Abstract
Wound rolls are often subjected to a homogeneous temperature change. This paper presents the results of internal radial stress measurement under the temperature change. In addition, Film properties such as Young's modulus and thermal expansion coefficient are measured for numerical analysis. Results from the thermal stress analysis are compared to the measurements of radial stress data for two materials: PET and PP. The result described different change between PET and PP. Moreover, measured material properties are incorporated into a calculation model which provides good agreement to the result of radial stress measurement.
