Intelligent winding of flexible media

Towards tailored surface topographies

Abstract

Surface roughness plays an important role in the stress state generated within a roll of a flexible material (i.e. plastic film). In can be appreciated in an indirect way through the Young's modulus of the roll in the radial direction. A theoretical model confirms the importance of this modulus. An experimental device allows to test the behavior of a single layer of film submitted to compression, and some “dynamic roughness coefficient” is introduced. The link between this coefficient and (1) some adequate (static) description of the surface topography and (2) the behavior of a stack of film layers is to be established.