Measuring tensile strength in mega Pascals (MPa) or pounds per square inch (psi) allows us to determine and measure the load or force per unit of the material cross section that would cause rupture. Measuring elongation establishes rubber strength and its ability to be stretched without breaking. Also measured in MPa elongation is typically expressed as a percentage of the original length of the piece being tested.
Rubber hardness is measured using a durometer. Hardness may be defined as a materials resistance to permanent indentation. This scale was first defined by Albert Shore who created the first durometer in the 1920’s. Shore durometers are the most common measuring device used today. Hardness is very important in relation to rubber stiffness and tensile strength when determining the right material for your project or product.
Rubber material is often used in sealing applications where compression or load is applied. Measuring a compression set test will determine the degree to which a specimen of material deforms or does not rebound to its original dimension. These sets are typically expressed in percentages and are particularly important for high pressures being applied over an extended period of use or service.
High Heat / Temp Performance
This measures the effect that heat has on the properties of a material or compound. Many rubber components regardless of shape or style may need to resist high heats depending on their application. This could be across many industries including food service and automotive.
Different elastomers or rubber compounds react differently when encountering fluid either as part of the designed usage, or as simple environmental interaction. Depending on your usage we can help to specify the right material for your desired end goals. The more common polymers are typically lower cost but sacrifice fluid resistance. Other options like Nitrile are less common but offer good resistance to fuel, oil and other fluids.
Low Heat / Temp Characteristics
Determining the brittle point with a compound will help to determine its effectiveness in low temperature environments. Typically, the material flexibility is the most affected by low temperatures but they can also result in a loss of resilience and then increased hardness before hitting the brittle point.