High consistency rubbers

NuSil’s portfolio of HCRs gives medical device manufacturers a silicone rubber material designed for a broad range of fabrication processes. Whether you are extruding tubing, compression or transfer molding parts or calendaring sheets for die cutting, our HCRs offer high mechanical properties and low modulus compared to other elastomer systems.

One of the most unique properties HCRs offer is “green strength”. Uncured HCRs have a clay-like consistency that can be shaped into a given dimension or form, and it will hold that shape until it is cured. In addition, due to its relatively low cost, HCRs provide an excellent material for low volume device or parts production, or as a material for prototyping.

NuSil offers a versatile portfolio of high consistency silicone rubber products with a range of cure systems to choose from:

• Platinum-catalyzed HCRs typically yield much higher physical properties than traditional peroxide-catalyzed HCRs; in addition, the curing process can be heat-accelerated for faster cure times and increased throughput.
• In peroxide-catalyzed systems, curing is initiated when the HCR is exposed to heat. This translates into a very long table life, or work time, which is beneficial for molding or extrusion operations.
• NuSil also offers uncatalyzed systems to provide the flexibility of using your preferred catalyst to achieve desired properties or cure chemistry.

HCRs can be formulated to create parts that range from continuous profiles to molded parts and can also easily incorporate additives for color, radiopacity or to create a foam from this material. Learn more