Rubber gaskets are an umbrella term for anything that is rubber and seals between two mating surfaces. The purpose of the gasket is to essentially not allow matter to leak or seep through the opening or joint. The matter could be a fluid, such as oil, or water. The matter could also be a gas, such as pressured steam, or normal air. Generally, the gasket is able to seal the external environment out by conforming to the imperfections in the two mating surfaces, which then causes the gasket to seal. Rubber gaskets can be made from many materials. The type of material is almost entirely determined by the application. Some questions that are typically asked when choosing a material are:
Will the mating surfaces and gasket be subject to:
- High Temperature?
- Low Temperature?
- RFI/EMI wavelengths?
- Electric Currents?
- Fluids, i.e oil, hydrocarbons, hydraulic fluid, brake fluid?
Of course, these are just a few sample thoughts, there are many, many more. Each material offers its own unique properties that may offer the solution necessary.
For example, fluorosilicone offers great resistance to fluids. This may be of use if an application requires resistance to a certain fluid. Fluorosilicone has its own plethora of different fluids it offers resistance to, and ones it doesn’t, so the details would still need to be hammered out. Other gasketing materials provide other properties that may be useful in other applications. When designing an application it is helpful to have a converting facility that can prototype, and then provide production runs for your applications solution.
NEDC provides many gasketing materials such as fluorosilicone, butyl, cork rubber, silicone and others. NEDC provides these gasketing materials by different means, including waterjet cutting, molding, die cutting, and laser cutting.