Patent ID: 7162932

Claim:
A method for determining a radial modulus of elasticity of a paper web or a corresponding web-like material, which can be reeled or wound on a reel, in which method the connection between the force and deflection of a web material arranged in layers is measured, wherein the method comprises the steps of: reeling or winding the web material to form a reel in a reeling or winding position, the reel defining a reel axis and a radial direction toward the reel axis; transferring the reel from the reeling or winding position to a measurement position; and making measurements of force and deflection so as to allow calculating the radial modulus of elasticity of the reel of the web material in the measurement position outside the reeling or winding position; wherein the reel of web material is loaded with a force in the radial direction which is predetermined, and deflection of the reel in the radial direction that corresponds to the force is measured and registered; and wherein while the reel of web material is being loaded with the predetermined force, a curve is obtained of the deflection of the reel in the radial direction as a function of the force.