Liquid Silicone Rubber (LSR) is a high-purity, two-component platinum-cured elastomer that can be imbursed into a mold cavity to manufacture a part. It has been around since the late 70s and quickly became the choice material for manufacturing silicone parts and products.

LSR is commonly used in medical, life sciences, automotive, consumer, and industrial products and is favorably used because of its unique characteristics. Being highly biocompatible means, it can be used for parts that come into contact with humans. It’s also highly durable, compatible with high temperatures, and transparent. Its electrical properties make it ideal for a whole host of electrical applications as silicone can perform in much higher and lower temperatures than conventional insulating materials. It is also translucent, meaning the polymer can be pigmented to match any desired color.

Much like all elastomeric materials, there needs to be a polymerization reaction to create molecular chains. Vinyl and methyl siloxane are then polymerized to form polydimethylsiloxane chains. These chains provide strength and flexibility to the material. This process will change it from the liquid to the more viscous basic form of the LSR.

Whether it’s product design, tooling, prototyping, or parts production the silicone rubber molding manufacturer must have the capabilities to satisfy the most demanding specifications. Quality standards for LSR injection molding should include a robust quality system consisting of problem-solving tools and quality protocols that include, Advanced Quality Planning, Custom Validations and Qualifications, Control Plans, Customized Procedures, and A Wide Array of Metrology Capabilities.