Peel force and release strength behavior of a peel apart dry imaging film

摘要

In this work we studied peel force and release strength as functions of temperature and pressure at short times in a peel apart dry imaging film system. It is observed that peel force F (which is the force required to separate a polymer layer and imaging layer containing carbon particles) increased with temperature as well as pressure. A theory based on wetting mechanism predicts a linear relationship for lnF vs. l/T for short times at constant pressure. Form this linear relation, the activation energy Ea of the system is obtained. The good agreement between the expeirmental data and the theoretical prediction suggests that primary adhesion mechanism for this interface at short times is due to the establishment of interfacial molecular contact by wetting. It is observed also that the release strength (which is a cohesive strength of the image supporting polymer composite layer on a PET substrate) increased with temperature and pressure. The effect of temperature on the releases strength appears to illustrate a two-stage process: the first plateau may correspond to the attainment of complete wetting, and the second plateau to the attainment of equilibrium diffusion.