The Right Core for the Right Application

When applying winding tension to elastic material it elongates and, due to its memory effect, it tries to return to its original state, consequently creating radial pressure on the surface of the core. This means that the force is exerted uniformly around the circumference of the core surface.

The core reacts to the radial pressure by reducing its inside and outside diameter and simultaneously the core length increases. Traditionally, the method for measuring core strength has been Flat Crush. However, the deformations occurring in this test are different from those when radial pressure is applied, thus not simulating the right conditions when film or textiles are wound on the core. This is why our Radial Crush technology provides important advatages for the film & textile industry.