Compression set test

The term is normally applied to soft materials such as elastomers. Compressive stresses can be applied in both an air and liquid environment and are also generally carried out at elevated temperatures in order to accelerate the effects. In some cases, tests are undertaken . This test is particularly useful for . Several test methods exist for quantifying the compression set of elastomers.

Both test methods use the same test apparatus, but different test specimens.

The optimum performance of your seal depends on many variables.

Elastic deformation (change of shape or size) lasts. Metho Name, Test Description, Calculation, Diagram. Compression Set and Compression Deflection Tests are two important factors.

The whole assembly is then held . This le initially, to the introduction of additilves for improving compression set resistance. Fixture for the determination of compression set , as indicated in. It is designed to accommodate . Why do we care about compression set ? Should not be confused with low temperature compression set. The compression set indicates the deformation component of the test material.

The test deformation is usually of the original height. There are two test methods covered in the standar viz. Longer polymer chains tend to give better “set resistance” because of the improved ability to store . Rubber products, such as hydraulic seals on aircraft, submarine hatch gaskets, and hydraulic brake cups, may be exposed to varying temperature extremes. ALL YOU HAVE TO KNOW ABOUT RUBBER COMPRESSION SET. A screw clamping device is convenient, but for low temperature tests , a fast unclamping device is required.

All adjustments of height and releasing the compression are made outside the freezer thus improving the accuracy of the test . IFD (previously ILD) is one test method to determine load bearing capacity ( firmness or stiffness), and is expressed in pounds force per in.