The concept of evaluating risk is common to quality systems; however, the approach to this can vary significantly depending on the industry served. Without a comprehensive understanding of all the risks in the supply chain, the resulting controls put in … Continue reading
Tag Archives: LSR
Open Nozzle System or Valve Gate?
Choosing the right injection technology for LSR molding is key to a successful part, especially in the case of directly gated components (no sprue). The two most popular systems involve open nozzle systems and valve gates. For larger parts (weighing … Continue reading
The Time-Temperature-Transformation Diagram
An informative presentation of the curing incorporating the degree of cure is the Time-Temperature-Transformation (TTT) diagram, developed by Enns and Gillham. It can be used to relate the material properties of thermosets, such as Liquid Silicone Rubber (LSR), as a … Continue reading
Why Only Hollow LSR Parts Float on Water
The density, or its reciprocal, the specific volume, is a commonly used property for polymeric materials. Density is primarily used as a material control tool as well as to compare the buoyancy of different materials, but it can also be … Continue reading
Liquid Silicone Rubber – Extensible, but Strong
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Liquid Silicone Rubber (LSR) is often utilized for seals, valves and diaphragms due to its high elongation (between 400 and 700% at room temperature) and tensile strength over a wide temperature range. The tensile properties of thermoset rubbers and thermoplastic … Continue reading