Elasticity

Elastomers are the predominant base materials for sealing elements. They are dimensionally stable, but at the same time highly elastically deformable. 

Rubber-elastic behavior essentially means that the sealing element can deform flexibly when external forces, especially pressure, are applied. After being relieved of this external force, an elastic workpiece returns to its original shape.

This elasticity is crucial for sealing applications, as it enables the sealing elements to reliably close the sealing gap, which varies due to tolerances and thermal influences. The components obtain their elastic resilience during vulcanization, which produces the necessary molecular cross-linking.

#1 Definition of elasticity

Elasticity is the property of a material to return to its original shape after an externally induced change in shape.

#2 Importance of elasticity

The elastic compression of sealing elements is used to close production-related unevenness in sealing surfaces. Compression and elasticity also serve to compensate for tolerances when positioning the sealing surfaces in relation to each other. 

This allows the sealing element to deform in order to close a sealing gap that varies around the circumference.

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