As introduced, Silpuran UR 7000 is a paste-like, addition-curing, liquid silicone rubber. Thanks to its short curing times, this two-part system is suitable for use in injection molding which, in turn, provides manufacturers with an economical option for mass producing parts such as connectors, valves and seals. The material is available in a variety of Shore A hardness grades and possesses considerable tear strength.
Meanwhile, Silpuran UR 9020 has been designed for medical products subject to high levels of mechanical stress. A readily pigmentable, addition-curing solid silicone rubber, this product can be used in injection or compression molding processes, and is suitable for medical and pharmaceutical molding applications. The material is available in Shore A hardness grades of 30, 50 and 70. In its final form, Silpuran UR 9020 achieves a tear strength of up to 50 N/mm (as defined in ASTM D 624 B).
As for the Silpuran UR 34xx, it is a low-viscosity, addition-curing silicone rubber suitable for use in medical applications requiring a soft compression effect. Two viscosity levels are available: 25000 mPas (Silpuran UR 3420) and 15000 mPas (Silpuran UR 3440). The product consists of an A and a B component, is easy to process and cures at room temperature. (MD&M) Minneapolis will be held from October 31 to November 1 in Minnesota, the US.