Method for obtaining heat sealing parameters of aluminum-plastic composite film

The invention discloses a method for obtaining heat sealing parameters of an aluminum-plastic composite film. The method comprises the following steps: (1) measuring a DSC curve of a polypropylene layer and obtaining an extrapolation starting temperature Te; (2) temperature rise curves of the polypropylene layer at different temperatures are collected, the time of the intersection of the temperature rise curve and Te at each temperature Ti is Si, the preset buffer time is S0, the optimal heat sealing time is the minimum value in Si, Si is larger than S0, and the temperature corresponding to the optimal heat sealing time is recorded as the optimal heat sealing temperature; (3) setting m pressure intensity Mi with different gradients to package the aluminum-plastic composite film to obtain a seal thickness curve; the thickness of the seal thickness upper interval is Ha, the thickness of the seal thickness lower interval is Hb, the Ha corresponds to the pressure intensity Ma, the Hb corresponds to the pressure i